correcting version bump

* Add LoongArch SX support

* Add LoongArch ASX support

.github/ISSUE_TEMPLATE/bug_report.md

@@ -45,12 +45,16 @@ It is fine to report bugs against our main branch, but if that is what you are d
 
 **Configuration (please complete the following information if relevant)**
  - OS: [e.g. Ubuntu 16.04.6 LTS]
- - Compiler [e.g. Apple clang version 11.0.3 (clang-1103.0.32.59) x86_64-apple-darwin19.4.0]
+ - Compiler* [e.g. Apple clang version 11.0.3 (clang-1103.0.32.59) x86_64-apple-darwin19.4.0]
  - Version [e.g. 22]
  - Optimization setting (e.g., -O3)
 
 We support up-to-date 64-bit ARM and x64 FreeBSD, macOS, Windows and Linux systems. Please ensure that your configuration is supported before labelling the issue as a bug.
 
+* We do not support unreleased or experimental compilers. If you encounter an issue with a
+pre-release version of a compiler, do not report it as a bug to simdjson. However, we always
+invite contributions either in the form an analysis or of a code contribution.
+
 **Indicate whether you are willing or able to provide a bug fix as a pull request**
 
 If you plan to contribute to simdjson, please read our guide:

.github/workflows/alpine.yml

@@ -9,8 +9,8 @@ jobs:
       ! contains(toJSON(github.event.commits.*.message), '[skip github]')
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/cache@v3
+      - uses: actions/checkout@v4
+      - uses: actions/cache@v4
         with:
           path: dependencies/.cache
           key: ${{ hashFiles('dependencies/CMakeLists.txt') }}

.github/workflows/debian.yaml

@@ -16,7 +16,7 @@ jobs:
       image: debian:testing
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - name: Install dependencies
       run: |

.github/workflows/documentation.yml

@@ -19,7 +19,7 @@ jobs:
       url: ${{ steps.deployment.outputs.page_url }}
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install Doxygen
         run: sudo apt-get install doxygen graphviz -y
       - run: mkdir docs

.github/workflows/fix-trailing-whitespace.yml

@@ -6,7 +6,7 @@ jobs:
   whitespace:
     runs-on: ubuntu-20.04
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Remove whitespace and check the diff
         run: |
           set -eu

.github/workflows/fuzzers.yml

@@ -34,18 +34,18 @@ jobs:
         sudo apt update
         sudo apt-get install --quiet ninja-build valgrind zip unzip lsb-release wget software-properties-common gnupg
         wget https://apt.llvm.org/llvm.sh
-        sudo apt-get purge --auto-remove llvm python3-lldb-14 llvm-14
+        sudo apt-get purge --auto-remove llvm python3-lldb-15 llvm-15
         chmod +x llvm.sh
         sudo ./llvm.sh $CLANGVERSION
 
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
-    - uses: actions/cache@v3
+    - uses: actions/cache@v4
       with:
         path: dependencies/.cache
         key: ${{ hashFiles('dependencies/CMakeLists.txt') }}
 
-    - uses: actions/cache@v3
+    - uses: actions/cache@v4
       id: cache-corpus
       with:
         path: out/

.github/workflows/loongarch64.yml

@@ -0,0 +1,50 @@
+name: LoongArch64-CI
+
+on: [push, pull_request]
+
+jobs:
+  loongarch64:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        platform:
+          - { toolchain-version: 2023.08.08 }
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install build requirements
+        run: |
+          sudo apt-get update -y
+          sudo apt-get install -y --no-install-recommends cmake
+
+      - uses: actions/cache/restore@v4
+        id: restore-cache
+        with:
+          path: /opt/cross-tools
+          key: loongarch64-${{ matrix.platform.toolchain-version }}
+
+      - name: Download LoongArch64 gcc+glibc toolchain
+        if: ${{ !steps.restore-cache.outputs.cache-hit }}
+        run: |
+          url="https://github.com/loongson/build-tools/releases/download/${{ matrix.platform.toolchain-version }}/x86_64-cross-tools-loongarch64-gcc-libc.tar.xz"
+
+          wget "$url" -O /tmp/toolchain.tar.xz
+
+          mkdir -p /opt
+          tar -C /opt -x -f /tmp/toolchain.tar.xz
+
+      - uses: actions/cache/save@v3
+        if: ${{ !steps.restore-cache.outputs.cache-hit }}
+        with:
+          path: /opt/cross-tools
+          key: loongarch64-${{ matrix.platform.toolchain-version }}
+
+      - name: setup Loongarch64 build environment
+        run: |
+          echo "/opt/cross-tools/bin" >> $GITHUB_PATH
+          echo "CC=loongarch64-unknown-linux-gnu-gcc" >> $GITHUB_ENV
+          echo "CXX=loongarch64-unknown-linux-gnu-g++" >> $GITHUB_ENV
+      - name: configure
+        run: cmake -B build -DCMAKE_SYSTEM_PROCESSOR=loongarch64 -DARCH=lonngarch64 -DCMAKE_SYSTEM_NAME=Linux -DCMAKE_C_COMPILER=loongarch64-unknown-linux-gnu-gcc -DCMAKE_CXX_COMPILER=loongarch64-unknown-linux-gnu-g++
+      - name: build
+        run: cmake --build build

.github/workflows/macos.yml

@@ -9,8 +9,8 @@ jobs:
       ! contains(toJSON(github.event.commits.*.message), '[skip github]')
     runs-on: macos-latest
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/cache@v3
+      - uses: actions/checkout@v4
+      - uses: actions/cache@v4
         with:
           path: dependencies/.cache
           key: ${{ hashFiles('dependencies/CMakeLists.txt') }}

.github/workflows/msys2-clang.yml

@@ -24,8 +24,8 @@ jobs:
       CMAKE_GENERATOR: Ninja
 
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/cache@v3
+      - uses: actions/checkout@v4
+      - uses: actions/cache@v4
         with:
           path: dependencies/.cache
           key: ${{ hashFiles('dependencies/CMakeLists.txt') }}

.github/workflows/msys2.yml

@@ -26,8 +26,8 @@ jobs:
       CMAKE_GENERATOR: Ninja
 
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/cache@v3
+      - uses: actions/checkout@v4
+      - uses: actions/cache@v4
         with:
           path: dependencies/.cache
           key: ${{ hashFiles('dependencies/CMakeLists.txt') }}

.github/workflows/power-fuzz.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-20.04
     name: Build on ubuntu-20.04 ppc64le
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: uraimo/run-on-arch-action@v2.0.5
         name: Run commands
         id: runcmd

.github/workflows/ppc64.yml

@@ -12,7 +12,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: uraimo/run-on-arch-action@v2
         name: Test
         id: runcmd

.github/workflows/riscv64.yml

@@ -12,7 +12,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: uraimo/run-on-arch-action@v2
         name: Test
         id: runcmd

.github/workflows/s390x.yml

@@ -12,7 +12,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: uraimo/run-on-arch-action@v2
         name: Test
         id: runcmd

.github/workflows/ubuntu20-checkperf.yml

@@ -15,8 +15,8 @@ jobs:
       ! contains(toJSON(github.event.commits.*.message), '[skip github]')
     runs-on: ubuntu-20.04
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/cache@v3
+      - uses: actions/checkout@v4
+      - uses: actions/cache@v4
         with:
           path: dependencies/.cache
           key: ${{ hashFiles('dependencies/CMakeLists.txt') }}

.github/workflows/ubuntu20-gcc8.yml

@@ -12,8 +12,8 @@ jobs:
       CXX: g++-8
       CC: gcc-8
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/cache@v3
+      - uses: actions/checkout@v4
+      - uses: actions/cache@v4
         with:
           path: dependencies/.cache
           key: ${{ hashFiles('dependencies/CMakeLists.txt') }}

.github/workflows/ubuntu20-noexcept.yml

@@ -9,8 +9,8 @@ jobs:
       ! contains(toJSON(github.event.commits.*.message), '[skip github]')
     runs-on: ubuntu-20.04
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/cache@v3
+      - uses: actions/checkout@v4
+      - uses: actions/cache@v4
         with:
           path: dependencies/.cache
           key: ${{ hashFiles('dependencies/CMakeLists.txt') }}

.github/workflows/ubuntu20-nothread.yml

@@ -9,8 +9,8 @@ jobs:
       ! contains(toJSON(github.event.commits.*.message), '[skip github]')
     runs-on: ubuntu-20.04
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/cache@v3
+      - uses: actions/checkout@v4
+      - uses: actions/cache@v4
         with:
           path: dependencies/.cache
           key: ${{ hashFiles('dependencies/CMakeLists.txt') }}

.github/workflows/ubuntu20-sani.yml

@@ -9,8 +9,8 @@ jobs:
       ! contains(toJSON(github.event.commits.*.message), '[skip github]')
     runs-on: ubuntu-20.04
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/cache@v3
+      - uses: actions/checkout@v4
+      - uses: actions/cache@v4
         with:
           path: dependencies/.cache
           key: ${{ hashFiles('dependencies/CMakeLists.txt') }}
@@ -27,8 +27,8 @@ jobs:
       ! contains(toJSON(github.event.commits.*.message), '[skip github]')
     runs-on: ubuntu-20.04
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/cache@v3
+      - uses: actions/checkout@v4
+      - uses: actions/cache@v4
         with:
           path: dependencies/.cache
           key: ${{ hashFiles('dependencies/CMakeLists.txt') }}

.github/workflows/ubuntu20.yml

@@ -9,8 +9,8 @@ jobs:
       ! contains(toJSON(github.event.commits.*.message), '[skip github]')
     runs-on: ubuntu-20.04
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/cache@v3
+      - uses: actions/checkout@v4
+      - uses: actions/cache@v4
         with:
           path: dependencies/.cache
           key: ${{ hashFiles('dependencies/CMakeLists.txt') }}

.github/workflows/ubuntu22-clang13.yml

@@ -9,8 +9,8 @@ jobs:
       ! contains(toJSON(github.event.commits.*.message), '[skip github]')
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/cache@v3
+      - uses: actions/checkout@v4
+      - uses: actions/cache@v4
         with:
           path: dependencies/.cache
           key: ${{ hashFiles('dependencies/CMakeLists.txt') }}

.github/workflows/ubuntu22-clang14.yml

@@ -9,8 +9,8 @@ jobs:
       ! contains(toJSON(github.event.commits.*.message), '[skip github]')
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/cache@v3
+      - uses: actions/checkout@v4
+      - uses: actions/cache@v4
         with:
           path: dependencies/.cache
           key: ${{ hashFiles('dependencies/CMakeLists.txt') }}

.github/workflows/ubuntu22-cxx20.yml

@@ -9,8 +9,8 @@ jobs:
       ! contains(toJSON(github.event.commits.*.message), '[skip github]')
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/cache@v3
+      - uses: actions/checkout@v4
+      - uses: actions/cache@v4
         with:
           path: dependencies/.cache
           key: ${{ hashFiles('dependencies/CMakeLists.txt') }}

.github/workflows/ubuntu22-gcc12.yml

@@ -9,13 +9,11 @@ jobs:
       ! contains(toJSON(github.event.commits.*.message), '[skip github]')
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/cache@v3
+      - uses: actions/checkout@v4
+      - uses: actions/cache@v4
         with:
           path: dependencies/.cache
           key: ${{ hashFiles('dependencies/CMakeLists.txt') }}
-      - name: Install gcc12
-        run: sudo apt-get install -y g++-12
       - name: Use cmake
         run: |
           mkdir build &&

.github/workflows/ubuntu22-gcc13.yml

@@ -0,0 +1,23 @@
+name: Ubuntu 22.04 CI (GCC 13)
+
+on: [push, pull_request]
+
+jobs:
+  ubuntu-build:
+    if: >-
+      ! contains(toJSON(github.event.commits.*.message), '[skip ci]') &&
+      ! contains(toJSON(github.event.commits.*.message), '[skip github]')
+    runs-on: ubuntu-22.04
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/cache@v4
+        with:
+          path: dependencies/.cache
+          key: ${{ hashFiles('dependencies/CMakeLists.txt') }}
+      - name: Use cmake
+        run: |
+          mkdir build &&
+          cd build &&
+          CXX=g++-13 cmake -DSIMDJSON_DEVELOPER_MODE=ON ..  &&
+          cmake --build .   &&
+          ctest --output-on-failure -LE explicitonly -j

.github/workflows/ubuntu22-glibcxxassertions.yml

@@ -8,8 +8,8 @@ jobs:
       ! contains(toJSON(github.event.commits.*.message), '[skip github]')
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/cache@v3
+      - uses: actions/checkout@v4
+      - uses: actions/cache@v4
         with:
           path: dependencies/.cache
           key: ${{ hashFiles('dependencies/CMakeLists.txt') }}

.github/workflows/ubuntu22-threadsani.yml

@@ -1,4 +1,4 @@
-name: Ubuntu 22.04 CI (GCC 11) with Thread Sanitizer
+name: Ubuntu 22.04 CI (GCC 12) with Thread Sanitizer
 
 on: [push, pull_request]
 
@@ -9,8 +9,8 @@ jobs:
       ! contains(toJSON(github.event.commits.*.message), '[skip github]')
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/cache@v3
+      - uses: actions/checkout@v4
+      - uses: actions/cache@v4
         with:
           path: dependencies/.cache
           key: ${{ hashFiles('dependencies/CMakeLists.txt') }}
@@ -18,7 +18,7 @@ jobs:
         run: |
           mkdir build &&
           cd build &&
-          cmake  -DSIMDJSON_DEVELOPER_MODE=ON -DSIMDJSON_SANITIZE_THREADS=ON ..  &&
+          CXX=g++-12 cmake  -DSIMDJSON_DEVELOPER_MODE=ON -DSIMDJSON_SANITIZE_THREADS=ON ..  &&
           cmake --build . --target document_stream_tests  --target ondemand_document_stream_tests --target parse_many_test  &&
           ctest --output-on-failure  -R parse_many_test  &&
           ctest --output-on-failure  -R document_stream_tests

.github/workflows/ubuntu22.yml

@@ -9,8 +9,8 @@ jobs:
       ! contains(toJSON(github.event.commits.*.message), '[skip github]')
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/cache@v3
+      - uses: actions/checkout@v4
+      - uses: actions/cache@v4
         with:
           path: dependencies/.cache
           key: ${{ hashFiles('dependencies/CMakeLists.txt') }}

.github/workflows/vs17-arm-ci.yml

@@ -14,7 +14,7 @@ jobs:
            - {arch: ARM64}
      steps:
        - name: checkout
-         uses: actions/checkout@v3
+         uses: actions/checkout@v4
        - name: Use cmake
          run: |
            cmake -A ${{ matrix.arch }} -DCMAKE_CROSSCOMPILING=1 -DSIMDJSON_DEVELOPER_MODE=ON -D SIMDJSON_GOOGLE_BENCHMARKS=OFF -DSIMDJSON_EXCEPTIONS=OFF -B build  &&

.github/workflows/vs17-ci-cxx20.yml

@@ -19,7 +19,7 @@ jobs:
           - {gen: Visual Studio 17 2022, arch: x64, shared: OFF}
     steps:
     - name: checkout
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
     - name: Configure
       run: |
         cmake -DSIMDJSON_CXX_STANDARD=20 -G "${{matrix.gen}}" -A ${{matrix.arch}} -DSIMDJSON_DEVELOPER_MODE=ON -DSIMDJSON_COMPETITION=OFF -DBUILD_SHARED_LIBS=${{matrix.shared}} -B build

.github/workflows/vs17-ci.yml

@@ -19,7 +19,7 @@ jobs:
           - {gen: Visual Studio 17 2022, arch: x64, shared: OFF}
     steps:
     - name: checkout
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
     - name: Configure
       run: |
         cmake -G "${{matrix.gen}}" -A ${{matrix.arch}} -DSIMDJSON_DEVELOPER_MODE=ON -DSIMDJSON_COMPETITION=OFF -DBUILD_SHARED_LIBS=${{matrix.shared}} -B build

.github/workflows/vs17-clang-ci.yml

@@ -16,7 +16,7 @@ jobs:
           - {gen: Visual Studio 17 2022, arch: x64}
     steps:
     - name: checkout
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
     - name: Configure
       run: |
         cmake -G "${{matrix.gen}}" -A ${{matrix.arch}}  -T ClangCL -DSIMDJSON_DEVELOPER_MODE=ON -DSIMDJSON_COMPETITION=OFF -B build

.github/workflows/vs17-noexcept-ci.yml

@@ -7,8 +7,8 @@ jobs:
     name: windows-vs17
     runs-on: windows-latest
     steps:
-    - uses: actions/checkout@v3
-    - uses: actions/cache@v3
+    - uses: actions/checkout@v4
+    - uses: actions/cache@v4
       with:
         path: dependencies/.cache
         key: ${{ hashFiles('dependencies/CMakeLists.txt') }}

.vscode/settings.json

@@ -98,6 +98,17 @@
         "queue": "cpp",
         "shared_mutex": "cpp",
         "ranges": "cpp",
-        "span": "cpp"
+        "span": "cpp",
+        "__verbose_abort": "cpp",
+        "charconv": "cpp",
+        "source_location": "cpp",
+        "strstream": "cpp",
+        "typeindex": "cpp",
+        "*.tcc": "cpp",
+        "memory_resource": "cpp",
+        "numbers": "cpp",
+        "semaphore": "cpp",
+        "stop_token": "cpp",
+        "cfenv": "cpp"
     }
 }

CMakeLists.txt

@@ -3,7 +3,7 @@ cmake_minimum_required(VERSION 3.14)
 project(
     simdjson
     # The version number is modified by tools/release.py
-    VERSION 3.6.2
+    VERSION 3.9.0
     DESCRIPTION "Parsing gigabytes of JSON per second"
     HOMEPAGE_URL "https://simdjson.org/"
     LANGUAGES CXX C
@@ -20,8 +20,8 @@ string(
 # ---- Options, variables ----
 
 # These version numbers are modified by tools/release.py
-set(SIMDJSON_LIB_VERSION "19.0.0" CACHE STRING "simdjson library version")
-set(SIMDJSON_LIB_SOVERSION "19" CACHE STRING "simdjson library soversion")
+set(SIMDJSON_LIB_VERSION "22.0.0" CACHE STRING "simdjson library version")
+set(SIMDJSON_LIB_SOVERSION "22" CACHE STRING "simdjson library soversion")
 
 option(SIMDJSON_BUILD_STATIC_LIB "Build simdjson_static library along with simdjson" OFF)
 
@@ -106,6 +106,24 @@ if(
   )
 endif()
 
+if(CMAKE_SYSTEM_PROCESSOR MATCHES "^(loongarch64)$")
+    option(SIMDJSON_PREFER_LSX "Prefer LoongArch SX" ON)
+    include(CheckCXXCompilerFlag)
+    check_cxx_compiler_flag(-mlasx COMPILER_SUPPORTS_LASX)
+    check_cxx_compiler_flag(-mlsx COMPILER_SUPPORTS_LSX)
+    if(COMPILER_SUPPORTS_LASX AND NOT SIMDJSON_PREFER_LSX)
+        simdjson_add_props(
+            target_compile_options PRIVATE
+            -mlasx
+        )
+    elseif(COMPILER_SUPPORTS_LSX)
+        simdjson_add_props(
+            target_compile_options PRIVATE
+            -mlsx
+        )
+    endif()
+endif()
+
 # GCC and Clang have horrendous Debug builds when using SIMD.
 # A common fix is to use '-Og' instead.
 # bug https://gcc.gnu.org/bugzilla/show_bug.cgi?id=54412

CONTRIBUTING.md

@@ -52,10 +52,11 @@ General Guidelines
 Contributors are encouraged to :
 
 - Document their changes. Though we do not enforce a rule regarding code comments, we prefer that non-trivial algorithms and techniques be somewhat documented in the code.
-- Follow as much as possible the existing code style. We do not enforce a specific code style, but we prefer consistency.
+- Follow as much as possible the existing code style. We do not enforce a specific code style, but we prefer consistency. We avoid contractions (isn't, aren't) in the comments.
 - Modify as few lines of code as possible when working on an issue. The more lines you modify, the harder it is for your fellow human beings to understand what is going on.
 - Tools may report "problems" with the code, but we never delegate programming to tools: if there is a problem with the code, we need to understand it. Thus we will not "fix" code merely to please a static analyzer.
 - Provide tests for any new feature. We will not merge a new feature without tests.
+- Run before/after benchmarks so that we can appreciate the effect of the changes on the performance.
 
 Pull Requests
 --------------

Doxyfile

@@ -38,7 +38,7 @@ PROJECT_NAME           = simdjson
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = "3.6.2"
+PROJECT_NUMBER         = "3.9.0"
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description
 # for a project that appears at the top of each page and should give viewer a

HACKING.md

@@ -80,7 +80,7 @@ simdjson's source structure, from the top level, looks like this:
     * simdjson/internal/*.h: the `simdjson::internal` namespace. Private classes and functions used by the rest of simdjson.
   * simdjson/dom.h: the `simdjson::dom` namespace. Includes all public DOM classes.
     * simdjson/dom/*.h: Declarations/definitions for individual DOM classes.
-  * simdjson/arm64|fallback|haswell|icelake|ppc64|westmere.h: `simdjson::<implementation>` namesapce. Common implementation-specific tools like number and string parsing, as well as minification.
+  * simdjson/arm64|fallback|haswell|icelake|ppc64|westmere.h: `simdjson::<implementation>` namespace. Common implementation-specific tools like number and string parsing, as well as minification.
     * simdjson/arm64|fallback|haswell|icelake|ppc64|westmere/*.h: implementation-specific functions such as , etc.
     * simdjson/generic/*.h: the bulk of the actual code, written generically and compiled for each implementation, using functions defined in the implementation's .h files.
       * simdjson/generic/dependencies.h: dependencies on common, non-implementation-specific simdjson classes. This will be included before including amalgamated.h.
@@ -283,8 +283,6 @@ If your compiler does not default on C++11 support or better you may get failing
 
 Note that the name of directory (`build`) is arbitrary, you can name it as you want (e.g., `buildgcc`) and you can have as many different such directories as you would like (one per configuration).
 
-
-
 ## Usage (CMake on 64-bit Windows using Visual Studio 2019 or better)
 
 Recent versions of Visual Studio support CMake natively, [please refer to the Visual Studio documentation](https://learn.microsoft.com/en-us/cpp/build/cmake-projects-in-visual-studio?view=msvc-170).
@@ -304,17 +302,15 @@ Though having Visual Studio installed is necessary, one can build simdjson using
 - `mkdir build`
 - `cd build`
 - `cmake ..`
-- `cmake --build . -config Release`
+- `cmake --build . --config Release`
 
 
 Furthermore, if you have installed LLVM clang on Windows, for example as a component of Visual Studio 2019, you can configure and build simdjson using LLVM clang on Windows using cmake:
 
-
 - `mkdir build`
 - `cd build`
 - `cmake -T ClangCL ..`
-- `cmake --build . -config Release`
-
+- `cmake --build . --config Release`
 
 ## Various References
 

README.md

@@ -29,6 +29,7 @@ Table of Contents
 * [Real-world usage](#real-world-usage)
 * [Quick Start](#quick-start)
 * [Documentation](#documentation)
+* [Godbolt](#godbolt)
 * [Performance results](#performance-results)
 * [Bindings and Ports of simdjson](#bindings-and-ports-of-simdjson)
 * [About simdjson](#about-simdjson)
@@ -68,9 +69,9 @@ The simdjson library is easily consumable with a single .h and .cpp file.
 
 0. Prerequisites: `g++` (version 7 or better) or `clang++` (version 6 or better), and a 64-bit
    system with a command-line shell (e.g., Linux, macOS, freeBSD). We also support programming
-   environments like Visual Studio and Xcode, but different steps are needed.
+   environments like Visual Studio and Xcode, but different steps are needed. Users of clang++ may need to specify the C++ version (e.g., `c++ -std=c++17`) since clang++ tends to default on C++98.
 1. Pull [simdjson.h](singleheader/simdjson.h) and [simdjson.cpp](singleheader/simdjson.cpp) into a
-   directory, along with the sample file [twitter.json](jsonexamples/twitter.json).
+   directory, along with the sample file [twitter.json](jsonexamples/twitter.json). You can download them with the `wget` utility:
 
    ```
    wget https://raw.githubusercontent.com/simdjson/simdjson/master/singleheader/simdjson.h https://raw.githubusercontent.com/simdjson/simdjson/master/singleheader/simdjson.cpp https://raw.githubusercontent.com/simdjson/simdjson/master/jsonexamples/twitter.json
@@ -95,6 +96,7 @@ int main(void) {
    100 results.
   ```
 
+
 Documentation
 -------------
 
@@ -106,11 +108,12 @@ Usage documentation is available:
   how you can work with it.
 * [API](https://simdjson.github.io/simdjson/) contains the automatically generated API documentation.
 
+Godbolt
+-------------
 
 Some users may want to browse code along with the compiled assembly. You want to check out the following lists of examples:
-
-* [simdjson examples with errors handled through exceptions](https://godbolt.org/z/98Kx9Kqjn)
-* [simdjson examples with errors without exceptions](https://godbolt.org/z/PKG7GdbPo)
+* [simdjson examples with errors handled through exceptions](https://godbolt.org/z/7G5qE4sr9)
+* [simdjson examples with errors without exceptions](https://godbolt.org/z/e9dWb9E4v)
 
 Performance results
 -------------------
@@ -165,7 +168,8 @@ We distinguish between "bindings" (which just wrap the C++ code) and a port to a
 - [simdjzon](https://github.com/travisstaloch/simdjzon): zig port.
 - [JSON-Simd](https://github.com/rawleyfowler/JSON-simd): Raku bindings.
 - [JSON::SIMD](https://metacpan.org/pod/JSON::SIMD): Perl bindings; fully-featured JSON module that uses simdjson for decoding.
-- [gemmaJSON](https://github.com/sainttttt/gemmaJSON): Nim json parser based on simdjson bindings.
+- [gemmaJSON](https://github.com/sainttttt/gemmaJSON): Nim JSON parser based on simdjson bindings.
+- [simdjson-java](https://github.com/simdjson/simdjson-java): Java port.
 
 About simdjson
 --------------
@@ -174,7 +178,11 @@ The simdjson library takes advantage of modern microarchitectures, parallelizing
 instructions, reducing branch misprediction, and reducing data dependency to take advantage of each
 CPU's multiple execution cores.
 
-Some people [enjoy reading our paper](https://arxiv.org/abs/1902.08318): A description of the design
+Our default front-end is called On Demand, and we wrote a paper about it:
+
+- John Keiser, Daniel Lemire, [On-Demand JSON: A Better Way to Parse Documents?](http://arxiv.org/abs/2312.17149), Software: Practice and Experience (to appear)
+
+Some people [enjoy reading the first (2019) simdjson paper](https://arxiv.org/abs/1902.08318): A description of the design
 and implementation of simdjson is in our research article:
 - Geoff Langdale, Daniel Lemire, [Parsing Gigabytes of JSON per Second](https://arxiv.org/abs/1902.08318), VLDB Journal 28 (6), 2019.
 

SECURITY.md

@@ -0,0 +1,7 @@
+# Security Policy
+
+## Reporting a Vulnerability
+
+Please use the following contact information for reporting a vulnerability:
+
+- [Daniel Lemire](https://github.com/lemire) - daniel@lemire.me

benchmark/CMakeLists.txt

@@ -26,6 +26,9 @@ if (TARGET benchmark::benchmark)
     if(TARGET nlohmann_json)
       target_link_libraries(bench_ondemand PRIVATE nlohmann_json)
     endif()
+    if(TARGET boostjson)
+      target_link_libraries(bench_ondemand PRIVATE boostjson)
+    endif()
   endif()
 endif()
 

benchmark/apple/apple_arm_events.h

@@ -993,7 +993,6 @@ struct AppleEvents {
     // check permission
     int force_ctrs = 0;
     if (kpc_force_all_ctrs_get(&force_ctrs)) {
-      printf("Permission denied, xnu/kpc requires root privileges.\n");
       return (worked = false);
     }
     int ret;
@@ -1100,8 +1099,8 @@ struct AppleEvents {
       return 1;
     }
     return performance_counters {
-        counters_0[counter_map[0]], counters_0[counter_map[3]],
-        counters_0[counter_map[2]], counters_0[counter_map[1]]};
+        counters_0[counter_map[0]], counters_0[counter_map[2]],
+        counters_0[counter_map[3]], counters_0[counter_map[1]]};
   }
 };
 

benchmark/bench_dom_api.cpp

@@ -473,28 +473,6 @@ static void twitter_count(State& state) {
 }
 BENCHMARK(twitter_count);
 
-#ifndef SIMDJSON_DISABLE_DEPRECATED_API
-SIMDJSON_PUSH_DISABLE_WARNINGS
-SIMDJSON_DISABLE_DEPRECATED_WARNING
-static void iterator_twitter_count(State& state) {
-  // Prints the number of results in twitter.json
-  padded_string json = padded_string::load(TWITTER_JSON);
-  ParsedJson pj = build_parsed_json(json);
-  for (simdjson_unused auto _ : state) {
-    ParsedJson::Iterator iter(pj);
-    // uint64_t result_count = doc["search_metadata"]["count"];
-    if (!iter.move_to_key("search_metadata")) { return; }
-    if (!iter.move_to_key("count")) { return; }
-    if (!iter.is_integer()) { return; }
-    int64_t result_count = iter.get_integer();
-
-    if (result_count != 100) { return; }
-  }
-}
-BENCHMARK(iterator_twitter_count);
-SIMDJSON_POP_DISABLE_WARNINGS
-#endif // SIMDJSON_DISABLE_DEPRECATED_API
-
 static void twitter_default_profile(State& state) {
   // Count unique users with a default profile.
   dom::parser parser;
@@ -578,54 +556,6 @@ static void error_code_twitter_default_profile(State& state) noexcept {
 }
 BENCHMARK(error_code_twitter_default_profile);
 
-#ifndef SIMDJSON_DISABLE_DEPRECATED_API
-
-SIMDJSON_PUSH_DISABLE_WARNINGS
-SIMDJSON_DISABLE_DEPRECATED_WARNING
-
-static void iterator_twitter_default_profile(State& state) {
-  // Count unique users with a default profile.
-  padded_string json;
-  auto error = padded_string::load(TWITTER_JSON).get(json);
-  if (error) { std::cerr << error << std::endl; return; }
-  ParsedJson pj = build_parsed_json(json);
-  for (simdjson_unused auto _ : state) {
-    set<string_view> default_users;
-    ParsedJson::Iterator iter(pj);
-
-    // for (dom::object tweet : doc["statuses"]) {
-    if (!(iter.move_to_key("statuses") && iter.is_array())) { return; }
-    if (iter.down()) { // first status
-      do {
-
-        // dom::object user = tweet["user"];
-        if (!(iter.move_to_key("user") && iter.is_object())) { return; }
-
-        // if (user["default_profile"]) {
-        if (iter.move_to_key("default_profile")) {
-          if (iter.is_true()) {
-            if (!iter.up()) { return; } // back to user
-
-            // default_users.insert(user["screen_name"]);
-            if (!(iter.move_to_key("screen_name") && iter.is_string())) { return; }
-            default_users.emplace(iter.get_string(), iter.get_string_length());
-          }
-          if (!iter.up()) { return; } // back to user
-        }
-
-        if (!iter.up()) { return; } // back to status
-
-      } while (iter.next()); // next status
-    }
-
-    if (default_users.size() != 86) { return; }
-  }
-}
-
-SIMDJSON_POP_DISABLE_WARNINGS
-BENCHMARK(iterator_twitter_default_profile);
-#endif // SIMDJSON_DISABLE_DEPRECATED_API
-
 static void error_code_twitter_image_sizes(State& state) noexcept {
   // Count unique image sizes
   dom::parser parser;
@@ -680,92 +610,4 @@ static void parse_surrogate_pairs(State& state) {
 }
 BENCHMARK(parse_surrogate_pairs);
 
-
-#ifndef SIMDJSON_DISABLE_DEPRECATED_API
-
-SIMDJSON_PUSH_DISABLE_WARNINGS
-SIMDJSON_DISABLE_DEPRECATED_WARNING
-static void iterator_twitter_image_sizes(State& state) {
-  // Count unique image sizes
-  padded_string json;
-  auto error = padded_string::load(TWITTER_JSON).get(json);
-  if (error) { std::cerr << error << std::endl; return; }
-  ParsedJson pj = build_parsed_json(json);
-  for (simdjson_unused auto _ : state) {
-    set<tuple<uint64_t, uint64_t>> image_sizes;
-    ParsedJson::Iterator iter(pj);
-
-    // for (dom::object tweet : doc["statuses"]) {
-    if (!(iter.move_to_key("statuses") && iter.is_array())) { return; }
-    if (iter.down()) { // first status
-      do {
-
-        // dom::object media;
-        // not_found = tweet["entities"]["media"].get(media);
-        // if (!not_found) {
-        if (iter.move_to_key("entities")) {
-          if (!iter.is_object()) { return; }
-          if (iter.move_to_key("media")) {
-            if (!iter.is_array()) { return; }
-
-            //   for (dom::object image : media) {
-            if (iter.down()) { // first media
-              do {
-
-                // for (auto [key, size] : dom::object(image["sizes"])) {
-                if (!(iter.move_to_key("sizes") && iter.is_object())) { return; }
-                if (iter.down()) { // first size
-                  do {
-                    iter.move_to_value();
-
-                    // image_sizes.insert({ size["w"], size["h"] });
-                    if (!(iter.move_to_key("w")) && !iter.is_integer()) { return; }
-                    uint64_t width = iter.get_integer();
-                    if (!iter.up()) { return; } // back to size
-                    if (!(iter.move_to_key("h")) && !iter.is_integer()) { return; }
-                    uint64_t height = iter.get_integer();
-                    if (!iter.up()) { return; } // back to size
-                    image_sizes.emplace(width, height);
-
-                  } while (iter.next()); // next size
-                  if (!iter.up()) { return; } // back to sizes
-                }
-                if (!iter.up()) { return; } // back to image
-              } while (iter.next()); // next image
-              if (!iter.up()) { return; } // back to media
-            }
-            if (!iter.up()) { return; } // back to entities
-          }
-          if (!iter.up()) { return; } // back to status
-        }
-      } while (iter.next()); // next status
-    }
-
-    if (image_sizes.size() != 15) { return; };
-  }
-}
-BENCHMARK(iterator_twitter_image_sizes);
-
-#endif // SIMDJSON_DISABLE_DEPRECATED_API
-
-#ifndef SIMDJSON_DISABLE_DEPRECATED_API
-static void print_json(State& state) noexcept {
-  // Prints the number of results in twitter.json
-  dom::parser parser;
-
-  padded_string json;
-  auto error = padded_string::load(TWITTER_JSON).get(json);
-  if (error) { std::cerr << error << std::endl; return; }
-
-  int code = json_parse(json, parser);
-  if (code) { cerr << error_message(code) << endl; return; }
-  for (simdjson_unused auto _ : state) {
-    std::stringstream s;
-    if (!parser.print_json(s)) { cerr << "print_json failed" << endl; return; }
-  }
-}
-BENCHMARK(print_json);
-#endif // SIMDJSON_DISABLE_DEPRECATED_API
-SIMDJSON_POP_DISABLE_WARNINGS
-
 BENCHMARK_MAIN();

benchmark/bench_ondemand.cpp

@@ -21,6 +21,10 @@ SIMDJSON_PUSH_DISABLE_ALL_WARNINGS
 #include <nlohmann/json.hpp>
 #endif
 
+#ifdef SIMDJSON_COMPETITION_BOOSTJSON
+#include <boost/json.hpp>
+#endif
+
 // This has to be last, for reasons I don't yet understand
 #include <benchmark/benchmark.h>
 
@@ -33,6 +37,7 @@ SIMDJSON_POP_DISABLE_WARNINGS
 #include "json2msgpack/sajson.h"
 #endif // SIMDJSON_COMPETITION_ONDEMAND_SAJSON
 #include "json2msgpack/nlohmann_json.h"
+#include "json2msgpack/boostjson.h"
 
 #include "partial_tweets/simdjson_ondemand.h"
 #include "partial_tweets/simdjson_dom.h"
@@ -48,6 +53,7 @@ SIMDJSON_POP_DISABLE_WARNINGS
 #if SIMDJSON_COMPETITION_SAX
 #include "partial_tweets/nlohmann_json_sax.h"
 #endif // SIMDJSON_COMPETITION_SAX
+#include "partial_tweets/boostjson.h"
 
 
 #include "distinct_user_id/simdjson_ondemand.h"
@@ -66,6 +72,7 @@ SIMDJSON_POP_DISABLE_WARNINGS
 #if SIMDJSON_COMPETITION_SAX
 #include "distinct_user_id/nlohmann_json_sax.h"
 #endif // SIMDJSON_COMPETITION_SAX
+#include "distinct_user_id/boostjson.h"
 
 #include "find_tweet/simdjson_ondemand.h"
 #include "find_tweet/simdjson_dom.h"
@@ -81,6 +88,7 @@ SIMDJSON_POP_DISABLE_WARNINGS
 #if SIMDJSON_COMPETITION_SAX
 #include "find_tweet/nlohmann_json_sax.h"
 #endif // SIMDJSON_COMPETITION_SAX
+#include "find_tweet/boostjson.h"
 
 #include "top_tweet/simdjson_ondemand.h"
 #include "top_tweet/simdjson_dom.h"
@@ -96,6 +104,7 @@ SIMDJSON_POP_DISABLE_WARNINGS
 #if SIMDJSON_COMPETITION_SAX
 #include "top_tweet/nlohmann_json_sax.h"
 #endif // SIMDJSON_COMPETITION_SAX
+#include "top_tweet/boostjson.h"
 
 
 #include "kostya/simdjson_ondemand.h"
@@ -112,6 +121,7 @@ SIMDJSON_POP_DISABLE_WARNINGS
 #if SIMDJSON_COMPETITION_SAX
 #include "kostya/nlohmann_json_sax.h"
 #endif // SIMDJSON_COMPETITION_SAX
+#include "kostya/boostjson.h"
 
 #include "large_random/simdjson_ondemand.h"
 #if SIMDJSON_COMPETITION_ONDEMAND_UNORDERED
@@ -130,6 +140,7 @@ SIMDJSON_POP_DISABLE_WARNINGS
 #if SIMDJSON_COMPETITION_SAX
 #include "large_random/nlohmann_json_sax.h"
 #endif // SIMDJSON_COMPETITION_SAX
+#include "large_random/boostjson.h"
 
 #include "amazon_cellphones/simdjson_dom.h"
 #include "amazon_cellphones/simdjson_ondemand.h"

benchmark/bench_parse_call.cpp

@@ -169,22 +169,6 @@ BENCHMARK(parse_gsoc)->Repetitions(10)->ComputeStatistics("max", [](const std::v
   })->DisplayAggregatesOnly(true);
 
 
-
-#ifndef SIMDJSON_DISABLE_DEPRECATED_API
-SIMDJSON_PUSH_DISABLE_WARNINGS
-SIMDJSON_DISABLE_DEPRECATED_WARNING
-static void json_parse(State& state) {
-  ParsedJson pj;
-  if (!pj.allocate_capacity(EMPTY_ARRAY.length())) { return; }
-  for (simdjson_unused auto _ : state) {
-    auto error = json_parse(EMPTY_ARRAY, pj);
-    if (error) { return; }
-  }
-}
-SIMDJSON_POP_DISABLE_WARNINGS
-BENCHMARK(json_parse);
-#endif // SIMDJSON_DISABLE_DEPRECATED_API
-
 static void parser_parse_error_code(State& state) {
   dom::parser parser;
   if (parser.allocate(EMPTY_ARRAY.length())) { return; }
@@ -213,20 +197,6 @@ BENCHMARK(parser_parse_exception);
 
 #endif // SIMDJSON_EXCEPTIONS
 
-#ifndef SIMDJSON_DISABLE_DEPRECATED_API
-SIMDJSON_PUSH_DISABLE_WARNINGS
-SIMDJSON_DISABLE_DEPRECATED_WARNING
-static void build_parsed_json(State& state) {
-  for (simdjson_unused auto _ : state) {
-    dom::parser parser = simdjson::build_parsed_json(EMPTY_ARRAY);
-    if (!parser.valid) { return; }
-  }
-}
-SIMDJSON_POP_DISABLE_WARNINGS
-
-BENCHMARK(build_parsed_json);
-#endif
-
 static void document_parse_error_code(State& state) {
   for (simdjson_unused auto _ : state) {
     dom::parser parser;

benchmark/distinct_user_id/boostjson.h

@@ -0,0 +1,29 @@
+#pragma once
+
+#ifdef SIMDJSON_COMPETITION_BOOSTJSON
+
+#include "distinct_user_id.h"
+
+namespace distinct_user_id {
+
+struct boostjson {
+  bool run(simdjson::padded_string &json, std::vector<uint64_t> &result) {
+
+    auto root = boost::json::parse(json);
+    for (const auto &tweet : root.at("statuses").as_array()) {
+      result.push_back(tweet.at("user").at("id").to_number<uint64_t>());
+
+      if (tweet.as_object().if_contains("retweeted_status")) {
+        result.push_back(tweet.at("retweeted_status").at("user").at("id").to_number<uint64_t>());
+      }
+    }
+
+    return true;
+  }
+};
+
+BENCHMARK_TEMPLATE(distinct_user_id, boostjson)->UseManualTime();
+
+} // namespace distinct_user_id
+
+#endif // SIMDJSON_COMPETITION_BOOSTJSON

benchmark/find_tweet/boostjson.h

@@ -0,0 +1,30 @@
+#pragma once
+
+#ifdef SIMDJSON_COMPETITION_BOOSTJSON
+
+#include "find_tweet.h"
+
+namespace find_tweet {
+
+struct boostjson {
+  using StringType=std::string;
+
+  bool run(simdjson::padded_string &json, uint64_t find_id, std::string &result) {
+
+    auto root = boost::json::parse(json);
+    for (const auto &tweet : root.at("statuses").as_array()) {
+      if (tweet.at("id") == find_id) {
+        result = tweet.at("text").as_string();
+        return true;
+      }
+    }
+
+    return false;
+  }
+};
+
+BENCHMARK_TEMPLATE(find_tweet, boostjson)->UseManualTime();
+
+} // namespace find_tweet
+
+#endif // SIMDJSON_COMPETITION_BOOSTJSON

benchmark/json2msgpack/boostjson.h

@@ -0,0 +1,104 @@
+#pragma once
+
+#ifdef SIMDJSON_COMPETITION_BOOSTJSON
+
+#include "json2msgpack.h"
+
+namespace json2msgpack {
+
+struct boostjson2msgpack {
+  inline std::string_view to_msgpack(const boost::json::value &root, uint8_t *buf) {
+    buff = buf;
+    recursive_processor(root);
+    return std::string_view(reinterpret_cast<char *>(buf), size_t(buff - buf));
+  }
+
+private:
+  uint8_t *buff{};
+
+  inline void write_double(const double d) noexcept {
+    *buff++ = 0xcb;
+    ::memcpy(buff, &d, sizeof(d));
+    buff += sizeof(d);
+  }
+
+  inline void write_byte(const uint8_t b) noexcept {
+    *buff = b;
+    buff++;
+  }
+
+  inline void write_uint32(const uint32_t w) noexcept {
+    ::memcpy(buff, &w, sizeof(w));
+    buff += sizeof(w);
+  }
+
+  inline void write_string(const std::string & str) {
+    write_byte(0xdb);
+    write_uint32(uint32_t(str.size()));
+    ::memcpy(buff, str.data(), str.size());
+    buff += str.size();
+  }
+
+  inline void recursive_processor(const boost::json::value &element) {
+    switch(element.kind()) {
+    case boost::json::kind::array: {
+      write_byte(0xdd);
+      const auto &array = element.as_array();
+      write_uint32(static_cast<uint32_t>(array.size()));
+      for (const auto &child : array) {
+        recursive_processor(child);
+      }
+    } break;
+
+    case boost::json::kind::object: {
+      write_byte(0xdf);
+      const auto &object = element.as_object();
+      write_uint32(static_cast<uint32_t>(object.size()));
+      for (const auto &child : object) {
+        write_string(child.key_c_str());
+        recursive_processor(child.value());
+      }
+    } break;
+
+    case boost::json::kind::int64:
+    case boost::json::kind::uint64:
+    case boost::json::kind::double_:
+      write_double(element.to_number<double>());
+      break;
+
+    case boost::json::kind::string:
+      write_string(element.as_string().c_str());
+      break;
+
+    case boost::json::kind::bool_:
+      write_byte(0xc2 + element.as_bool());
+      break;
+
+    case boost::json::kind::null:
+      write_byte(0xc0);
+      break;
+
+    default:
+      printf("unexpected\n");
+      break;
+    }
+  }
+};
+
+struct boostjson {
+  using StringType=std::string;
+
+  boostjson2msgpack parser{};
+
+  bool run(simdjson::padded_string &json, char *buffer, std::string_view &result) {
+    auto root = boost::json::parse(json);
+    result = parser.to_msgpack(root, reinterpret_cast<uint8_t *>(buffer));
+    return true;
+  }
+};
+
+BENCHMARK_TEMPLATE(json2msgpack, boostjson)->UseManualTime();
+
+} // namespace json2msgpack
+
+#endif // SIMDJSON_COMPETITION_BOOSTJSON

benchmark/json_benchmark/file_runner.h

@@ -24,7 +24,7 @@ struct file_runner : public runner_base<I> {
 
   simdjson_warn_unused bool before_run(benchmark::State &state) {
     if (!runner_base<I>::after_run(state)) { return false; };
-    // Copy the original json in case we did *in situ* last time
+    // Copy the original JSON in case we did *in situ* last time
     std::memcpy(json.data(), original_json.data(), original_json.size());
     return true;
   }

benchmark/json_benchmark/string_runner.h

@@ -13,7 +13,7 @@ struct string_runner : public runner_base<I> {
 
   simdjson_warn_unused bool before_run(benchmark::State &state) {
     if (!runner_base<I>::after_run(state)) { return false; };
-    // Copy the original json in case we did *in situ*
+    // Copy the original JSON in case we did *in situ*
     std::memcpy(json.data(), original_json.data(), original_json.size());
     return true;
   }

benchmark/kostya/boostjson.h

@@ -0,0 +1,29 @@
+#pragma once
+
+#ifdef SIMDJSON_COMPETITION_BOOSTJSON
+
+#include "kostya.h"
+
+namespace kostya {
+
+struct boostjson {
+  static constexpr diff_flags DiffFlags = diff_flags::IMPRECISE_FLOATS;
+
+  bool run(simdjson::padded_string &json, std::vector<point> &result) {
+    auto root = boost::json::parse(json);
+    for (const auto &point : root.at("coordinates").as_array()) {
+      result.emplace_back(json_benchmark::point{
+        point.at("x").to_number<double>(),
+        point.at("y").to_number<double>(),
+        point.at("z").to_number<double>()
+      });
+    }
+    return true;
+  }
+};
+
+BENCHMARK_TEMPLATE(kostya, boostjson)->UseManualTime();
+
+} // namespace kostya
+
+#endif // SIMDJSON_COMPETITION_BOOSTJSON

benchmark/large_random/boostjson.h

@@ -0,0 +1,29 @@
+#pragma once
+
+#ifdef SIMDJSON_COMPETITION_BOOSTJSON
+
+#include "large_random.h"
+
+namespace large_random {
+
+struct boostjson {
+  static constexpr diff_flags DiffFlags = diff_flags::IMPRECISE_FLOATS;
+
+  bool run(simdjson::padded_string &json, std::vector<point> &result) {
+    auto root = boost::json::parse(json);
+    for (const auto &point : root.as_array()) {
+      result.emplace_back(json_benchmark::point{
+        point.at("x").to_number<double>(),
+        point.at("y").to_number<double>(),
+        point.at("z").to_number<double>()
+      });
+    }
+    return true;
+  }
+};
+
+BENCHMARK_TEMPLATE(large_random, boostjson)->UseManualTime();
+
+} // namespace large_random
+
+#endif // SIMDJSON_COMPETITION_BOOSTJSON

benchmark/partial_tweets/boostjson.h

@@ -0,0 +1,43 @@
+#pragma once
+
+#ifdef SIMDJSON_COMPETITION_BOOSTJSON
+
+#include "partial_tweets.h"
+
+namespace partial_tweets {
+
+struct boostjson {
+  using StringType=std::string;
+
+  bool run(simdjson::padded_string &json, std::vector<tweet<StringType>> &result) {
+
+    auto root = boost::json::parse(json);
+    for (const auto &tweet : root.at("statuses").as_array()) {
+      const auto &user = tweet.at("user");
+
+      auto in_reply_to_status_id = tweet.as_object().if_contains("in_reply_to_status_id")
+        ? tweet.at("in_reply_to_status_id") : boost::json::value();
+
+      result.emplace_back(partial_tweets::tweet<StringType>{
+        tweet.at("created_at").as_string().c_str(),
+        tweet.at("id").to_number<uint64_t>(),
+        tweet.at("text").as_string().c_str(),
+        in_reply_to_status_id.is_null() ? 0 : in_reply_to_status_id.to_number<uint64_t>(),
+        {
+          user.at("id").to_number<uint64_t>(),
+          user.at("screen_name").as_string().c_str()
+        },
+        tweet.at("retweet_count").to_number<uint64_t>(),
+        tweet.at("favorite_count").to_number<uint64_t>()
+      });
+    }
+
+    return true;
+  }
+};
+
+BENCHMARK_TEMPLATE(partial_tweets, boostjson)->UseManualTime();
+
+} // namespace partial_tweets
+
+#endif // SIMDJSON_COMPETITION_BOOSTJSON

benchmark/top_tweet/boostjson.h

@@ -0,0 +1,37 @@
+#pragma once
+
+#if SIMDJSON_COMPETITION_BOOSTJSON
+
+#include "top_tweet.h"
+
+namespace top_tweet {
+
+using namespace simdjson;
+
+struct boostjson {
+  using StringType=std::string;
+
+  bool run(simdjson::padded_string &json, int64_t max_retweet_count, top_tweet_result<StringType> &result) {
+    result.retweet_count = -1;
+    boost::json::value top_tweet{};
+
+    auto root = boost::json::parse(json);
+    for (const auto &tweet : root.at("statuses").as_array()) {
+      int64_t retweet_count = tweet.at("retweet_count").as_int64();
+      if (retweet_count <= max_retweet_count && retweet_count >= result.retweet_count) {
+        result.retweet_count = retweet_count;
+        top_tweet = tweet;
+      }
+    }
+
+    result.text = top_tweet.at("text").as_string();
+    result.screen_name = top_tweet.at("user").at("screen_name").as_string();
+    return result.retweet_count != -1;
+  }
+};
+
+BENCHMARK_TEMPLATE(top_tweet, boostjson)->UseManualTime();
+
+} // namespace top_tweet
+
+#endif // SIMDJSON_COMPETITION_BOOSTJSON

dependencies/CMakeLists.txt

@@ -22,7 +22,7 @@ endif()
 # The bulk of our benchmarking and testing data has been moved simdjson/simdjson-data
 import_dependency(simdjson-data simdjson/simdjson-data a5b13babe65c1bba7186b41b43d4cbdc20a5c470)
 add_dependency(simdjson-data)
-
+option(SIMDJSON_USE_BOOST_JSON "Try to include BOOST_JSON, this may break your binaries under some systems." OFF)
 # This prevents variables declared with set() from unnecessarily escaping and
 # should not be called more than once
 function(competition_scope_)
@@ -36,8 +36,8 @@ function(competition_scope_)
 #endif
 
 int main() {}
-]] USE_BOOST_JSON)
-  if(USE_BOOST_JSON)
+]] SIMDJSON_FOUND_STRING_VIEW)
+  if(SIMDJSON_FOUND_STRING_VIEW AND SIMDJSON_USE_BOOST_JSON)
     import_dependency(boostjson boostorg/json ee8d72d)
     add_library(boostjson STATIC "${boostjson_SOURCE_DIR}/src/src.cpp")
     target_compile_definitions(boostjson PUBLIC BOOST_JSON_STANDALONE)
@@ -104,7 +104,11 @@ int main() {}
   target_compile_definitions(rapidjson INTERFACE RAPIDJSON_HAS_STDSTRING)
   target_include_directories(rapidjson SYSTEM INTERFACE
           "${rapidjson_SOURCE_DIR}/include")
-  target_compile_definitions(rapidjson INTERFACE SIMDJSON_COMPETITION_RAPIDJSON)
+  if (CMAKE_COMPILER_IS_GNUCC AND CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 14)
+    message(STATUS "Disabling rapidjson")
+  else()
+    target_compile_definitions(rapidjson INTERFACE SIMDJSON_COMPETITION_RAPIDJSON)
+  endif()
 
   import_dependency(sajson chadaustin/sajson 2dcfd35)
   add_library(sajson INTERFACE)
@@ -130,7 +134,7 @@ int main() {}
   add_library(competition-core INTERFACE)
   target_link_libraries(competition-core INTERFACE nlohmann_json rapidjson sajson cjson jsmn yyjson)
 
-  if(USE_BOOST_JSON)
+  if(TARGET boostjson)
      target_compile_definitions(boostjson INTERFACE HAS_BOOST_JSON)
      target_link_libraries(competition-core INTERFACE boostjson)
   endif()

doc/basics.md

@@ -15,9 +15,11 @@ An overview of what you need to know to use simdjson, with examples.
   - [string_view](#string_view)
   - [Using the Parsed JSON](#using-the-parsed-json)
     - [Using the Parsed JSON: Additional examples](#using-the-parsed-json-additional-examples)
+  - [Adding support for custom types](#adding-support-for-custom-types)
   - [Minifying JSON strings without parsing](#minifying-json-strings-without-parsing)
   - [UTF-8 validation (alone)](#utf-8-validation-alone)
   - [JSON Pointer](#json-pointer)
+  - [JSONPath](#json-path)
   - [Error Handling](#error-handling)
     - [Error Handling Examples without Exceptions](#error-handling-examples-without-exceptions)
     - [Disabling Exceptions](#disabling-exceptions)
@@ -28,7 +30,7 @@ An overview of what you need to know to use simdjson, with examples.
   - [Newline-Delimited JSON (ndjson) and JSON lines](#newline-delimited-json-ndjson-and-json-lines)
   - [Parsing Numbers Inside Strings](#parsing-numbers-inside-strings)
   - [Dynamic Number Types](#dynamic-number-types)
-  - [Raw Strings](#raw-strings)
+  - [Raw Strings From Keys](#raw-strings-from-keys)
   - [General Direct Access to the Raw JSON String](#general-direct-access-to-the-raw-json-string)
   - [Storing Directly into an Existing String Instance](#storing-directly-into-an-existing-string-instance)
   - [Thread Safety](#thread-safety)
@@ -36,6 +38,7 @@ An overview of what you need to know to use simdjson, with examples.
   - [Backwards Compatibility](#backwards-compatibility)
   - [Examples](#examples)
   - [Performance Tips](#performance-tips)
+  - [Further Reading](#further-reading)
 
 
 Requirements
@@ -68,7 +71,7 @@ c++ myproject.cpp simdjson.cpp
 
 Note:
 - Users on macOS and other platforms where default compilers do not provide C++11 compliant by default should request it with the appropriate flag (e.g., `c++ -std=c++11 myproject.cpp simdjson.cpp`).
-- The library relies on [runtime CPU detection](implementation-selection.md): avoid specifying an architecture at compile time (e.g., `-march-native`).
+- The library relies on [runtime CPU detection](implementation-selection.md): avoid specifying an architecture at compile time (e.g., `-march-native`) if you want your binaries to run everywhere.
 
 Using simdjson with package managers
 ------------------
@@ -209,6 +212,12 @@ Some users may want to browse code along with the compiled assembly. You want to
 * [simdjson examples with errors handled through exceptions](https://godbolt.org/z/98Kx9Kqjn)
 * [simdjson examples with errors without exceptions](https://godbolt.org/z/PKG7GdbPo)
 
+*Windows-specific*:  Windows users who need to read files with
+non-ANSI characters in the name should set their code page to
+UTF-8 (65001). This should be the default with Windows 11 and better.
+Further, they may use the AreFileApisANSI function to determine whether
+the filename is interpreted using the ANSI or the system default OEM
+codepage, and they may call SetFileApisToOEM accordingly.
 
 Documents are Iterators
 -----------------------
@@ -220,7 +229,7 @@ walking through the original JSON text, merrily reading commas and colons and br
 you get where you are going. This is the key to On Demand's performance: since it's just an iterator,
 it lets you parse values as you use them. And particularly, it lets you *skip* values you do not want
 to use. On Demand is also ideally suited when you want to capture part of the document without parsing it
-immediately (e.g., see [Raw Strings](#raw-strings)).
+immediately (e.g., see [General Direct Access to the Raw JSON String](#general-direct-access-to-the-raw-json-string)).
 
 We refer to "On Demand" as a front-end component since it is an interface between the
 low-level parsing functions and the user. It hides much of the complexity of parsing JSON
@@ -255,7 +264,7 @@ copy the data into their own favorite class instances (e.g., alternatives to `st
 
 A `std::string_view` instance is effectively just a pointer to a region in memory representing
 a string. In simdjson, we return `std::string_view` instances that either point within the
-input string you parsed (when using [raw Strings](#raw-strings)), or to a temporary string buffer inside
+input string you parsed (see [General Direct Access to the Raw JSON String](#general-direct-access-to-the-raw-json-string)), or to a temporary string buffer inside
 our parser class instances that is valid until the parser object is destroyed or you use it to parse another document.
 When using `std::string_view` instances, it is your responsibility to ensure that
 `std::string_view` instance does not outlive the pointed-to memory (e.g., either the input
@@ -326,7 +335,7 @@ We invite you to keep the following rules in mind:
 The simdjson library makes generous use of `std::string_view` instances. If you are unfamiliar
 with `std::string_view` in C++, make sure to [read the section on std::string_view](#string_view).
 They behave much like an immutable `std::string` but they require no memory allocation. You can
-create a `std::string` instance from an `std::string_view` when you need it.
+create a `std::string` instance from a `std::string_view` when you need it.
 
 The following specific instructions indicate how to use the JSON when exceptions are enabled, but simdjson has full, idiomatic
 support for users who avoid exceptions. See [the simdjson error handling documentation](basics.md#error-handling) for more.
@@ -369,7 +378,7 @@ support for users who avoid exceptions. See [the simdjson error handling documen
   Debug mode: an OUT_OF_ORDER_ITERATION error is generated.
 
   > NOTE: JSON allows you to escape characters in keys. E.g., the key `"date"` may be written as
-  > `"\u0064\u0061\u0074\u0065"`. By default, simdjson does *not* unescape keys when matching by default.
+  > `"\u0064\u0061\u0074\u0065"`. By default, simdjson does *not* unescape keys when matching.
   > Thus if you search for the key `"date"` and the JSON document uses `"\u0064\u0061\u0074\u0065"`
   > as a key, it will not be recognized. This is not generally a problem.  Nevertheless, if you do need
   > to support escaped keys, the method `unescaped_key()` provides the desired unescaped keys by
@@ -378,7 +387,9 @@ support for users who avoid exceptions. See [the simdjson error handling documen
   > Unicode sequences with replacement, meaning that the decoding always succeeds but bogus Unicode
   > replacement characters are inserted. In general, you should expect a performance penalty
   > when using `unescaped_key()` compared to `key()` because of the string processing: the `key()`
-  > function just points inside the source JSON document.
+  > function just points inside the source JSON document. As a compromise, you may use `escaped_key()``
+  > which returns a `std::string_view` instance pointing directly in the document, like `key()`, although,
+  > unlike `key()`, it has to determine the location of the final quote character.
   >
   > ```c++
   > auto json = R"({"k\u0065y": 1})"_padded;
@@ -388,6 +399,9 @@ support for users who avoid exceptions. See [the simdjson error handling documen
   > for(auto field : object) {
   >    // parses and writes out the key, after unescaping it,
   >    // to a string buffer. It causes a performance penalty.
+  >    // If you do not expect that unescaping is useful, you
+  >    // may replace field.unescaped_key() with
+  >    // field.escaped_key().
   >    std::string_view keyv = field.unescaped_key();
   >    if (keyv == "key") { std::cout << uint64_t(field.value()); }
   >  }
@@ -423,9 +437,10 @@ support for users who avoid exceptions. See [the simdjson error handling documen
 
   If you know the type of the value, you can cast it right there, too! `for (double value : array) { ... }`.
 
-  You may also use explicit iterators: `for(auto i = array.begin(); i != array.end(); i++) {}`. You can check that an array is empty with the condition `auto i = array.begin(); if(i == array.end()) {...}`.
-* **Object Iteration:** You can iterate through an object's fields, as well: `for (auto field : object) { ... }`. You may also use explicit iterators : `for(auto i = object.begin(); i != object.end(); i++) { auto field = *i; .... }`. You can check that an object is empty with the condition `auto i = object.begin(); if(i == object.end()) {...}`.
-  - `field.unescaped_key()` will get you the unescaped key string. E.g., the JSON string `"\u00e1"` becomes the Unicode string `á`. Optionally,  you pass `true` as a parameter to the `unescaped_key` method if you want invalid escape sequences to be replaced by a default replacement character (e.g., `\ud800\ud801\ud811`): otherwise bad escape sequences lead to an immediate error.
+  You may also use explicit iterators: `for(auto i = array.begin(); i != array.end(); i++) {}`. You can check that an array is empty with the condition `auto i = array.begin(); if (i == array.end()) {...}`.
+* **Object Iteration:** You can iterate through an object's fields, as well: `for (auto field : object) { ... }`. You may also use explicit iterators : `for(auto i = object.begin(); i != object.end(); i++) { auto field = *i; .... }`. You can check that an object is empty with the condition `auto i = object.begin(); if (i == object.end()) {...}`.
+  - `field.unescaped_key()` will get you the unescaped key string as a `std::string_view` instance. E.g., the JSON string `"\u00e1"` becomes the Unicode string `á`. Optionally,  you pass `true` as a parameter to the `unescaped_key` method if you want invalid escape sequences to be replaced by a default replacement character (e.g., `\ud800\ud801\ud811`): otherwise bad escape sequences lead to an immediate error.
+  - `field.escaped_key()` will get you the key string as  as a `std::string_view` instance, but unlike `unescaped_key()`, the key is not processed, so no unescaping is done. E.g., the JSON string `"\u00e1"` becomes the Unicode string `\u00e1`. We expect that `escaped_key()` is faster than `field.unescaped_key()`.
   - `field.value()` will get you the value, which you can then use all these other methods on.
 * **Array Index:** Because it is forward-only, you cannot look up an array element by index by index. Instead,
   you should iterate through the array and keep an index yourself.
@@ -545,7 +560,7 @@ support for users who avoid exceptions. See [the simdjson error handling documen
 * **Tree Walking and JSON Element Types:** Sometimes you don't necessarily have a document
   with a known type, and are trying to generically inspect or walk over JSON elements.
   You can also represent arbitrary JSON values with
-  `ondemand::value` instances: it can represent anything except a scalar document (lone number, string, null or Boolean). You can check for scalar documents with the method `scalar()`. You can cast a document that is either an array or an object to an `ondemand::value` instance immediately after you create the document instance: you cannot create a `ondemand::value` instance from a document that has already been accessed as it would mean that you would have two instances of the object or array simultaneously (see [rewinding](#rewinding)). You can query the type of a document or a value with the `type()` method. The `type()` method does not consume or validate documents and values, but it tells you whether they are
+  `ondemand::value` instances: it can represent anything except a scalar document (lone number, string, null or Boolean). You can check for scalar documents with the method `scalar()`. You can cast a document that is either an array or an object to an `ondemand::value` instance immediately after you create the document instance: you cannot create an `ondemand::value` instance from a document that has already been accessed as it would mean that you would have two instances of the object or array simultaneously (see [rewinding](#rewinding)). You can query the type of a document or a value with the `type()` method. The `type()` method does not consume or validate documents and values, but it tells you whether they are
   - arrays (`json_type::array`),
   - objects (`json_type::object`)
   - numbers (`json_type::number`),
@@ -554,7 +569,7 @@ support for users who avoid exceptions. See [the simdjson error handling documen
   - null (`json_type::null`).
 
   You must still validate and consume the values (e.g., call `is_null()`) after calling `type()`.
-   You may also access [raw strings](#raw-strings).
+   You may also access [the raw JSON string](#general-direct-access-to-the-raw-json-string).
   For example, the following is a quick and dirty recursive function that verbosely prints the JSON document as JSON. This example also illustrates lifecycle requirements: the `document` instance holds the iterator. The document must remain in scope while you are accessing instances of `value`, `object` and `array`.
   ```c++
   void recursive_print_json(ondemand::value element) {
@@ -584,6 +599,9 @@ support for users who avoid exceptions. See [the simdjson error handling documen
         // key() returns the key as it appears in the raw
         // JSON document, if we want the unescaped key,
         // we should do field.unescaped_key().
+        // We could also use field.escaped_key() if we want
+        // a std::string_view instance, but we do not need
+        // escaping.
         cout << "\"" << field.key() << "\": ";
         recursive_print_json(field.value());
         add_comma = true;
@@ -688,6 +706,8 @@ ondemand::document doc = parser.iterate(cars_json);
 for (ondemand::field key_car : doc.get_object()) {
   // If I need a string_view and/or, I can use key_car.unescaped_key() instead, but
   // key_car.key() will be more performant otherwise.
+  // If we want a std::string_view instance but we do not care about escaping, we
+  // can also use key_car.escaped_key().
   cout << "identifier : " << key_car.key() << std::endl;
   // I can now access the subobject:
   ondemand::object car = key_car.value();
@@ -738,6 +758,289 @@ for (ondemand::object points : parser.iterate(points_json)) {
 }
 ```
 
+
+Adding support for custom types
+----------------------
+
+Suppose you have your own types, such as a `Car` struct:
+
+```C++
+struct Car {
+  std::string make;
+  std::string model;
+  int64_t year;
+  std::vector<double> tire_pressure;
+};
+```
+
+You might want to write code that automatically parses the JSON content to your custom
+type:
+
+```C++
+  padded_string json = R"( [ { "make": "Toyota", "model": "Camry",  "year": 2018,
+       "tire_pressure": [ 40.1, 39.9 ] },
+  { "make": "Kia",    "model": "Soul",   "year": 2012,
+       "tire_pressure": [ 30.1, 31.0 ] },
+  { "make": "Toyota", "model": "Tercel", "year": 1999,
+       "tire_pressure": [ 29.8, 30.0 ] }
+])"_padded;
+
+
+  ondemand::parser parser;
+  ondemand::document doc = parser.iterate(json);
+  for (auto val : doc) {
+    Car c(val);
+    std::cout << c.make << std::endl;
+  }
+```
+
+We may do so by providing additional template definitions to the `ondemand::value` type.
+We may start by providing a definition for `std::vector<double>` as follows:
+
+```c++
+template <>
+simdjson_inline simdjson_result<std::vector<double>>
+simdjson::ondemand::value::get() noexcept {
+  ondemand::array array;
+  auto error = get_array().get(array);
+  if (error) { return error; }
+  std::vector<double> vec;
+  for (auto v : array) {
+    double val;
+    error = v.get_double().get(val);
+    if (error) { return error; }
+    vec.push_back(val);
+  }
+  return vec;
+}
+```
+
+We may then provide support for our `Car`` struct:
+
+```C++
+template <>
+simdjson_inline simdjson_result<Car> simdjson::ondemand::value::get() noexcept {
+  ondemand::object obj;
+  auto error = get_object().get(obj);
+  if (error) { return error; }
+  Car car;
+  // Instead of repeatedly obj["something"], we iterate through the object which
+  // we expect to be faster.
+  for (auto field : obj) {
+    raw_json_string key;
+    error = field.key().get(key);
+    if (error) { return error; }
+    if (key == "make") {
+      error = field.value().get_string(car.make);
+      if (error) { return error; }
+    } else if (key == "model") {
+      error = field.value().get_string(car.model);
+      if (error) { return error; }
+    } else if (key == "year") {
+      error = field.value().get_int64().get(car.year);
+      if (error) { return error; }
+    } else if (key == "tire_pressure") {
+      error = field.value().get<std::vector<double>>().get(car.tire_pressure);
+      if (auto  error) { return error; }
+    }
+  }
+  return car;
+}
+```
+
+And that is all that is needed! The following code is a complete example:
+
+```c++
+#include "simdjson.h"
+#include <iostream>
+#include <vector>
+
+using namespace simdjson;
+
+/**
+ * A custom type that we want to parse.
+ */
+struct Car {
+  std::string make;
+  std::string model;
+  int64_t year;
+  std::vector<double> tire_pressure;
+};
+
+template <>
+simdjson_inline simdjson_result<std::vector<double>>
+simdjson::ondemand::value::get() noexcept {
+  ondemand::array array;
+  auto error = get_array().get(array);
+  if (error) { return error; }
+  std::vector<double> vec;
+  for (auto v : array) {
+    double val;
+    error = v.get_double().get(val);
+    if (error) { return error; }
+    vec.push_back(val);
+  }
+  return vec;
+}
+
+
+template <>
+simdjson_inline simdjson_result<Car> simdjson::ondemand::value::get() noexcept {
+  ondemand::object obj;
+  auto error = get_object().get(obj);
+  if (error) { return error; }
+  Car car;
+  // Instead of repeatedly obj["something"], we iterate through the object which
+  // we expect to be faster.
+  for (auto field : obj) {
+    raw_json_string key;
+    error = field.key().get(key);
+    if (error) { return error; }
+    if (key == "make") {
+      error = field.value().get_string(car.make);
+      if (error) { return error; }
+    } else if (key == "model") {
+      error = field.value().get_string(car.model);
+      if (error) { return error; }
+    } else if (key == "year") {
+      error = field.value().get_int64().get(car.year);
+      if (error) { return error; }
+    } else if (key == "tire_pressure") {
+      error = field.value().get<std::vector<double>>().get(car.tire_pressure);
+      if (error) { return error; }
+    }
+  }
+  return car;
+}
+
+int main(void) {
+  padded_string json = R"( [ { "make": "Toyota", "model": "Camry",  "year": 2018,
+       "tire_pressure": [ 40.1, 39.9 ] },
+  { "make": "Kia",    "model": "Soul",   "year": 2012,
+       "tire_pressure": [ 30.1, 31.0 ] },
+  { "make": "Toyota", "model": "Tercel", "year": 1999,
+       "tire_pressure": [ 29.8, 30.0 ] }
+])"_padded;
+  ondemand::parser parser;
+  ondemand::document doc = parser.iterate(json);
+  for (auto val : doc) {
+    Car c(val);
+    std::cout << c.make << std::endl;
+  }
+  direct();
+  return EXIT_SUCCESS;
+}
+```
+
+Observe that we require an explicit cast (`Car c(val)` instead of `for (Car c : doc) {`): it is by design.
+
+If you prefer to avoid exceptions, you may modify the `main` function as follows:
+
+```c++
+int main(void) {
+  padded_string json = R"( [ { "make": "Toyota", "model": "Camry",  "year": 2018,
+       "tire_pressure": [ 40.1, 39.9 ] },
+  { "make": "Kia",    "model": "Soul",   "year": 2012,
+       "tire_pressure": [ 30.1, 31.0 ] },
+  { "make": "Toyota", "model": "Tercel", "year": 1999,
+       "tire_pressure": [ 29.8, 30.0 ] }
+])"_padded;
+  ondemand::parser parser;
+  ondemand::document doc;
+  auto error = parser.iterate(json).get(doc);
+  if (error) { std::cerr << error << std::endl; return EXIT_FAILURE; }
+  for (auto val : doc) {
+    Car c;
+    error = val.get<Car>().get(c);
+    if (error) { std::cerr << error << std::endl; return EXIT_FAILURE; }
+    std::cout << c.make << std::endl;
+  }
+  return EXIT_SUCCESS;
+}
+```
+
+Our example is limited to `ondemand::value` instances. If you wish to also be able to map
+directly the document instance itself to a custom type, you need to provide the definitions to
+the `ondemand::document` type. In this instance, we must replace the function with signature
+`simdjson_result<Car> simdjson::ondemand::value::get()` with a function having signature
+`simdjson_result<Car> simdjson::ondemand::document::get() &`. The following is a complete
+example:
+
+```C++
+#include "simdjson.h"
+#include <iostream>
+#include <vector>
+
+using namespace simdjson;
+
+/**
+ * A custom type that we want to parse.
+ */
+struct Car {
+  std::string make;
+  std::string model;
+  int64_t year;
+  std::vector<double> tire_pressure;
+};
+
+template <>
+simdjson_inline simdjson_result<std::vector<double>>
+simdjson::ondemand::value::get() noexcept {
+  ondemand::array array;
+  if (auto error = get_array().get(array); error) { return error; }
+  std::vector<double> vec;
+  for (auto v : array) {
+    double val;
+    if (auto error = v.get_double().get(val); error) { return error; }
+    vec.push_back(val);
+  }
+  return vec;
+}
+
+
+template <>
+simdjson_inline simdjson_result<Car> simdjson::ondemand::document::get() & noexcept {
+  ondemand::object obj;
+  auto error = get_object().get(obj);
+  if (error) {
+    return error;
+  }
+  Car car;
+  // Instead of repeatedly obj["something"], we iterate through the object which
+  // we expect to be faster.
+  for (auto field : obj) {
+    raw_json_string key;
+    error = field.key().get(key);
+    if (error) { return error; }
+    if (key == "make") {
+      error = field.value().get_string(car.make);
+      if (error) { return error; }
+    } else if (key == "model") {
+      error = field.value().get_string(car.model);
+      if (error) { return error; }
+    } else if (key == "year") {
+      error = field.value().get_int64().get(car.year);
+      if (error) { return error; }
+    } else if (key == "tire_pressure") {
+      error = field.value().get<std::vector<double>>().get(car.tire_pressure);
+      if (error) { return error; }
+    }
+  }
+  return car;
+}
+
+int main(void) {
+  padded_string json = R"( { "make": "Toyota", "model": "Camry",  "year": 2018,
+       "tire_pressure": [ 40.1, 39.9 ] } )"_padded;
+  ondemand::parser parser;
+  ondemand::document doc = parser.iterate(json);
+  Car c(doc);
+  std::cout << c.make << std::endl;
+  return EXIT_SUCCESS;
+}
+```
+
+
 Minifying JSON strings without parsing
 ----------------------
 
@@ -795,10 +1098,10 @@ auto cars = parser.iterate(cars_json);
 cout << cars.at_pointer("/0/tire_pressure/1") << endl; // Prints 39.9
 ```
 
-A JSON Path is a sequence of segments each starting with the '/' character. Within arrays, an integer
+A JSON Pointer path is a sequence of segments each starting with the '/' character. Within arrays, a zero-based integer
 index allows you to select the indexed node. Within objects, the string value of the key allows you to
 select the value. If your keys contain the characters '/' or '~', they must be escaped as '~1' and
-'~0' respectively. An empty JSON Path refers to the whole document.
+'~0' respectively. An empty JSON Pointer Path refers to the whole document.
 
 For multiple JSON pointer queries on a document, one can call `at_pointer` multiple times.
 
@@ -819,6 +1122,17 @@ for (size_t i = 0; i < size; i++) {
 }
 ```
 
+In most instances, a JSON Pointer is an ASCII string and the keys in a JSON document
+are ASCII strings. We support UTF-8 in JSON Pointer, but key values are matched exactly, without unescaping or Unicode normalization. We do a byte-by-byte comparison. The e acute character is
+considered distinct from its escaped version `\u00E9`. E.g.,
+
+```c++
+const padded_string json = "{\"\\u00E9\":123}"_padded;
+auto doc = parser.iterate(json);
+doc.at_pointer("/\\u00E9") == 123; // true
+doc.at_pointer((const char*)u8"/\u00E9") // returns an error (NO_SUCH_FIELD)
+```
+
 Note that `at_pointer` calls [`rewind`](#rewind) to reset the parser at the beginning of the document. Hence, it invalidates all previously parsed values, objects and arrays: make sure to consume the values between each call to  `at_pointer`. Consider the following example where one wants to store each object from the JSON into a vector of `struct car_type`:
 
 ```c++
@@ -878,9 +1192,55 @@ doc.rewind();	// Need to manually rewind to be able to use find_field properly f
 std::cout << doc.find_field("k0") << std::endl; // Prints 27
 ```
 
-When the JSON path is the empty string (`""`) applied to a scalar document (lone string, number, Boolean or null), a SCALAR_DOCUMENT_AS_VALUE error is returned because scalar document cannot
+When the JSON Pointer Path is the empty string (`""`) applied to a scalar document (lone string, number, Boolean or null), a SCALAR_DOCUMENT_AS_VALUE error is returned because scalar document cannot
 be represented as `value` instances. You can check that a document is a scalar with the method `scalar()`.
 
+JSONPath
+------------
+
+The simdjson library now supports a subset of [JSONPath](https://datatracker.ietf.org/doc/html/draft-normington-jsonpath-00) through the `at_path()` method, allowing you to reach further into the document in a single call. The subset of JSONPath that is implemented is the subset that is trivially convertible into the JSON Pointer format, using `.` to access a field and `[]` to access a specific index.
+
+This implementation relies on `at_path()` converting its argument to JSON Pointer and then calling `at_pointer`, which makes use of [`rewind`](#rewind) to reset the parser at the beginning of the document. Hence, it invalidates all previously parsed values, objects and arrays: make sure to consume the values between each call to `at_path`.
+
+Consider the following example:
+
+```c++
+auto cars_json = R"( [
+  { "make": "Toyota", "model": "Camry",  "year": 2018, "tire_pressure": [ 40.1, 39.9, 37.7, 40.4 ] },
+  { "make": "Kia",    "model": "Soul",   "year": 2012, "tire_pressure": [ 30.1, 31.0, 28.6, 28.7 ] },
+  { "make": "Toyota", "model": "Tercel", "year": 1999, "tire_pressure": [ 29.8, 30.0, 30.2, 30.5 ] }
+] )"_padded;
+ondemand::parser parser;
+auto cars = parser.iterate(cars_json);
+cout << cars.at_path("[0].tire_pressure[1]") << endl; // Prints 39.9
+```
+
+A call to `at_path(json_path)` can result in any of the errors that are returned by the `at_pointer` method and if the conversion of `json_path` to JSON Pointer fails, it will lead to an `simdjson::INVALID_JSON_POINTER`error.
+
+```c++
+auto cars_json = R"( [
+  { "make": "Toyota", "model": "Camry",  "year": 2018, "tire_pressure": [ 40.1, 39.9, 37.7, 40.4 ] },
+  { "make": "Kia",    "model": "Soul",   "year": 2012, "tire_pressure": [ 30.1, 31.0, 28.6, 28.7 ] },
+  { "make": "Toyota", "model": "Tercel", "year": 1999, "tire_pressure": [ 29.8, 30.0, 30.2, 30.5 ] }
+] )"_padded;
+ondemand::parser parser;
+auto cars = parser.iterate(cars_json);
+ASSERT_ERROR(cars.at_path("[0].tire_presure[1").get(x), INVALID_JSON_POINTER); // Fails on conversion to JSON Pointer, since last square bracket was not properly closed.
+ASSERT_ERROR(cars.at_path("[0].incorrect_field[1]").get(x), NO_SUCH_FIELD); // Conversion to JSON Pointer succeeds, but fails on at_pointer() since the path is invalid.
+```
+
+In most instances, a JSONPath is an ASCII string and the keys in a JSON document
+are ASCII strings. We support UTF-8 within a JSONPath expression, but key values are
+matched exactly, without unescaping or Unicode normalization. We do a byte-by-byte comparison.
+The e acute character is considered distinct from its escaped version `\u00E9`. E.g.,
+
+```c++
+const padded_string json = "{\"\\u00E9\":123}"_padded;
+auto doc = parser.iterate(json);
+doc.at_path(".\\u00E9") == 123; // true
+doc.at_path((const char*)u8".\u00E9") // returns an error (NO_SUCH_FIELD)
+```
+
 Error Handling
 --------------
 
@@ -1115,7 +1475,7 @@ having to handle exceptions.
   error = doc.get_object().get(object);
   if (error) { return false; }
   for(auto field : object) {
-    // We could replace 'field.key() with field.unescaped_key(),
+    // We could replace 'field.key() with field.unescaped_key() or field.escaped_key(),
     // and ondemand::raw_json_string by std::string_view.
     ondemand::raw_json_string keyv;
     error = field.key().get(keyv);
@@ -1534,7 +1894,7 @@ if (error) {
 }
 ```
 It is also important to note that when dealing an invalid number inside a string, simdjson will report a `NUMBER_ERROR` error if the string begins with a number whereas simdjson
-will report a `INCORRECT_TYPE` error otherwise.
+will report an `INCORRECT_TYPE` error otherwise.
 
 The `*_in_string` methods can also be called on a single document instance:
 e.g., when your document consist solely of a quoted number.
@@ -1567,8 +1927,10 @@ An `ondemand::number` instance may contain an integer value or a floating-point
 Thus it is a dynamically typed number. Before accessing the value, you must determine the detected type:
 
 * `number.get_number_type()` has value `number_type::signed_integer` if we have a integer in [-9223372036854775808,9223372036854775808). You can recover the value by the `get_int64()` method applied on the `ondemand::number` instance. When `number.get_number_type()` has value `number_type::signed_integer`, you also have that `number.is_int64()` is true. Calling `get_int64()` on the `ondemand::number` instance when `number.get_number_type()` is not `number_type::signed_integer` is unsafe. You may replace `get_int64()` by a cast to a `int64_t` value.
-* `number.get_number_type()` has value `number_type::unsigned_integer` if we have a integer in [9223372036854775808,18446744073709551616). You can recover the value by the `get_uint64()` method applied on the `ondemand::number` instance.  When `number.get_number_type()` has value `number_type::unsigned_integer`, you also have that `number.is_uint64()` is true.  Calling `get_uint64()` on the `ondemand::number` instance when `number.get_number_type()` is not `number_type::unsigned_integer` is unsafe. You may replace `get_uint64()` by a cast to a `uint64_t` value.
+* `number.get_number_type()` has value `number_type::unsigned_integer` if we have a integer in `[9223372036854775808,18446744073709551616)`. You can recover the value by the `get_uint64()` method applied on the `ondemand::number` instance.  When `number.get_number_type()` has value `number_type::unsigned_integer`, you also have that `number.is_uint64()` is true.  Calling `get_uint64()` on the `ondemand::number` instance when `number.get_number_type()` is not `number_type::unsigned_integer` is unsafe. You may replace `get_uint64()` by a cast to a `uint64_t` value.
 * `number.get_number_type()` has value `number_type::floating_point_number` if we have and we have a floating-point (binary64) number. You can recover the value by the `get_double()` method applied on the `ondemand::number` instance.  When `number.get_number_type()` has value `number_type::floating_point_number`, you also have that `number.is_double()` is true.  Calling `get_double()` on the `ondemand::number` instance when `number.get_number_type()` is not `number_type::floating_point_number` is unsafe. You may replace `get_double()` by a cast to a `double` value.
+* When the value is an integer outside of the valid ranges for a 64-bit integers, e.g., when it is smaller than -9223372036854775808 or larger than 18446744073709551615, then `number.get_number_type()` has value `number_type::big_integer`. If you try to parse
+such a number of `get_number()`, you get the error `BIGINT_ERROR`. You can access the underlying string of digits with the function `raw_json_token()` which returns a `std::string_view` instance starting at the beginning of the digit. You can also call `get_double()` to get a floating-point approximation.
 
 
 You must check the type before accessing the value: it is an error to call `get_int64()` when `number.get_number_type()` is not `number_type::signed_integer` and when `number.is_int64()` is false. You are responsible for this check as the user of the library.
@@ -1601,6 +1963,9 @@ Consider the following example:
           std::cout  << "float: " << double(num) << " ";
           std::cout << "float: " << num.get_double() << std::endl;
           break;
+        case ondemand::number_type::big_integer:
+          std::cout  << "big-integer: " << val.raw_json_token() << std::endl;
+          break;
       }
     }
 ```
@@ -1616,7 +1981,56 @@ It will output:
 9999999999999999999 negative: 0 is_integer: 1 large 64-bit integer: 9999999999999999999 large 64-bit integer: 9999999999999999999
 ```
 
-Raw Strings
+In the following example, we have an array of integers that are outside the valid range of 64-bit signed or
+unsigned integers. Calling `get_number_type()` on the values returns `ondemand::number_type::big_integer`.
+You can try to represent these big integers as 64-bit floating-point numbers, though you typically lose
+precision in the process (as illustrated in the example).
+
+```C++
+  ondemand::parser parser;
+  padded_string docdata = R"([-9223372036854775809, 18446744073709551617, 99999999999999999999999 ])"_padded;
+  double dexpected[] = {-9223372036854775808.0, 18446744073709551616.0, 1e23};
+  ondemand::document doc = parser.iterate(docdata);
+  ondemand::array arr = doc.get_array();
+  for(ondemand::value val : arr) {
+    if(val.get_number_type() == ondemand::number_type::big_integer) {
+      std::cout << val.get_double() << std::endl;
+      // might print -9.22337e+18, 1.84467e+19, 1e+23
+    }
+  }
+```
+This program might print:
+```
+-9.22337e+18
+1.84467e+19
+1e+23
+```
+
+You may get access to the underlying string representing the big integer with
+`raw_json_token()` and you may parse the resulting number strings using your own parser.
+
+```c++
+  ondemand::parser parser;
+  padded_string docdata = R"([-9223372036854775809, 18446744073709551617, 99999999999999999999999 ])"_padded;
+  ondemand::document doc = parser.iterate(docdata);
+  ondemand::array arr = doc.get_array();
+  for(ondemand::value val : arr) {
+    // val.get_number_type() == ondemand::number_type::big_integer
+    if(val.get_number_type() == ondemand::number_type::big_integer) {
+      std::string_view token = val.raw_json_token();
+      // token = "-9223372036854775809", "18446744073709551617", "99999999999999999999999 "
+      std::cout << "'" << token << "'" << std::endl;
+    }
+  }
+```
+This code prints the following:
+```
+'-9223372036854775809'
+'18446744073709551617'
+'99999999999999999999999 '
+```
+
+Raw Strings From Keys
 -----------
 
 It is sometimes useful to have access to a raw (unescaped) string: we make available a
@@ -1624,7 +2038,7 @@ minimalist `raw_json_string` data type which contains a pointer inside the strin
 original document, right after the quote. It is accessible via `get_raw_json_string()` on a
 string instance and returned by the `key()` method on an object's field instance. It is always
 optional: replacing `get_raw_json_string()` with `get_string()` and `key()` by
-`unescaped_key()` returns an `string_view` instance of the unescaped string.
+`unescaped_key()` or `escaped_key()` returns an `string_view` instance of the unescaped/unprocessed string.
 
 You can quickly compare a `raw_json_string` instance with a target string. You may also
 unescape  the `raw_json_string` on your own string buffer: `parser.unescape(mystr, ptr)`
@@ -1652,12 +2066,27 @@ JSON string to a user-provided buffer:
     }
 ```
 
+Some users might prefer to have a direct access to a `std::string_view` instance
+pointing inside the source document. The `key_raw_json_token()` method serves this
+purpose. It provides a view on the key, including the starting quote character,
+and everything up to the next `:` character after the final quote character. E.g.,
+if the key is `"name"` then `key_raw_json_token()` returns a `std::string_view`  which
+begins with `"name"` and may containing trailing white-space characters.
+```C++
+  auto json = R"( {"name" : "Jack The Ripper \u0033"} )"_padded;
+  ondemand::parser parser;
+  ondemand::document doc = parser.iterate(json);
+  for (auto key_value : doc.get_object()) {
+    std::string_view keysv = key_value.key_raw_json_token(); // keysv is "\"name\" "
+  }
+```
+
 
 General Direct Access to the Raw JSON String
 --------------------------------
-If your value is a string, the `raw_json_string` you with `get_raw_json_string()` gives you direct access to the unprocessed
-string. The simdjson library allows you to have access to the raw underlying JSON
-more generally.
+If your value is a string, the `raw_json_string` you get with `get_raw_json_string()` gives you direct access to the unprocessed
+string. But the simdjson library allows you to have access to the raw underlying JSON
+more generally, not just for strings.
 
 The simdjson library makes explicit assumptions about types. For examples, numbers
 must be integers (up to 64-bit integers) or binary64 floating-point numbers. Some users
@@ -1690,6 +2119,13 @@ string_view token = obj["value"].raw_json_token();
 
 The `raw_json_token()` should be fast and free of allocation.
 
+Given a quote-deliminated string, you find the string sequence inside the quote with a
+single line of code:
+
+```C++
+std::string_view noquote(std::string_view v) { return {v.data()+1, v.find_last_of('"')-1}; }
+```
+
 If your value is an array or an object, `raw_json_token()` returns effectively a single
 character (`[`) or (`}`) which is not very useful. For arrays and objects, we have another
 method called `raw_json()` which consumes (traverses) the array or the object.
@@ -1758,9 +2194,9 @@ Storing Directly into an Existing String Instance
 
 The simdjson library favours  the use of `std::string_view` instances because
 it tends to lead to better performance due to causing fewer memory allocations.
-However, they are cases where you need to store a string result in an `std::string``
+However, they are cases where you need to store a string result in a `std::string``
 instance. You can do so with a templated version of the `to_string()` method which takes as
-a parameter a reference to an `std::string`.
+a parameter a reference to a `std::string`.
 
 ```C++
   auto json = R"({
@@ -1778,14 +2214,14 @@ The same routine can be written without exceptions handling:
 ```C++
   std::string name;
   auto err = doc["name"].get_string(name);
-  if(err) { /* handle error */ }
+  if (err) { /* handle error */ }
 ```
 
 The `std::string` instance, once created, is independent. Unlike our `std::string_view` instances,
 it does not point at data that is within our `parser` instance. The same caveat applies: you should
 only consume a JSON string once.
 
-Because `get_string()` is a template that requires a type that can be assigned an `std::string`, you
+Because `get_string()` is a template that requires a type that can be assigned a `std::string`, you
 can use it with features such as `std::optional`:
 
 ```C++
@@ -1793,7 +2229,7 @@ can use it with features such as `std::optional`:
   ondemand::parser parser;
   ondemand::document doc = parser.iterate(json);
   std::optional<std::string> value;
-  if(doc["foo1"].get_string(value)) { /* error */ }
+  if (doc["foo1"].get_string(value)) { /* error */ }
   // value was populated with "3.1416"
 ```
 
@@ -2001,7 +2437,7 @@ bool example() {
   ondemand::document doc = parser.iterate(json);
   ondemand::object root_object = doc.get_object();
   for(auto key_value : root_object) {
-    // could get std::string_view with 'unescaped_key()':
+    // could get std::string_view with 'unescaped_key()' or 'escaped_key()':
     std::cout << "key: " << key_value.key() << std::endl;
     ondemand::object obj = key_value.value();
 
@@ -2074,6 +2510,8 @@ bool example() {
       std::cout << "\n\ntop level:" << field.key() << std::endl;
       // You can get a proper std::string_view for the key with:
       // std::string_view key = field.unescaped_key();
+      // or
+      // std::string_view key = field.escaped_key();
       // and second for-range loop to get child-elements here
       for (ondemand::object inner_object : field.value()) {
         auto i = inner_object.begin();
@@ -2087,6 +2525,9 @@ bool example() {
                       << "\" : " << inner_field.value() << ", ";
             // You can get proper std::string_view for the key and value with:
             // std::string_view inner_key = field.unescaped_key();
+            // or
+            // std::string_view inner_key = field.escaped_key();
+            // and
             // std::string_view value_str = field.value();
           }
         }
@@ -2100,7 +2541,29 @@ bool example() {
 }
 ```
 
+* Example 4: Passing an array to a function
 
+```C++
+
+#include "simdjson.h"
+#include <iostream>
+
+// prints the content of the array as hexadecimal 64-bit integers
+void f(simdjson::ondemand::array v) {
+  for(uint64_t val : v) {
+    std::cout << "0x" << std::hex << val << std::endl;
+  }
+}
+
+
+int main(void) {
+  simdjson::padded_string json = R"( [ 897314173811950000, 3122321 ])"_padded;
+  simdjson::ondemand::parser parser;
+  simdjson::ondemand::document doc = parser.iterate(json);
+  f(doc.get_array());
+  return EXIT_SUCCESS;
+}
+```
 
 Performance Tips
 --------
@@ -2108,7 +2571,7 @@ Performance Tips
 
 - The On Demand front-end works best when doing a single pass over the input: avoid calling `count_elements`, `rewind` and similar methods.
 - If you are familiar with assembly language, you may use the online tool godbolt to explore the compiled code. The following example may work: [https://godbolt.org/z/xE4GWs573](https://godbolt.org/z/xE4GWs573).
-- Given a field `field` in an object, calling `field.key()` is often faster than `field.unescaped_key()` so if you do not need an unescaped `std::string_view` instance, prefer `field.key()`.
+- Given a field `field` in an object, calling `field.key()` is often faster than `field.unescaped_key()` so if you do not need an unescaped `std::string_view` instance, prefer `field.key()`. Similarly, we expect `field.escaped_key()` to be faster than `field.unescaped_key()` even though both return a `std::string_view` instance.
 - For release builds, we recommend setting `NDEBUG` pre-processor directive when compiling the `simdjson` library. Importantly, using the optimization flags `-O2` or `-O3` under GCC and LLVM clang does not set the `NDEBUG` directive, you must set it manually (e.g., `-DNDEBUG`).
 - For long streams of JSON documents, consider [`iterate_many`](iterate_many.md) and [`parse_many`](parse_many.md) for better performance.
 - Never seek to access a field twice (e.g., o["data"] and later again o["data"]). Instead capture once an ondemand::value and reuse it.
@@ -2127,3 +2590,9 @@ Performance Tips
 	std::string_view rating = data["rating"];
   ```
 - To better understand the operation of your On Demand parser, and whether it is performing as well as you think it should be, there is a  logger feature built in to simdjson! To use it, define the pre-processor directive `SIMDJSON_VERBOSE_LOGGING` prior to including the `simdjson.h` header, which enables logging in simdjson. Run your code. It may generate a lot of logging output; adding printouts from your application that show each section may be helpful. The log's output will show step-by-step information on state, buffer pointer position, depth, and key retrieval status. Importantly, unless `SIMDJSON_VERBOSE_LOGGING` is defined, logging is entirely disabled and thus carries no overhead.
+
+Further reading
+--------
+
+
+- John Keiser, Daniel Lemire, [On-Demand JSON: A Better Way to Parse Documents?](http://arxiv.org/abs/2312.17149), Software: Practice and Experience (to appear)

doc/dom.md

@@ -71,6 +71,12 @@ For best performance, a `parser` instance should be reused over several files: o
 If you need a lower-level interface, you may call the function `parser.parse(const char * p, size_t l)` on a pointer `p` while specifying the
 length of your input `l` in bytes. To see how to get the very best performance from a low-level approach, you way want to read our [performance notes](https://github.com/simdjson/simdjson/blob/master/doc/performance.md#padding-and-temporary-copies) on this topic (see the Padding and Temporary Copies section).
 
+*Windows-specific*:  Windows users who need to read files with
+non-ANSI characters in the name should set their code page to
+UTF-8 (65001). This should be the default with Windows 11 and better.
+Further, they may use the AreFileApisANSI function to determine whether
+the filename is interpreted using the ANSI or the system default OEM
+codepage, and they may call SetFileApisToOEM accordingly.
 
 Using the Parsed JSON
 ---------------------
@@ -223,13 +229,13 @@ dom::element cars = parser.parse(cars_json);
 cout << cars.at_pointer("/0/tire_pressure/1") << endl; // Prints 39.9
 ```
 
-A JSON Path is a sequence of segments each starting with the '/' character. Within arrays, an integer
+A JSON Pointer expression is a sequence of segments each starting with the '/' character. Within arrays, an integer
 index allows you to select the indexed node. Within objects, the string value of the key allows you to
 select the value. If your keys contain the characters '/' or '~', they must be escaped as '~1' and
-'~0' respectively. An empty JSON Path refers to the whole document.
+'~0' respectively. An empty JSON Pointer expression refers to the whole document.
 
 We also extend the JSON Pointer support to include *relative* paths.
-You can apply a JSON path to any node and the path gets interpreted relatively, as if the current node were a whole JSON document.
+You can apply a JSON Pointer expression to any node and the path gets interpreted relatively, as if the current node were a whole JSON document.
 
 Consider the following example:
 

doc/implementation-selection.md

@@ -11,27 +11,31 @@ CPU Architecture-Specific Implementations
 Overview
 --------
 
+
+
 The simdjson library takes advantage of SIMD instruction sets such as NEON, SSE and AVX to achieve
 much of its speed. Because these instruction sets work differently, simdjson has to compile a
 different version of the JSON parser for different CPU architectures, often with different
 algorithms to take better advantage of a given CPU!
 
 The current implementations are:
-* icelake: AVX-512F, AVX-512VBMI, etc.
-* haswell: AVX2 (2013 Intel Haswell or later)
+* icelake: AVX-512F, AVX-512_VBMI, AVX-512_VBMI2, AVX-512_DQ, AVX-512512_CD, AVX-512_BW, AVX-512_VL (2019 Intel Ice Lake, Intel Rocket Lake, Intel Sapphire Rapids, AMD Zen 4)
+* haswell: AVX2 (2013 Intel Haswell or later, all AMD Zen processors)
 * westmere: SSE4.2 (2010 Westmere or later).
 * arm64: 64-bit ARMv8-A NEON
-* ppc64: 64-bit POWER8 and POWER9 with VSX and ALTIVEC extensions. Both big endian and little endian are implemented, depends on the compiler you are using. The library is tested on recent, little-endian, POWER systems.
+* ppc64: 64-bit POWER8 and POWER9 with VSX and ALTIVEC extensions. Both big endian and little endian are implemented, depending on the compiler you are using. The library is tested on recent, little-endian, POWER systems.
+* lasx: Loongson Advanced SIMD EXtension (LASX),  a 256-bit vector expansion for the LoongArch architecture.
+* lsx: Loongson SIMD EXtension (LSX),  a 128-bit vector expansion for the LoongArch architecture.
 * fallback: A generic implementation that runs on any 64-bit processor.
 
 In many cases, you don't know where your compiled binary is going to run, so simdjson automatically
 compiles *all* the implementations into the executable. On Intel, it will include 4 implementations
-(icelake, haswell, westmere and fallback), on ARM it will include 2 (arm64 and fallback), and on PPC
+(icelake, haswell, westmere and fallback), on 64-bit ARM it will include just one since running dispatching is  unnecessary, and on PPC
 it will include 2 (ppc64 and fallback).
 
 If you know more about where you're going to run and want to save the space, you can disable any of
 these implementations at compile time with `-DSIMDJSON_IMPLEMENTATION_X=0` (where X is ICELAKE, HASWELL,
-WESTMERE, ARM64, PPC64 and FALLBACK).
+WESTMERE, ARM64, PPC64, LSX, LASX and FALLBACK).
 
 The simdjson library automatically sets header flags for each implementation as it compiles; there
 is no need to set architecture-specific flags yourself (e.g., `-mavx2`, `/AVX2`  or
@@ -75,8 +79,7 @@ And look them up by name:
 ```c++
 cout << simdjson::get_available_implementations()["fallback"]->description() << endl;
 ```
-Though the fallback implementation should always be available, others might be missing. When
-an implementation is not available, the bracket call `simdjson::get_available_implementations()[name]`
+When an implementation is not available, the bracket call `simdjson::get_available_implementations()[name]`
 will return the null pointer.
 
 The available implementations have been compiled but may not necessarily be run safely on your system

doc/ondemand_design.md

@@ -686,7 +686,7 @@ in production systems:
     // if (std::string_view(c2["name"]) != "Daniel") { return false; }
 ```
 
-    A correct usage is given by the following example:
+A correct usage is given by the following example:
 
 ```C++
     ondemand::parser parser;
@@ -752,7 +752,7 @@ On relevant systems, the On Demand API provides some support for runtime dispatc
 
 Some users wish to run at the best possible speed. Under recent Intel and AMD processors, these users should take additional steps to verify that their code is well optimized.
 
-Given that the On Demand API offer limited runtime dispatching, it matters that your code is compiled against a specific CPU target. You should verify that the code is compiled against the target you expect. Thankfully, the simdjson library will tell you exactly what it detects as an implementation: `icelake` (AVX512 x64 processors), `haswell` (AVX2 x64 processors), `westmere` (SSE4 x64 processors), `arm64` (64-bit ARM), `ppc64` (64-bit POWER), `fallback` (others). Under x64 processors, many programmers will want to target `haswell` whereas under ARM, most programmers will want to target `arm64` (and it should do so automatically). The `fallback` is probably only good for testing purposes, not for deployment.
+Given that the On Demand API offer limited runtime dispatching, it matters that your code is compiled against a specific CPU target. You should verify that the code is compiled against the target you expect. Thankfully, the simdjson library will tell you exactly what it detects as an implementation: `icelake` (AVX512 x64 processors), `haswell` (AVX2 x64 processors), `westmere` (SSE4 x64 processors), `arm64` (64-bit ARM), `ppc64` (64-bit POWER), `lasx` (LoongArch), `lsx` (LoongArch),  `fallback` (others). Under x64 processors, many programmers will want to target `haswell` whereas under ARM, most programmers will want to target `arm64` (and it should do so automatically). The `fallback` is probably only good for testing purposes, not for deployment.
 
 ```C++
   std::cout << simdjson::builtin_implementation()->name() << std::endl;
@@ -779,4 +779,4 @@ Instead of specifying a specific microarchitecture, you can let your compiler do
 
 Passing `-march=native` to the compiler may make On Demand faster by allowing it to use optimizations specific to your machine. You cannot do this, however, if you are compiling code	that might be run on less advanced machines. That is, be mindful that when compiling with the `-march=native` flag, the resulting binary will run on the current system but may not run on other systems (e.g., on an old processor).
 
-If you are compiling on an ARM or POWER system, you do not need to be concerned with CPU selection during compilation. The `-march=native` flag useful for best performance on x64 (e.g., Intel) systems but it is generally unsupported on some platforms such as ARM (aarch64) or POWER.
+If you are compiling on an ARM or POWER system, you do not need to be concerned with CPU selection during compilation. The `-march=native` flag is useful for best performance on x64 (e.g., Intel) systems but it is generally unsupported on some platforms such as ARM (aarch64) or POWER.

doc/performance.md

@@ -159,7 +159,7 @@ When compiling with Visual Studio, we recommend the flags `/Ob2 /O2` or better.
 
 Recent versions of Microsoft Visual Studio on Windows provides support for the LLVM Clang compiler. You  only need to install the "Clang compiler" optional component (ClangCL). You may also get a copy of the 64-bit LLVM CLang compiler for [Windows directly from LLVM](https://releases.llvm.org/download.html). The simdjson library fully supports the LLVM Clang compiler under Windows. In fact, you may get better performance out of simdjson with the LLVM Clang compiler than with the regular Visual Studio compiler. Meanwhile the [LLVM CLang compiler is binary compatible with Visual Studio](https://clang.llvm.org/docs/MSVCCompatibility.html) which means that you can combine their binaries (executables and libraries).
 
-Under Windows, we also support the GNU GCC compiler via MSYS2. The performance of 64-bit MSYS2 under Windows excellent (on par with Linux).
+Under Windows, we also support the GNU GCC compiler via MSYS2. The performance of 64-bit MSYS2 under Windows is excellent (on par with Linux).
 
 
 Power Usage and Downclocking

doc/tape.md

@@ -29,7 +29,7 @@ It is sometimes useful to start with an example. Consider the following JSON doc
 The following is a dump of the content of the tape, with the first number of each line representing the index of a tape element.
 
 ### The Tape
-| index | element (64 bit word)                                               |
+| index | element (64-bit word)                                               |
 | ----- | ------------------------------------------------------------------- |
 | 0     | r	// pointing to 39 (right after last node)                         |
 | 1     | {	// pointing to next tape location 38 (first node after the scope) |

fuzz/build_fuzzer_variants.sh

@@ -78,7 +78,7 @@ fi
 # Different levels may uncover different types of bugs, see this interesting
 # thread: https://github.com/google/oss-fuzz/issues/2295#issuecomment-481493392
 # Oss-fuzz uses -O1 so it may be relevant to use something else than that,
-# to do something oss-fuzz doesn't.
+# to do something oss-fuzz does not do.
 variant=sanitizers-O3
 
     if [ ! -d build-$variant ] ; then

fuzz/fuzz_atpointer.cpp

@@ -7,11 +7,11 @@
 
 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
 
-  // Split data into two strings, json pointer and the document string.
+  // Split data into two strings, JSON Pointer and the document string.
   // Might end up with none, either or both being empty, important for
   // covering edge cases such as
   // https://github.com/simdjson/simdjson/issues/1142 Inputs missing the
-  // separator line will get an empty json pointer but the all the input put in
+  // separator line will get an empty JSON Pointer but the all the input put in
   // the document string. This means test data from other fuzzers that take json
   // input works for this fuzzer as well.
   FuzzData fd(Data, Size);

include/simdjson/builtin.h

@@ -20,6 +20,10 @@
 #include "simdjson/ppc64.h"
 #elif SIMDJSON_BUILTIN_IMPLEMENTATION_IS(westmere)
 #include "simdjson/westmere.h"
+#elif SIMDJSON_BUILTIN_IMPLEMENTATION_IS(lsx)
+#include "simdjson/lsx.h"
+#elif SIMDJSON_BUILTIN_IMPLEMENTATION_IS(lasx)
+#include "simdjson/lasx.h"
 #else
 #error Unknown SIMDJSON_BUILTIN_IMPLEMENTATION
 #endif

include/simdjson/builtin/base.h

@@ -17,6 +17,10 @@ namespace simdjson {
   namespace ppc64 {}
 #elif SIMDJSON_BUILTIN_IMPLEMENTATION_IS(westmere)
   namespace westmere {}
+#elif SIMDJSON_BUILTIN_IMPLEMENTATION_IS(lsx)
+  namespace lsx {}
+#elif SIMDJSON_BUILTIN_IMPLEMENTATION_IS(lasx)
+  namespace lasx {}
 #else
 #error Unknown SIMDJSON_BUILTIN_IMPLEMENTATION
 #endif

include/simdjson/builtin/implementation.h

@@ -19,6 +19,10 @@
 #include "simdjson/ppc64/implementation.h"
 #elif SIMDJSON_BUILTIN_IMPLEMENTATION_IS(westmere)
 #include "simdjson/westmere/implementation.h"
+#elif SIMDJSON_BUILTIN_IMPLEMENTATION_IS(lsx)
+#include "simdjson/lsx/implementation.h"
+#elif SIMDJSON_BUILTIN_IMPLEMENTATION_IS(lasx)
+#include "simdjson/lasx/implementation.h"
 #else
 #error Unknown SIMDJSON_BUILTIN_IMPLEMENTATION
 #endif

include/simdjson/builtin/ondemand.h

@@ -20,6 +20,10 @@
 #include "simdjson/ppc64/ondemand.h"
 #elif SIMDJSON_BUILTIN_IMPLEMENTATION_IS(westmere)
 #include "simdjson/westmere/ondemand.h"
+#elif SIMDJSON_BUILTIN_IMPLEMENTATION_IS(lsx)
+#include "simdjson/lsx/ondemand.h"
+#elif SIMDJSON_BUILTIN_IMPLEMENTATION_IS(lasx)
+#include "simdjson/lasx/ondemand.h"
 #else
 #error Unknown SIMDJSON_BUILTIN_IMPLEMENTATION
 #endif

include/simdjson/dom.h

@@ -10,18 +10,12 @@
 #include "simdjson/dom/parser.h"
 #include "simdjson/dom/serialization.h"
 
-// Deprecated API
-#include "simdjson/dom/jsonparser.h"
-#include "simdjson/dom/parsedjson.h"
-#include "simdjson/dom/parsedjson_iterator.h"
-
 // Inline functions
 #include "simdjson/dom/array-inl.h"
 #include "simdjson/dom/document_stream-inl.h"
 #include "simdjson/dom/document-inl.h"
 #include "simdjson/dom/element-inl.h"
 #include "simdjson/dom/object-inl.h"
-#include "simdjson/dom/parsedjson_iterator-inl.h"
 #include "simdjson/dom/parser-inl.h"
 #include "simdjson/internal/tape_ref-inl.h"
 #include "simdjson/dom/serialization-inl.h"

include/simdjson/dom/array.h

@@ -19,11 +19,14 @@ public:
   public:
     using value_type = element;
     using difference_type = std::ptrdiff_t;
+    using pointer = void;
+    using reference = value_type;
+    using iterator_category = std::forward_iterator_tag;
 
     /**
      * Get the actual value
      */
-    inline value_type operator*() const noexcept;
+    inline reference operator*() const noexcept;
     /**
      * Get the next value.
      *

include/simdjson/dom/element.h

@@ -214,7 +214,7 @@ public:
     static_assert(!sizeof(T), "The get method with given type is not implemented by the simdjson library. "
       "The supported types are Boolean (bool), numbers (double, uint64_t, int64_t), "
       "strings (std::string_view, const char *), arrays (dom::array) and objects (dom::object). "
-      "We recommand you use get_double(), get_bool(), get_uint64(), get_int64(), "
+      "We recommend you use get_double(), get_bool(), get_uint64(), get_int64(), "
       "get_object(), get_array() or get_string() instead of the get template.");
   }
 
@@ -293,7 +293,7 @@ public:
    *
    * @return The integer value.
    * @exception simdjson_error(INCORRECT_TYPE) if the JSON element is not an integer
-   * @exception simdjson_error(NUMBER_OUT_OF_RANGE) if the integer doesn't fit in 64 bits or is negative
+   * @exception simdjson_error(NUMBER_OUT_OF_RANGE) if the integer does not fit in 64 bits or is negative
    */
   inline operator uint64_t() const noexcept(false);
   /**
@@ -301,7 +301,7 @@ public:
    *
    * @return The integer value.
    * @exception simdjson_error(INCORRECT_TYPE) if the JSON element is not an integer
-   * @exception simdjson_error(NUMBER_OUT_OF_RANGE) if the integer doesn't fit in 64 bits
+   * @exception simdjson_error(NUMBER_OUT_OF_RANGE) if the integer does not fit in 64 bits
    */
   inline operator int64_t() const noexcept(false);
   /**
@@ -309,7 +309,6 @@ public:
    *
    * @return The double value.
    * @exception simdjson_error(INCORRECT_TYPE) if the JSON element is not a number
-   * @exception simdjson_error(NUMBER_OUT_OF_RANGE) if the integer doesn't fit in 64 bits or is negative
    */
   inline operator double() const noexcept(false);
   /**

include/simdjson/dom/jsonparser.h

@@ -1,121 +0,0 @@
-// TODO Remove this -- deprecated API and files
-
-#ifndef SIMDJSON_DOM_JSONPARSER_H
-#define SIMDJSON_DOM_JSONPARSER_H
-
-#include "simdjson/dom/base.h"
-#include "simdjson/dom/parser.h"
-#include "simdjson/dom/element.h"
-
-#include "simdjson/dom/parser-inl.h"
-
-namespace simdjson {
-
-//
-// C API (json_parse and build_parsed_json) declarations
-//
-
-#ifndef SIMDJSON_DISABLE_DEPRECATED_API
-[[deprecated("Use parser.parse() instead")]]
-inline int json_parse(const uint8_t *buf, size_t len, dom::parser &parser, bool realloc_if_needed = true) noexcept {
-  error_code code = parser.parse(buf, len, realloc_if_needed).error();
-  // The deprecated json_parse API is a signal that the user plans to *use* the error code / valid
-  // bits in the parser instead of heeding the result code. The normal parser unsets those in
-  // anticipation of making the error code ephemeral.
-  // Here we put the code back into the parser, until we've removed this method.
-  parser.valid = code == SUCCESS;
-  parser.error = code;
-  return code;
-}
-[[deprecated("Use parser.parse() instead")]]
-inline int json_parse(const char *buf, size_t len, dom::parser &parser, bool realloc_if_needed = true) noexcept {
-  error_code code = parser.parse(buf, len, realloc_if_needed).error();
-  // The deprecated json_parse API is a signal that the user plans to *use* the error code / valid
-  // bits in the parser instead of heeding the result code. The normal parser unsets those in
-  // anticipation of making the error code ephemeral.
-  // Here we put the code back into the parser, until we've removed this method.
-  parser.valid = code == SUCCESS;
-  parser.error = code;
-  return code;
-}
-[[deprecated("Use parser.parse() instead")]]
-inline int json_parse(const std::string &s, dom::parser &parser, bool realloc_if_needed = true) noexcept {
-  error_code code = parser.parse(s.data(), s.length(), realloc_if_needed).error();
-  // The deprecated json_parse API is a signal that the user plans to *use* the error code / valid
-  // bits in the parser instead of heeding the result code. The normal parser unsets those in
-  // anticipation of making the error code ephemeral.
-  // Here we put the code back into the parser, until we've removed this method.
-  parser.valid = code == SUCCESS;
-  parser.error = code;
-  return code;
-}
-[[deprecated("Use parser.parse() instead")]]
-inline int json_parse(const padded_string &s, dom::parser &parser) noexcept {
-  error_code code = parser.parse(s).error();
-  // The deprecated json_parse API is a signal that the user plans to *use* the error code / valid
-  // bits in the parser instead of heeding the result code. The normal parser unsets those in
-  // anticipation of making the error code ephemeral.
-  // Here we put the code back into the parser, until we've removed this method.
-  parser.valid = code == SUCCESS;
-  parser.error = code;
-  return code;
-}
-
-[[deprecated("Use parser.parse() instead")]]
-simdjson_warn_unused inline dom::parser build_parsed_json(const uint8_t *buf, size_t len, bool realloc_if_needed = true) noexcept {
-  dom::parser parser;
-  error_code code = parser.parse(buf, len, realloc_if_needed).error();
-  // The deprecated json_parse API is a signal that the user plans to *use* the error code / valid
-  // bits in the parser instead of heeding the result code. The normal parser unsets those in
-  // anticipation of making the error code ephemeral.
-  // Here we put the code back into the parser, until we've removed this method.
-  parser.valid = code == SUCCESS;
-  parser.error = code;
-  return parser;
-}
-[[deprecated("Use parser.parse() instead")]]
-simdjson_warn_unused inline dom::parser build_parsed_json(const char *buf, size_t len, bool realloc_if_needed = true) noexcept {
-  dom::parser parser;
-  error_code code = parser.parse(buf, len, realloc_if_needed).error();
-  // The deprecated json_parse API is a signal that the user plans to *use* the error code / valid
-  // bits in the parser instead of heeding the result code. The normal parser unsets those in
-  // anticipation of making the error code ephemeral.
-  // Here we put the code back into the parser, until we've removed this method.
-  parser.valid = code == SUCCESS;
-  parser.error = code;
-  return parser;
-}
-[[deprecated("Use parser.parse() instead")]]
-simdjson_warn_unused inline dom::parser build_parsed_json(const std::string &s, bool realloc_if_needed = true) noexcept {
-  dom::parser parser;
-  error_code code = parser.parse(s.data(), s.length(), realloc_if_needed).error();
-  // The deprecated json_parse API is a signal that the user plans to *use* the error code / valid
-  // bits in the parser instead of heeding the result code. The normal parser unsets those in
-  // anticipation of making the error code ephemeral.
-  // Here we put the code back into the parser, until we've removed this method.
-  parser.valid = code == SUCCESS;
-  parser.error = code;
-  return parser;
-}
-[[deprecated("Use parser.parse() instead")]]
-simdjson_warn_unused inline dom::parser build_parsed_json(const padded_string &s) noexcept {
-  dom::parser parser;
-  error_code code = parser.parse(s).error();
-  // The deprecated json_parse API is a signal that the user plans to *use* the error code / valid
-  // bits in the parser instead of heeding the result code. The normal parser unsets those in
-  // anticipation of making the error code ephemeral.
-  // Here we put the code back into the parser, until we've removed this method.
-  parser.valid = code == SUCCESS;
-  parser.error = code;
-  return parser;
-}
-#endif // SIMDJSON_DISABLE_DEPRECATED_API
-
-/** @private We do not want to allow implicit conversion from C string to std::string. */
-int json_parse(const char *buf, dom::parser &parser) noexcept = delete;
-/** @private We do not want to allow implicit conversion from C string to std::string. */
-dom::parser build_parsed_json(const char *buf) noexcept = delete;
-
-} // namespace simdjson
-
-#endif // SIMDJSON_DOM_JSONPARSER_H

include/simdjson/dom/object.h

@@ -18,13 +18,16 @@ public:
 
   class iterator {
   public:
-    using value_type = key_value_pair;
+    using value_type = const key_value_pair;
     using difference_type = std::ptrdiff_t;
+    using pointer = void;
+    using reference = value_type;
+    using iterator_category = std::forward_iterator_tag;
 
     /**
      * Get the actual key/value pair
      */
-    inline const value_type operator*() const noexcept;
+    inline reference operator*() const noexcept;
     /**
      * Get the next key/value pair.
      *

include/simdjson/dom/parsedjson.h

@@ -1,17 +0,0 @@
-// TODO Remove this -- deprecated API and files
-
-#ifndef SIMDJSON_DOM_PARSEDJSON_H
-#define SIMDJSON_DOM_PARSEDJSON_H
-
-#include "simdjson/dom/base.h"
-
-namespace simdjson {
-
-/**
- * @deprecated Use `dom::parser` instead.
- */
-using ParsedJson [[deprecated("Use dom::parser instead")]] = dom::parser;
-
-} // namespace simdjson
-
-#endif // SIMDJSON_DOM_PARSEDJSON_H

include/simdjson/dom/parsedjson_iterator-inl.h

@@ -1,545 +0,0 @@
-#ifndef SIMDJSON_PARSEDJSON_ITERATOR_INL_H
-#define SIMDJSON_PARSEDJSON_ITERATOR_INL_H
-
-#include "simdjson/dom/base.h"
-#include "simdjson/dom/parsedjson_iterator.h"
-#include "simdjson/internal/jsonformatutils.h"
-
-#include "simdjson/dom/parser-inl.h"
-#include "simdjson/internal/tape_ref-inl.h"
-
-#include <cstring>
-#include <iterator>
-#include <limits>
-#include <ostream>
-
-#ifndef SIMDJSON_DISABLE_DEPRECATED_API
-
-namespace simdjson {
-
-// VS2017 reports deprecated warnings when you define a deprecated class's methods.
-SIMDJSON_PUSH_DISABLE_WARNINGS
-SIMDJSON_DISABLE_DEPRECATED_WARNING
-
-// Because of template weirdness, the actual class definition is inline in the document class
-simdjson_warn_unused bool dom::parser::Iterator::is_ok() const {
-  return location < tape_length;
-}
-
-// useful for debugging purposes
-size_t dom::parser::Iterator::get_tape_location() const {
-  return location;
-}
-
-// useful for debugging purposes
-size_t dom::parser::Iterator::get_tape_length() const {
-  return tape_length;
-}
-
-// returns the current depth (start at 1 with 0 reserved for the fictitious root
-// node)
-size_t dom::parser::Iterator::get_depth() const {
-  return depth;
-}
-
-// A scope is a series of nodes at the same depth, typically it is either an
-// object ({) or an array ([). The root node has type 'r'.
-uint8_t dom::parser::Iterator::get_scope_type() const {
-  return depth_index[depth].scope_type;
-}
-
-bool dom::parser::Iterator::move_forward() {
-  if (location + 1 >= tape_length) {
-    return false; // we are at the end!
-  }
-
-  if ((current_type == '[') || (current_type == '{')) {
-    // We are entering a new scope
-    depth++;
-    assert(depth < max_depth);
-    depth_index[depth].start_of_scope = location;
-    depth_index[depth].scope_type = current_type;
-  } else if ((current_type == ']') || (current_type == '}')) {
-    // Leaving a scope.
-    depth--;
-  } else if (is_number()) {
-    // these types use 2 locations on the tape, not just one.
-    location += 1;
-  }
-
-  location += 1;
-  current_val = doc.tape[location];
-  current_type = uint8_t(current_val >> 56);
-  return true;
-}
-
-void dom::parser::Iterator::move_to_value() {
-  // assume that we are on a key, so move by 1.
-  location += 1;
-  current_val = doc.tape[location];
-  current_type = uint8_t(current_val >> 56);
-}
-
-bool dom::parser::Iterator::move_to_key(const char *key) {
-    if (down()) {
-      do {
-        const bool right_key = (strcmp(get_string(), key) == 0);
-        move_to_value();
-        if (right_key) {
-          return true;
-        }
-      } while (next());
-      up();
-    }
-    return false;
-}
-
-bool dom::parser::Iterator::move_to_key_insensitive(
-    const char *key) {
-    if (down()) {
-      do {
-        const bool right_key = (simdjson_strcasecmp(get_string(), key) == 0);
-        move_to_value();
-        if (right_key) {
-          return true;
-        }
-      } while (next());
-      up();
-    }
-    return false;
-}
-
-bool dom::parser::Iterator::move_to_key(const char *key,
-                                                       uint32_t length) {
-  if (down()) {
-    do {
-      bool right_key = ((get_string_length() == length) &&
-                        (memcmp(get_string(), key, length) == 0));
-      move_to_value();
-      if (right_key) {
-        return true;
-      }
-    } while (next());
-    up();
-  }
-  return false;
-}
-
-bool dom::parser::Iterator::move_to_index(uint32_t index) {
-  if (down()) {
-    uint32_t i = 0;
-    for (; i < index; i++) {
-      if (!next()) {
-        break;
-      }
-    }
-    if (i == index) {
-      return true;
-    }
-    up();
-  }
-  return false;
-}
-
-bool dom::parser::Iterator::prev() {
-  size_t target_location = location;
-  to_start_scope();
-  size_t npos = location;
-  if (target_location == npos) {
-    return false; // we were already at the start
-  }
-  size_t oldnpos;
-  // we have that npos < target_location here
-  do {
-    oldnpos = npos;
-    if ((current_type == '[') || (current_type == '{')) {
-      // we need to jump
-      npos = uint32_t(current_val);
-    } else {
-      npos = npos + ((current_type == 'd' || current_type == 'l') ? 2 : 1);
-    }
-  } while (npos < target_location);
-  location = oldnpos;
-  current_val = doc.tape[location];
-  current_type = uint8_t(current_val >> 56);
-  return true;
-}
-
-bool dom::parser::Iterator::up() {
-  if (depth == 1) {
-    return false; // don't allow moving back to root
-  }
-  to_start_scope();
-  // next we just move to the previous value
-  depth--;
-  location -= 1;
-  current_val = doc.tape[location];
-  current_type = uint8_t(current_val >> 56);
-  return true;
-}
-
-bool dom::parser::Iterator::down() {
-  if (location + 1 >= tape_length) {
-    return false;
-  }
-  if ((current_type == '[') || (current_type == '{')) {
-    size_t npos = uint32_t(current_val);
-    if (npos == location + 2) {
-      return false; // we have an empty scope
-    }
-    depth++;
-    assert(depth < max_depth);
-    location = location + 1;
-    depth_index[depth].start_of_scope = location;
-    depth_index[depth].scope_type = current_type;
-    current_val = doc.tape[location];
-    current_type = uint8_t(current_val >> 56);
-    return true;
-  }
-  return false;
-}
-
-void dom::parser::Iterator::to_start_scope() {
-  location = depth_index[depth].start_of_scope;
-  current_val = doc.tape[location];
-  current_type = uint8_t(current_val >> 56);
-}
-
-inline void dom::parser::Iterator::rewind() {
-    while (up())
-    ;
-}
-
-
-bool dom::parser::Iterator::next() {
-  size_t npos;
-  if ((current_type == '[') || (current_type == '{')) {
-    // we need to jump
-    npos = uint32_t(current_val);
-  } else {
-    npos = location + (is_number() ? 2 : 1);
-  }
-  uint64_t next_val = doc.tape[npos];
-  uint8_t next_type = uint8_t(next_val >> 56);
-  if ((next_type == ']') || (next_type == '}')) {
-    return false; // we reached the end of the scope
-  }
-  location = npos;
-  current_val = next_val;
-  current_type = next_type;
-  return true;
-}
-dom::parser::Iterator::Iterator(const dom::parser &pj) noexcept(false)
-    : doc(pj.doc)
-{
-#if SIMDJSON_EXCEPTIONS
-  if (!pj.valid) { throw simdjson_error(pj.error); }
-#else
-  if (!pj.valid) { return; } //  abort() usage is forbidden in the library
-#endif
-
-  max_depth = pj.max_depth();
-  depth_index = new scopeindex_t[max_depth + 1];
-  depth_index[0].start_of_scope = location;
-  current_val = doc.tape[location++];
-  current_type = uint8_t(current_val >> 56);
-  depth_index[0].scope_type = current_type;
-  tape_length = size_t(current_val & internal::JSON_VALUE_MASK);
-  if (location < tape_length) {
-    // If we make it here, then depth_capacity must >=2, but the compiler
-    // may not know this.
-    current_val = doc.tape[location];
-    current_type = uint8_t(current_val >> 56);
-    depth++;
-    assert(depth < max_depth);
-    depth_index[depth].start_of_scope = location;
-    depth_index[depth].scope_type = current_type;
-  }
-}
-dom::parser::Iterator::Iterator(
-    const dom::parser::Iterator &o) noexcept
-    : doc(o.doc),
-    max_depth(o.depth),
-    depth(o.depth),
-    location(o.location),
-    tape_length(o.tape_length),
-    current_type(o.current_type),
-    current_val(o.current_val)
-{
-  depth_index = new scopeindex_t[max_depth+1];
-  std::memcpy(depth_index, o.depth_index, (depth + 1) * sizeof(depth_index[0]));
-}
-
-dom::parser::Iterator::~Iterator() noexcept {
-  if (depth_index) { delete[] depth_index; }
-}
-
-bool dom::parser::Iterator::print(std::ostream &os, bool escape_strings) const {
-  if (!is_ok()) {
-    return false;
-  }
-  switch (current_type) {
-  case '"': // we have a string
-    os << '"';
-    if (escape_strings) {
-      os << internal::escape_json_string(std::string_view(get_string(), get_string_length()));
-    } else {
-      // was: os << get_string();, but given that we can include null chars, we
-      // have to do something crazier:
-      std::copy(get_string(), get_string() + get_string_length(), std::ostream_iterator<char>(os));
-    }
-    os << '"';
-    break;
-  case 'l': // we have a long int
-    os << get_integer();
-    break;
-  case 'u':
-    os << get_unsigned_integer();
-    break;
-  case 'd':
-    os << get_double();
-    break;
-  case 'n': // we have a null
-    os << "null";
-    break;
-  case 't': // we have a true
-    os << "true";
-    break;
-  case 'f': // we have a false
-    os << "false";
-    break;
-  case '{': // we have an object
-  case '}': // we end an object
-  case '[': // we start an array
-  case ']': // we end an array
-    os << char(current_type);
-    break;
-  default:
-    return false;
-  }
-  return true;
-}
-
-bool dom::parser::Iterator::move_to(const char *pointer,
-                                                   uint32_t length) {
-  char *new_pointer = nullptr;
-  if (pointer[0] == '#') {
-    // Converting fragment representation to string representation
-    new_pointer = new char[length];
-    uint32_t new_length = 0;
-    for (uint32_t i = 1; i < length; i++) {
-      if (pointer[i] == '%' && pointer[i + 1] == 'x') {
-#if __cpp_exceptions
-        try {
-#endif
-          int fragment =
-              std::stoi(std::string(&pointer[i + 2], 2), nullptr, 16);
-          if (fragment == '\\' || fragment == '"' || (fragment <= 0x1F)) {
-            // escaping the character
-            new_pointer[new_length] = '\\';
-            new_length++;
-          }
-          new_pointer[new_length] = char(fragment);
-          i += 3;
-#if __cpp_exceptions
-        } catch (std::invalid_argument &) {
-          delete[] new_pointer;
-          return false; // the fragment is invalid
-        }
-#endif
-      } else {
-        new_pointer[new_length] = pointer[i];
-      }
-      new_length++;
-    }
-    length = new_length;
-    pointer = new_pointer;
-  }
-
-  // saving the current state
-  size_t depth_s = depth;
-  size_t location_s = location;
-  uint8_t current_type_s = current_type;
-  uint64_t current_val_s = current_val;
-
-  rewind(); // The json pointer is used from the root of the document.
-
-  bool found = relative_move_to(pointer, length);
-  delete[] new_pointer;
-
-  if (!found) {
-    // since the pointer has found nothing, we get back to the original
-    // position.
-    depth = depth_s;
-    location = location_s;
-    current_type = current_type_s;
-    current_val = current_val_s;
-  }
-
-  return found;
-}
-
-inline bool dom::parser::Iterator::move_to(const std::string &pointer) {
-  return move_to(pointer.c_str(), uint32_t(pointer.length()));
-}
-
-inline int64_t dom::parser::Iterator::get_integer() const {
-    if (location + 1 >= tape_length) {
-    return 0; // default value in case of error
-    }
-    return static_cast<int64_t>(doc.tape[location + 1]);
-}
-
-inline uint64_t dom::parser::Iterator::get_unsigned_integer() const {
-    if (location + 1 >= tape_length) {
-    return 0; // default value in case of error
-    }
-    return doc.tape[location + 1];
-}
-
-inline const char * dom::parser::Iterator::get_string() const {
-    return reinterpret_cast<const char *>(
-        doc.string_buf.get() + (current_val & internal::JSON_VALUE_MASK) + sizeof(uint32_t));
-}
-
-inline uint32_t dom::parser::Iterator::get_string_length() const {
-    uint32_t answer;
-    std::memcpy(&answer,
-        reinterpret_cast<const char *>(doc.string_buf.get() +
-                                        (current_val & internal::JSON_VALUE_MASK)),
-        sizeof(uint32_t));
-    return answer;
-}
-
-inline double dom::parser::Iterator::get_double() const {
-    if (location + 1 >= tape_length) {
-    return std::numeric_limits<double>::quiet_NaN(); // default value in
-                                                    // case of error
-    }
-    double answer;
-    std::memcpy(&answer, &doc.tape[location + 1], sizeof(answer));
-    return answer;
-}
-
-bool dom::parser::Iterator::relative_move_to(const char *pointer,
-                                                            uint32_t length) {
-  if (length == 0) {
-    // returns the whole document
-    return true;
-  }
-
-  if (pointer[0] != '/') {
-    // '/' must be the first character
-    return false;
-  }
-
-  // finding the key in an object or the index in an array
-  std::string key_or_index;
-  uint32_t offset = 1;
-
-  // checking for the "-" case
-  if (is_array() && pointer[1] == '-') {
-    if (length != 2) {
-      // the pointer must be exactly "/-"
-      // there can't be anything more after '-' as an index
-      return false;
-    }
-    key_or_index = '-';
-    offset = length; // will skip the loop coming right after
-  }
-
-  // We either transform the first reference token to a valid json key
-  // or we make sure it is a valid index in an array.
-  for (; offset < length; offset++) {
-    if (pointer[offset] == '/') {
-      // beginning of the next key or index
-      break;
-    }
-    if (is_array() && (pointer[offset] < '0' || pointer[offset] > '9')) {
-      // the index of an array must be an integer
-      // we also make sure std::stoi won't discard whitespaces later
-      return false;
-    }
-    if (pointer[offset] == '~') {
-      // "~1" represents "/"
-      if (pointer[offset + 1] == '1') {
-        key_or_index += '/';
-        offset++;
-        continue;
-      }
-      // "~0" represents "~"
-      if (pointer[offset + 1] == '0') {
-        key_or_index += '~';
-        offset++;
-        continue;
-      }
-    }
-    if (pointer[offset] == '\\') {
-      if (pointer[offset + 1] == '\\' || pointer[offset + 1] == '"' ||
-          (pointer[offset + 1] <= 0x1F)) {
-        key_or_index += pointer[offset + 1];
-        offset++;
-        continue;
-      }
-      return false; // invalid escaped character
-    }
-    if (pointer[offset] == '\"') {
-      // unescaped quote character. this is an invalid case.
-      // lets do nothing and assume most pointers will be valid.
-      // it won't find any corresponding json key anyway.
-      // return false;
-    }
-    key_or_index += pointer[offset];
-  }
-
-  bool found = false;
-  if (is_object()) {
-    if (move_to_key(key_or_index.c_str(), uint32_t(key_or_index.length()))) {
-      found = relative_move_to(pointer + offset, length - offset);
-    }
-  } else if (is_array()) {
-    if (key_or_index == "-") { // handling "-" case first
-      if (down()) {
-        while (next())
-          ; // moving to the end of the array
-        // moving to the nonexistent value right after...
-        size_t npos;
-        if ((current_type == '[') || (current_type == '{')) {
-          // we need to jump
-          npos = uint32_t(current_val);
-        } else {
-          npos =
-              location + ((current_type == 'd' || current_type == 'l') ? 2 : 1);
-        }
-        location = npos;
-        current_val = doc.tape[npos];
-        current_type = uint8_t(current_val >> 56);
-        return true; // how could it fail ?
-      }
-    } else { // regular numeric index
-      // The index can't have a leading '0'
-      if (key_or_index[0] == '0' && key_or_index.length() > 1) {
-        return false;
-      }
-      // it cannot be empty
-      if (key_or_index.length() == 0) {
-        return false;
-      }
-      // we already checked the index contains only valid digits
-      uint32_t index = std::stoi(key_or_index);
-      if (move_to_index(index)) {
-        found = relative_move_to(pointer + offset, length - offset);
-      }
-    }
-  }
-
-  return found;
-}
-
-SIMDJSON_POP_DISABLE_WARNINGS
-} // namespace simdjson
-
-#endif // SIMDJSON_DISABLE_DEPRECATED_API
-
-
-#endif // SIMDJSON_PARSEDJSON_ITERATOR_INL_H

include/simdjson/dom/parsedjson_iterator.h

@@ -1,231 +0,0 @@
-// TODO Remove this -- deprecated API and files
-
-#ifndef SIMDJSON_DOM_PARSEDJSON_ITERATOR_H
-#define SIMDJSON_DOM_PARSEDJSON_ITERATOR_H
-
-#include "simdjson/dom/base.h"
-#include "simdjson/dom/parser.h"
-
-#ifndef SIMDJSON_DISABLE_DEPRECATED_API
-
-namespace simdjson {
-/** @private **/
-class [[deprecated("Use the new DOM navigation API instead (see doc/basics.md)")]] dom::parser::Iterator {
-public:
-  inline Iterator(const dom::parser &parser) noexcept(false);
-  inline Iterator(const Iterator &o) noexcept;
-  inline ~Iterator() noexcept;
-
-  inline Iterator& operator=(const Iterator&) = delete;
-
-  inline bool is_ok() const;
-
-  // useful for debugging purposes
-  inline size_t get_tape_location() const;
-
-  // useful for debugging purposes
-  inline size_t get_tape_length() const;
-
-  // returns the current depth (start at 1 with 0 reserved for the fictitious
-  // root node)
-  inline size_t get_depth() const;
-
-  // A scope is a series of nodes at the same depth, typically it is either an
-  // object ({) or an array ([). The root node has type 'r'.
-  inline uint8_t get_scope_type() const;
-
-  // move forward in document order
-  inline bool move_forward();
-
-  // retrieve the character code of what we're looking at:
-  // [{"slutfn are the possibilities
-  inline uint8_t get_type() const {
-      return current_type; // short functions should be inlined!
-  }
-
-  // get the int64_t value at this node; valid only if get_type is "l"
-  inline int64_t get_integer() const;
-
-  // get the value as uint64; valid only if  if get_type is "u"
-  inline uint64_t get_unsigned_integer() const;
-
-  // get the string value at this node (NULL ended); valid only if get_type is "
-  // note that tabs, and line endings are escaped in the returned value (see
-  // print_with_escapes) return value is valid UTF-8, it may contain NULL chars
-  // within the string: get_string_length determines the true string length.
-  inline const char *get_string() const;
-
-  // return the length of the string in bytes
-  inline uint32_t get_string_length() const;
-
-  // get the double value at this node; valid only if
-  // get_type() is "d"
-  inline double get_double() const;
-
-  inline bool is_object_or_array() const { return is_object() || is_array(); }
-
-  inline bool is_object() const { return get_type() == '{'; }
-
-  inline bool is_array() const { return get_type() == '['; }
-
-  inline bool is_string() const { return get_type() == '"'; }
-
-  // Returns true if the current type of the node is an signed integer.
-  // You can get its value with `get_integer()`.
-  inline bool is_integer() const { return get_type() == 'l'; }
-
-  // Returns true if the current type of the node is an unsigned integer.
-  // You can get its value with `get_unsigned_integer()`.
-  //
-  // NOTE:
-  // Only a large value, which is out of range of a 64-bit signed integer, is
-  // represented internally as an unsigned node. On the other hand, a typical
-  // positive integer, such as 1, 42, or 1000000, is as a signed node.
-  // Be aware this function returns false for a signed node.
-  inline bool is_unsigned_integer() const { return get_type() == 'u'; }
-  // Returns true if the current type of the node is a double floating-point number.
-  inline bool is_double() const { return get_type() == 'd'; }
-  // Returns true if the current type of the node is a number (integer or floating-point).
-  inline bool is_number() const {
-      return is_integer() || is_unsigned_integer() || is_double();
-  }
-  // Returns true if the current type of the node is a bool with true value.
-  inline bool is_true() const { return get_type() == 't'; }
-  // Returns true if the current type of the node is a bool with false value.
-  inline bool is_false() const { return get_type() == 'f'; }
-  // Returns true if the current type of the node is null.
-  inline bool is_null() const { return get_type() == 'n'; }
-  // Returns true if the type byte represents an object of an array
-  static bool is_object_or_array(uint8_t type) {
-      return ((type == '[') || (type == '{'));
-  }
-
-  // when at {, go one level deep, looking for a given key
-  // if successful, we are left pointing at the value,
-  // if not, we are still pointing at the object ({)
-  // (in case of repeated keys, this only finds the first one).
-  // We seek the key using C's strcmp so if your JSON strings contain
-  // NULL chars, this would trigger a false positive: if you expect that
-  // to be the case, take extra precautions.
-  // Furthermore, we do the comparison character-by-character
-  // without taking into account Unicode equivalence.
-  inline bool move_to_key(const char *key);
-
-  // as above, but case insensitive lookup (strcmpi instead of strcmp)
-  inline bool move_to_key_insensitive(const char *key);
-
-  // when at {, go one level deep, looking for a given key
-  // if successful, we are left pointing at the value,
-  // if not, we are still pointing at the object ({)
-  // (in case of repeated keys, this only finds the first one).
-  // The string we search for can contain NULL values.
-  // Furthermore, we do the comparison character-by-character
-  // without taking into account Unicode equivalence.
-  inline bool move_to_key(const char *key, uint32_t length);
-
-  // when at a key location within an object, this moves to the accompanying
-  // value (located next to it). This is equivalent but much faster than
-  // calling "next()".
-  inline void move_to_value();
-
-  // when at [, go one level deep, and advance to the given index.
-  // if successful, we are left pointing at the value,
-  // if not, we are still pointing at the array ([)
-  inline bool move_to_index(uint32_t index);
-
-  // Moves the iterator to the value corresponding to the json pointer.
-  // Always search from the root of the document.
-  // if successful, we are left pointing at the value,
-  // if not, we are still pointing the same value we were pointing before the
-  // call. The json pointer follows the rfc6901 standard's syntax:
-  // https://tools.ietf.org/html/rfc6901 However, the standard says "If a
-  // referenced member name is not unique in an object, the member that is
-  // referenced is undefined, and evaluation fails". Here we just return the
-  // first corresponding value. The length parameter is the length of the
-  // jsonpointer string ('pointer').
-  inline bool move_to(const char *pointer, uint32_t length);
-
-  // Moves the iterator to the value corresponding to the json pointer.
-  // Always search from the root of the document.
-  // if successful, we are left pointing at the value,
-  // if not, we are still pointing the same value we were pointing before the
-  // call. The json pointer implementation follows the rfc6901 standard's
-  // syntax: https://tools.ietf.org/html/rfc6901 However, the standard says
-  // "If a referenced member name is not unique in an object, the member that
-  // is referenced is undefined, and evaluation fails". Here we just return
-  // the first corresponding value.
-  inline bool move_to(const std::string &pointer);
-
-  private:
-  // Almost the same as move_to(), except it searches from the current
-  // position. The pointer's syntax is identical, though that case is not
-  // handled by the rfc6901 standard. The '/' is still required at the
-  // beginning. However, contrary to move_to(), the URI Fragment Identifier
-  // Representation is not supported here. Also, in case of failure, we are
-  // left pointing at the closest value it could reach. For these reasons it
-  // is private. It exists because it is used by move_to().
-  inline bool relative_move_to(const char *pointer, uint32_t length);
-
-  public:
-  // throughout return true if we can do the navigation, false
-  // otherwise
-
-  // Within a given scope (series of nodes at the same depth within either an
-  // array or an object), we move forward.
-  // Thus, given [true, null, {"a":1}, [1,2]], we would visit true, null, {
-  // and [. At the object ({) or at the array ([), you can issue a "down" to
-  // visit their content. valid if we're not at the end of a scope (returns
-  // true).
-  inline bool next();
-
-  // Within a given scope (series of nodes at the same depth within either an
-  // array or an object), we move backward.
-  // Thus, given [true, null, {"a":1}, [1,2]], we would visit ], }, null, true
-  // when starting at the end of the scope. At the object ({) or at the array
-  // ([), you can issue a "down" to visit their content.
-  // Performance warning: This function is implemented by starting again
-  // from the beginning of the scope and scanning forward. You should expect
-  // it to be relatively slow.
-  inline bool prev();
-
-  // Moves back to either the containing array or object (type { or [) from
-  // within a contained scope.
-  // Valid unless we are at the first level of the document
-  inline bool up();
-
-  // Valid if we're at a [ or { and it starts a non-empty scope; moves us to
-  // start of that deeper scope if it not empty. Thus, given [true, null,
-  // {"a":1}, [1,2]], if we are at the { node, we would move to the "a" node.
-  inline bool down();
-
-  // move us to the start of our current scope,
-  // a scope is a series of nodes at the same level
-  inline void to_start_scope();
-
-  inline void rewind();
-
-
-
-  // print the node we are currently pointing at
-  inline bool print(std::ostream &os, bool escape_strings = true) const;
-
-  private:
-  const document &doc;
-  size_t max_depth{};
-  size_t depth{};
-  size_t location{}; // our current location on a tape
-  size_t tape_length{};
-  uint8_t current_type{};
-  uint64_t current_val{};
-  typedef struct {
-      size_t start_of_scope;
-      uint8_t scope_type;
-  } scopeindex_t;
-
-  scopeindex_t *depth_index{};
-};
-
-} // namespace simdjson
-#endif // SIMDJSON_DISABLE_DEPRECATED_API
-
-#endif // SIMDJSON_DOM_PARSEDJSON_ITERATOR_H

include/simdjson/dom/parser-inl.h

@@ -92,10 +92,14 @@ inline simdjson_result<size_t> parser::read_file(const std::string &path) noexce
 }
 
 inline simdjson_result<element> parser::load(const std::string &path) & noexcept {
+  return load_into_document(doc, path);
+}
+
+inline simdjson_result<element> parser::load_into_document(document& provided_doc, const std::string &path) & noexcept {
   size_t len;
   auto _error = read_file(path).get(len);
   if (_error) { return _error; }
-  return parse(loaded_bytes.get(), len, false);
+  return parse_into_document(provided_doc, loaded_bytes.get(), len, false);
 }
 
 inline simdjson_result<document_stream> parser::load_many(const std::string &path, size_t batch_size) noexcept {

include/simdjson/dom/parser.h

@@ -83,6 +83,15 @@ public:
    * If the parser's current capacity is less than the file length, it will allocate enough capacity
    * to handle it (up to max_capacity).
    *
+   * ## Windows and Unicode
+   *
+   * Windows users who need to read files with non-ANSI characters in the
+   * name should set their code page to UTF-8 (65001) before calling this
+   * function. This should be the default with Windows 11 and better.
+   * Further, they may use the AreFileApisANSI function to determine whether
+   * the filename is interpreted using the ANSI or the system default OEM
+   * codepage, and they may call SetFileApisToOEM accordingly.
+   *
    * @param path The path to load.
    * @return The document, or an error:
    *         - IO_ERROR if there was an error opening or reading the file.
@@ -95,6 +104,53 @@ public:
    */
   inline simdjson_result<element> load(const std::string &path) & noexcept;
   inline simdjson_result<element> load(const std::string &path) &&  = delete ;
+
+  /**
+   * Load a JSON document from a file into a provide document instance and return a temporary reference to it.
+   * It is similar to the function `load` except that instead of parsing into the internal
+   * `document` instance associated with the parser, it allows the user to provide a document
+   * instance.
+   *
+   *   dom::parser parser;
+   *   dom::document doc;
+   *   element doc_root = parser.load_into_document(doc, "jsonexamples/twitter.json");
+   *
+   * The function is eager: the file's content is loaded in memory inside the parser instance
+   * and immediately parsed. The file can be deleted after the `parser.load_into_document` call.
+   *
+   * ### IMPORTANT: Document Lifetime
+   *
+   * After the call to load_into_document, the parser is no longer needed.
+   *
+   * The JSON document lives in the document instance: you must keep the document
+   * instance alive while you navigate through it (i.e., used the returned value from
+   * load_into_document). You are encourage to reuse the document instance
+   * many times with new data to avoid reallocations:
+   *
+   *   dom::document doc;
+   *   element doc_root1 = parser.load_into_document(doc, "jsonexamples/twitter.json");
+   *   //... doc_root1 is a pointer inside doc
+   *   element doc_root2 = parser.load_into_document(doc, "jsonexamples/twitter.json");
+   *   //... doc_root2 is a pointer inside doc
+   *   // at this point doc_root1 is no longer safe
+   *
+   * Moving the document instance is safe, but it invalidates the element instances. After
+   * moving a document, you can recover safe access to the document root with its `root()` method.
+   *
+   * @param doc The document instance where the parsed data will be stored (on success).
+   * @param path The path to load.
+   * @return The document, or an error:
+   *         - IO_ERROR if there was an error opening or reading the file.
+   *           Be mindful that on some 32-bit systems,
+   *           the file size might be limited to 2 GB.
+   *         - MEMALLOC if the parser does not have enough capacity and memory allocation fails.
+   *         - CAPACITY if the parser does not have enough capacity and len > max_capacity.
+   *         - other json errors if parsing fails. You should not rely on these errors to always the same for the
+   *           same document: they may vary under runtime dispatch (so they may vary depending on your system and hardware).
+   */
+  inline simdjson_result<element> load_into_document(document& doc, const std::string &path) & noexcept;
+  inline simdjson_result<element> load_into_document(document& doc, const std::string &path) && =delete;
+
   /**
    * Parse a JSON document and return a temporary reference to it.
    *

include/simdjson/error.h

@@ -27,6 +27,7 @@ enum error_code {
   F_ATOM_ERROR,               ///< Problem while parsing an atom starting with the letter 'f'
   N_ATOM_ERROR,               ///< Problem while parsing an atom starting with the letter 'n'
   NUMBER_ERROR,               ///< Problem while parsing a number
+  BIGINT_ERROR,               ///< The integer value exceeds 64 bits
   UTF8_ERROR,                 ///< the input is not valid UTF-8
   UNINITIALIZED,              ///< unknown error, or uninitialized document
   EMPTY,                      ///< no structural element found

include/simdjson/generic/base.h

@@ -17,6 +17,10 @@
 #include "simdjson/arm64/begin.h"
 #elif SIMDJSON_IMPLEMENTATION_PPC64
 #include "simdjson/ppc64/begin.h"
+#elif SIMDJSON_IMPLEMENTATION_LSX
+#include "simdjson/lsx/begin.h"
+#elif SIMDJSON_IMPLEMENTATION_LASX
+#include "simdjson/lasx/begin.h"
 #elif SIMDJSON_IMPLEMENTATION_FALLBACK
 #include "simdjson/fallback/begin.h"
 #else
@@ -37,7 +41,8 @@ class dom_parser_implementation;
 enum class number_type {
     floating_point_number=1, /// a binary64 number
     signed_integer,          /// a signed integer that fits in a 64-bit word using two's complement
-    unsigned_integer         /// a positive integer larger or equal to 1<<63
+    unsigned_integer,        /// a positive integer larger or equal to 1<<63
+    big_integer              /// a big integer that does not fit in a 64-bit word
 };
 
 } // namespace SIMDJSON_IMPLEMENTATION

include/simdjson/generic/numberparsing.h

@@ -20,11 +20,13 @@ namespace numberparsing {
 #define WRITE_INTEGER(VALUE, SRC, WRITER) (found_integer((VALUE), (SRC)), (WRITER).append_s64((VALUE)))
 #define WRITE_UNSIGNED(VALUE, SRC, WRITER) (found_unsigned_integer((VALUE), (SRC)), (WRITER).append_u64((VALUE)))
 #define WRITE_DOUBLE(VALUE, SRC, WRITER) (found_float((VALUE), (SRC)), (WRITER).append_double((VALUE)))
+#define BIGINT_NUMBER(SRC) (found_invalid_number((SRC)), BIGINT_ERROR)
 #else
 #define INVALID_NUMBER(SRC) (NUMBER_ERROR)
 #define WRITE_INTEGER(VALUE, SRC, WRITER) (WRITER).append_s64((VALUE))
 #define WRITE_UNSIGNED(VALUE, SRC, WRITER) (WRITER).append_u64((VALUE))
 #define WRITE_DOUBLE(VALUE, SRC, WRITER) (WRITER).append_double((VALUE))
+#define BIGINT_NUMBER(SRC) (BIGINT_ERROR)
 #endif
 
 namespace {
@@ -355,6 +357,10 @@ simdjson_inline bool parse_digit(const uint8_t c, I &i) {
   return true;
 }
 
+simdjson_inline bool is_digit(const uint8_t c) {
+  return static_cast<uint8_t>(c - '0') <= 9;
+}
+
 simdjson_inline error_code parse_decimal_after_separator(simdjson_unused const uint8_t *const src, const uint8_t *&p, uint64_t &i, int64_t &exponent) {
   // we continue with the fiction that we have an integer. If the
   // floating point number is representable as x * 10^z for some integer
@@ -412,7 +418,7 @@ simdjson_inline error_code parse_exponent(simdjson_unused const uint8_t *const s
   // If there were more than 18 digits, we may have overflowed the integer. We have to do
   // something!!!!
   if (simdjson_unlikely(p > start_exp+18)) {
-    // Skip leading zeroes: 1e000000000000000000001 is technically valid and doesn't overflow
+    // Skip leading zeroes: 1e000000000000000000001 is technically valid and does not overflow
     while (*start_exp == '0') { start_exp++; }
     // 19 digits could overflow int64_t and is kind of absurd anyway. We don't
     // support exponents smaller than -999,999,999,999,999,999 and bigger
@@ -434,6 +440,23 @@ simdjson_inline error_code parse_exponent(simdjson_unused const uint8_t *const s
   return SUCCESS;
 }
 
+simdjson_inline bool check_if_integer(const uint8_t *const src, size_t max_length) {
+  const uint8_t *const srcend = src + max_length;
+  bool negative = (*src == '-'); // we can always read at least one character after the '-'
+  const uint8_t *p = src + uint8_t(negative);
+  if(p == srcend) { return false; }
+  if(*p == '0') {
+    ++p;
+    if(p == srcend) { return true; }
+    if(jsoncharutils::is_not_structural_or_whitespace(*p)) { return false; }
+    return true;
+  }
+  while(p != srcend && is_digit(*p)) { ++p; }
+  if(p == srcend) { return true; }
+  if(jsoncharutils::is_not_structural_or_whitespace(*p)) { return false; }
+  return true;
+}
+
 simdjson_inline size_t significant_digits(const uint8_t * start_digits, size_t digit_count) {
   // It is possible that the integer had an overflow.
   // We have to handle the case where we have 0.0000somenumber.
@@ -446,11 +469,8 @@ simdjson_inline size_t significant_digits(const uint8_t * start_digits, size_t d
 } // unnamed namespace
 
 /** @private */
-template<typename W>
-error_code slow_float_parsing(simdjson_unused const uint8_t * src, W writer) {
-  double d;
-  if (parse_float_fallback(src, &d)) {
-    writer.append_double(d);
+static error_code slow_float_parsing(simdjson_unused const uint8_t * src, double* answer) {
+  if (parse_float_fallback(src, answer)) {
     return SUCCESS;
   }
   return INVALID_NUMBER(src);
@@ -474,13 +494,13 @@ simdjson_inline error_code write_float(const uint8_t *const src, bool negative,
     // 10000000000000000000000000000000000000000000e+308
     // 3.1415926535897932384626433832795028841971693993751
     //
-    // NOTE: This makes a *copy* of the writer and passes it to slow_float_parsing. This happens
-    // because slow_float_parsing is a non-inlined function. If we passed our writer reference to
-    // it, it would force it to be stored in memory, preventing the compiler from picking it apart
-    // and putting into registers. i.e. if we pass it as reference, it gets slow.
-    // This is what forces the skip_double, as well.
-    error_code error = slow_float_parsing(src, writer);
-    writer.skip_double();
+    // NOTE: We do not pass a reference to the to slow_float_parsing. If we passed our writer
+    // reference to it, it would force it to be stored in memory, preventing the compiler from
+    // picking it apart and putting into registers. i.e. if we pass it as reference,
+    // it gets slow.
+    double d;
+    error_code error = slow_float_parsing(src, &d);
+    writer.append_double(d);
     return error;
   }
   // NOTE: it's weird that the simdjson_unlikely() only wraps half the if, but it seems to get slower any other
@@ -511,6 +531,18 @@ simdjson_inline error_code write_float(const uint8_t *const src, bool negative,
   return SUCCESS;
 }
 
+// parse the number at src
+// define JSON_TEST_NUMBERS for unit testing
+//
+// It is assumed that the number is followed by a structural ({,},],[) character
+// or a white space character. If that is not the case (e.g., when the JSON
+// document is made of a single number), then it is necessary to copy the
+// content and append a space before calling this function.
+//
+// Our objective is accurate parsing (ULP of 0) at high speed.
+template<typename W>
+simdjson_inline error_code parse_number(const uint8_t *const src, W &writer);
+
 // for performance analysis, it is sometimes  useful to skip parsing
 #ifdef SIMDJSON_SKIPNUMBERPARSING
 
@@ -589,11 +621,11 @@ simdjson_inline error_code parse_number(const uint8_t *const src, W &writer) {
   // The longest positive 64-bit number is 20 digits.
   // We do it this way so we don't trigger this branch unless we must.
   size_t longest_digit_count = negative ? 19 : 20;
-  if (digit_count > longest_digit_count) { return INVALID_NUMBER(src); }
+  if (digit_count > longest_digit_count) { return BIGINT_NUMBER(src); }
   if (digit_count == longest_digit_count) {
     if (negative) {
       // Anything negative above INT64_MAX+1 is invalid
-      if (i > uint64_t(INT64_MAX)+1) { return INVALID_NUMBER(src);  }
+      if (i > uint64_t(INT64_MAX)+1) { return BIGINT_NUMBER(src);  }
       WRITE_INTEGER(~i+1, src, writer);
       if (jsoncharutils::is_not_structural_or_whitespace(*p)) { return INVALID_NUMBER(src); }
       return SUCCESS;
@@ -612,7 +644,7 @@ simdjson_inline error_code parse_number(const uint8_t *const src, W &writer) {
     }  else if (src[0] != uint8_t('1') || i <= uint64_t(INT64_MAX)) { return INVALID_NUMBER(src); }
   }
 
-  // Write unsigned if it doesn't fit in a signed integer.
+  // Write unsigned if it does not fit in a signed integer.
   if (i > uint64_t(INT64_MAX)) {
     WRITE_UNSIGNED(i, src, writer);
   } else {
@@ -1004,7 +1036,7 @@ simdjson_unused simdjson_inline simdjson_result<double> parse_double(const uint8
       // Skip leading 0.00000 and see if it still overflows
       const uint8_t *start_digits = src + 2;
       while (*start_digits == '0') { start_digits++; }
-      overflow = start_digits-src > 19;
+      overflow = p-start_digits > 19;
     }
   } else {
     overflow = p-src > 19;
@@ -1063,19 +1095,32 @@ simdjson_unused simdjson_inline simdjson_result<number_type> get_number_type(con
   src += uint8_t(negative);
   const uint8_t *p = src;
   while(static_cast<uint8_t>(*p - '0') <= 9) { p++; }
+  size_t digit_count = size_t(p - src);
   if ( p == src ) { return NUMBER_ERROR; }
   if (jsoncharutils::is_structural_or_whitespace(*p)) {
+    static const uint8_t * smaller_big_integer = reinterpret_cast<const uint8_t *>("9223372036854775808");
     // We have an integer.
+    if(simdjson_unlikely(digit_count > 20)) {
+      return number_type::big_integer;
+    }
     // If the number is negative and valid, it must be a signed integer.
-    if(negative) { return number_type::signed_integer; }
+    if(negative) {
+      if (simdjson_unlikely(digit_count > 19)) return number_type::big_integer;
+      if (simdjson_unlikely(digit_count == 19 && memcmp(src, smaller_big_integer, 19) > 0)) {
+        return number_type::big_integer;
+      }
+      return number_type::signed_integer;
+    }
+    // Let us check if we have a big integer (>=2**64).
+    static const uint8_t * two_to_sixtyfour = reinterpret_cast<const uint8_t *>("18446744073709551616");
+    if((digit_count > 20) || (digit_count == 20 && memcmp(src, two_to_sixtyfour, 20) >= 0)) {
+      return number_type::big_integer;
+    }
+    // The number is positive and smaller than 18446744073709551616 (or 2**64).
     // We want values larger or equal to 9223372036854775808 to be unsigned
     // integers, and the other values to be signed integers.
-    int digit_count = int(p - src);
-    if(digit_count >= 19) {
-      const uint8_t * smaller_big_integer = reinterpret_cast<const uint8_t *>("9223372036854775808");
-      if((digit_count >= 20) || (memcmp(src, smaller_big_integer, 19) >= 0)) {
-        return number_type::unsigned_integer;
-      }
+    if((digit_count == 20) || (digit_count >= 19 && memcmp(src, smaller_big_integer, 19) >= 0)) {
+      return number_type::unsigned_integer;
     }
     return number_type::signed_integer;
   }
@@ -1203,7 +1248,7 @@ simdjson_unused simdjson_inline simdjson_result<double> parse_double_in_string(c
       // Skip leading 0.00000 and see if it still overflows
       const uint8_t *start_digits = src + 2;
       while (*start_digits == '0') { start_digits++; }
-      overflow = start_digits-src > 19;
+      overflow = p-start_digits > 19;
     }
   } else {
     overflow = p-src > 19;
@@ -1253,6 +1298,7 @@ inline std::ostream& operator<<(std::ostream& out, number_type type) noexcept {
         case number_type::signed_integer: out << "integer in [-9223372036854775808,9223372036854775808)"; break;
         case number_type::unsigned_integer: out << "unsigned integer in [9223372036854775808,18446744073709551616)"; break;
         case number_type::floating_point_number: out << "floating-point number (binary64)"; break;
+        case number_type::big_integer: out << "big integer"; break;
         default: SIMDJSON_UNREACHABLE();
     }
     return out;
@@ -1261,4 +1307,4 @@ inline std::ostream& operator<<(std::ostream& out, number_type type) noexcept {
 } // namespace SIMDJSON_IMPLEMENTATION
 } // namespace simdjson
 
-#endif // SIMDJSON_GENERIC_NUMBERPARSING_H
+#endif // SIMDJSON_GENERIC_NUMBERPARSING_H

include/simdjson/generic/ondemand/array-inl.h

@@ -163,6 +163,59 @@ inline simdjson_result<value> array::at_pointer(std::string_view json_pointer) n
   return child;
 }
 
+inline std::string json_path_to_pointer_conversion(std::string_view json_path) {
+  if (json_path.empty() || (json_path.front() != '.' &&
+      json_path.front() != '[')) {
+    return "-1"; // This is just a sentinel value, the caller should check for this and return an error.
+  }
+
+  std::string result;
+  // Reserve space to reduce allocations, adjusting for potential increases due
+  // to escaping.
+  result.reserve(json_path.size() * 2);
+
+  size_t i = 0;
+
+  while (i < json_path.length()) {
+    if (json_path[i] == '.') {
+      result += '/';
+    } else if (json_path[i] == '[') {
+      result += '/';
+      ++i; // Move past the '['
+      while (i < json_path.length() && json_path[i] != ']') {
+          if (json_path[i] == '~') {
+            result += "~0";
+          } else if (json_path[i] == '/') {
+            result += "~1";
+          } else {
+            result += json_path[i];
+          }
+          ++i;
+      }
+      if (i == json_path.length() || json_path[i] != ']') {
+          return "-1"; // Using sentinel value that will be handled as an error by the caller.
+      }
+    } else {
+      if (json_path[i] == '~') {
+          result += "~0";
+      } else if (json_path[i] == '/') {
+          result += "~1";
+      } else {
+          result += json_path[i];
+      }
+    }
+    ++i;
+  }
+
+  return result;
+}
+
+inline simdjson_result<value> array::at_path(std::string_view json_path) noexcept {
+  auto json_pointer = json_path_to_pointer_conversion(json_path);
+  if (json_pointer == "-1") { return INVALID_JSON_POINTER; }
+  return at_pointer(json_pointer);
+}
+
 simdjson_inline simdjson_result<value> array::at(size_t index) noexcept {
   size_t i = 0;
   for (auto value : *this) {
@@ -217,10 +270,14 @@ simdjson_inline  simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::value> simdj
   if (error()) { return error(); }
   return first.at_pointer(json_pointer);
 }
+simdjson_inline  simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::value> simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::array>::at_path(std::string_view json_path) noexcept {
+  if (error()) { return error(); }
+  return first.at_path(json_path);
+}
 simdjson_inline  simdjson_result<std::string_view> simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::array>::raw_json() noexcept {
   if (error()) { return error(); }
   return first.raw_json();
 }
 } // namespace simdjson
 
-#endif // SIMDJSON_GENERIC_ONDEMAND_ARRAY_INL_H
+#endif // SIMDJSON_GENERIC_ONDEMAND_ARRAY_INL_H

include/simdjson/generic/ondemand/array.h

@@ -100,6 +100,22 @@ public:
    *         - INVALID_JSON_POINTER if the JSON pointer is invalid and cannot be parsed
    */
   inline simdjson_result<value> at_pointer(std::string_view json_pointer) noexcept;
+
+  /**
+   * Get the value associated with the given JSONPath expression. We only support
+   * JSONPath queries that trivially convertible to JSON Pointer queries: key
+   * names and array indices.
+   *
+   * https://datatracker.ietf.org/doc/html/draft-normington-jsonpath-00
+   *
+   * @return The value associated with the given JSONPath expression, or:
+   *         - INVALID_JSON_POINTER if the JSONPath to JSON Pointer conversion fails
+   *         - NO_SUCH_FIELD if a field does not exist in an object
+   *         - INDEX_OUT_OF_BOUNDS if an array index is larger than an array length
+   *         - INCORRECT_TYPE if a non-integer is used to access an array
+  */
+  inline simdjson_result<value> at_path(std::string_view json_path) noexcept;
+
   /**
    * Consumes the array and returns a string_view instance corresponding to the
    * array as represented in JSON. It points inside the original document.
@@ -190,10 +206,11 @@ public:
   inline simdjson_result<bool> reset() & noexcept;
   simdjson_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::value> at(size_t index) noexcept;
   simdjson_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::value> at_pointer(std::string_view json_pointer) noexcept;
+  simdjson_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::value> at_path(std::string_view json_path) noexcept;
   simdjson_inline simdjson_result<std::string_view> raw_json() noexcept;
 
 };
 
 } // namespace simdjson
 
-#endif // SIMDJSON_GENERIC_ONDEMAND_ARRAY_H
+#endif // SIMDJSON_GENERIC_ONDEMAND_ARRAY_H

include/simdjson/generic/ondemand/document-inl.h

@@ -7,6 +7,8 @@
 #include "simdjson/generic/ondemand/array_iterator.h"
 #include "simdjson/generic/ondemand/document.h"
 #include "simdjson/generic/ondemand/json_iterator-inl.h"
+#include "simdjson/generic/ondemand/json_path_to_pointer_conversion.h"
+#include "simdjson/generic/ondemand/json_path_to_pointer_conversion-inl.h"
 #include "simdjson/generic/ondemand/json_type.h"
 #include "simdjson/generic/ondemand/object-inl.h"
 #include "simdjson/generic/ondemand/raw_json_string.h"
@@ -181,6 +183,8 @@ template<typename T> simdjson_inline error_code document::get(T &out) && noexcep
 }
 
 #if SIMDJSON_EXCEPTIONS
+template <class T>
+simdjson_inline document::operator T() noexcept(false) { return get<T>(); }
 simdjson_inline document::operator array() & noexcept(false) { return get_array(); }
 simdjson_inline document::operator object() & noexcept(false) { return get_object(); }
 simdjson_inline document::operator uint64_t() noexcept(false) { return get_uint64(); }
@@ -265,6 +269,13 @@ simdjson_inline simdjson_result<bool> document::is_scalar() noexcept {
   return ! ((this_type == json_type::array) || (this_type == json_type::object));
 }
 
+simdjson_inline simdjson_result<bool> document::is_string() noexcept {
+  json_type this_type;
+  auto error = type().get(this_type);
+  if(error) { return error; }
+  return (this_type == json_type::string);
+}
+
 simdjson_inline bool document::is_negative() noexcept {
   return get_root_value_iterator().is_root_negative();
 }
@@ -284,7 +295,7 @@ simdjson_inline simdjson_result<number> document::get_number() noexcept {
 
 simdjson_inline simdjson_result<std::string_view> document::raw_json_token() noexcept {
   auto _iter = get_root_value_iterator();
-  return std::string_view(reinterpret_cast<const char*>(_iter.peek_start()), _iter.peek_start_length());
+  return std::string_view(reinterpret_cast<const char*>(_iter.peek_start()), _iter.peek_root_length());
 }
 
 simdjson_inline simdjson_result<value> document::at_pointer(std::string_view json_pointer) noexcept {
@@ -305,6 +316,23 @@ simdjson_inline simdjson_result<value> document::at_pointer(std::string_view jso
   }
 }
 
+simdjson_inline simdjson_result<value> document::at_path(std::string_view json_path) noexcept {
+  rewind(); // Rewind the document each time at_pointer is called
+  if (json_path.empty()) {
+      return this->get_value();
+  }
+  json_type t;
+  SIMDJSON_TRY(type().get(t));
+  switch (t) {
+  case json_type::array:
+      return (*this).get_array().at_path(json_path);
+  case json_type::object:
+      return (*this).get_object().at_path(json_path);
+  default:
+      return INVALID_JSON_POINTER;
+  }
+}
+
 } // namespace ondemand
 } // namespace SIMDJSON_IMPLEMENTATION
 } // namespace simdjson
@@ -480,6 +508,10 @@ simdjson_inline simdjson_result<bool> simdjson_result<SIMDJSON_IMPLEMENTATION::o
   return first.is_scalar();
 }
 
+simdjson_inline simdjson_result<bool> simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::document>::is_string() noexcept {
+  if (error()) { return error(); }
+  return first.is_string();
+}
 
 simdjson_inline bool simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::document>::is_negative() noexcept {
   if (error()) { return error(); }
@@ -503,6 +535,11 @@ simdjson_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::number> simdj
 
 
 #if SIMDJSON_EXCEPTIONS
+template <class T, typename std::enable_if<std::is_same<T, SIMDJSON_IMPLEMENTATION::ondemand::document>::value == false>::type>
+simdjson_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::document>::operator T() noexcept(false) {
+  if (error()) { throw simdjson_error(error()); }
+  return first;
+}
 simdjson_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::document>::operator SIMDJSON_IMPLEMENTATION::ondemand::array() & noexcept(false) {
   if (error()) { throw simdjson_error(error()); }
   return first;
@@ -568,6 +605,10 @@ simdjson_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::value> simdjs
   return first.at_pointer(json_pointer);
 }
 
+simdjson_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::value> simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::document>::at_path(std::string_view json_path) noexcept {
+  if (error()) { return error(); }
+  return first.at_path(json_path);
+}
 
 } // namespace simdjson
 
@@ -609,15 +650,25 @@ simdjson_inline simdjson_result<raw_json_string> document_reference::get_raw_jso
 simdjson_inline simdjson_result<bool> document_reference::get_bool() noexcept { return doc->get_root_value_iterator().get_root_bool(false); }
 simdjson_inline simdjson_result<value> document_reference::get_value() noexcept { return doc->get_value(); }
 simdjson_inline simdjson_result<bool> document_reference::is_null() noexcept { return doc->get_root_value_iterator().is_root_null(false); }
-
+template<> simdjson_inline simdjson_result<array> document_reference::get() & noexcept { return get_array(); }
+template<> simdjson_inline simdjson_result<object> document_reference::get() & noexcept { return get_object(); }
+template<> simdjson_inline simdjson_result<raw_json_string> document_reference::get() & noexcept { return get_raw_json_string(); }
+template<> simdjson_inline simdjson_result<std::string_view> document_reference::get() & noexcept { return get_string(false); }
+template<> simdjson_inline simdjson_result<double> document_reference::get() & noexcept { return get_double(); }
+template<> simdjson_inline simdjson_result<uint64_t> document_reference::get() & noexcept { return get_uint64(); }
+template<> simdjson_inline simdjson_result<int64_t> document_reference::get() & noexcept { return get_int64(); }
+template<> simdjson_inline simdjson_result<bool> document_reference::get() & noexcept { return get_bool(); }
+template<> simdjson_inline simdjson_result<value> document_reference::get() & noexcept { return get_value(); }
 #if SIMDJSON_EXCEPTIONS
+template <class T>
+simdjson_inline document_reference::operator T() noexcept(false) { return get<T>(); }
 simdjson_inline document_reference::operator array() & noexcept(false) { return array(*doc); }
 simdjson_inline document_reference::operator object() & noexcept(false) { return object(*doc); }
 simdjson_inline document_reference::operator uint64_t() noexcept(false) { return get_uint64(); }
 simdjson_inline document_reference::operator int64_t() noexcept(false) { return get_int64(); }
 simdjson_inline document_reference::operator double() noexcept(false) { return get_double(); }
 simdjson_inline document_reference::operator std::string_view() noexcept(false) { return std::string_view(*doc); }
-simdjson_inline document_reference::operator raw_json_string() noexcept(false) { return raw_json_string(*doc); }
+simdjson_inline document_reference::operator raw_json_string() noexcept(false) { return get_raw_json_string(); }
 simdjson_inline document_reference::operator bool() noexcept(false) { return get_bool(); }
 simdjson_inline document_reference::operator value() noexcept(false) { return value(*doc); }
 #endif
@@ -634,6 +685,7 @@ simdjson_inline simdjson_result<value> document_reference::find_field_unordered(
 simdjson_inline simdjson_result<value> document_reference::find_field_unordered(const char *key) & noexcept { return doc->find_field_unordered(key); }
 simdjson_inline simdjson_result<json_type> document_reference::type() noexcept { return doc->type(); }
 simdjson_inline simdjson_result<bool> document_reference::is_scalar() noexcept { return doc->is_scalar(); }
+simdjson_inline simdjson_result<bool> document_reference::is_string() noexcept { return doc->is_string(); }
 simdjson_inline simdjson_result<const char *> document_reference::current_location() noexcept { return doc->current_location(); }
 simdjson_inline int32_t document_reference::current_depth() const noexcept { return doc->current_depth(); }
 simdjson_inline bool document_reference::is_negative() noexcept { return doc->is_negative(); }
@@ -642,6 +694,7 @@ simdjson_inline simdjson_result<number_type> document_reference::get_number_type
 simdjson_inline simdjson_result<number> document_reference::get_number() noexcept { return doc->get_root_value_iterator().get_root_number(false); }
 simdjson_inline simdjson_result<std::string_view> document_reference::raw_json_token() noexcept { return doc->raw_json_token(); }
 simdjson_inline simdjson_result<value> document_reference::at_pointer(std::string_view json_pointer) noexcept { return doc->at_pointer(json_pointer); }
+simdjson_inline simdjson_result<value> document_reference::at_path(std::string_view json_path) noexcept { return doc->at_path(json_path); }
 simdjson_inline simdjson_result<std::string_view> document_reference::raw_json() noexcept { return doc->raw_json();}
 simdjson_inline document_reference::operator document&() const noexcept { return *doc; }
 
@@ -773,6 +826,10 @@ simdjson_inline simdjson_result<bool> simdjson_result<SIMDJSON_IMPLEMENTATION::o
   if (error()) { return error(); }
   return first.is_scalar();
 }
+simdjson_inline simdjson_result<bool> simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::document_reference>::is_string() noexcept {
+  if (error()) { return error(); }
+  return first.is_string();
+}
 simdjson_inline simdjson_result<bool> simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::document_reference>::is_negative() noexcept {
   if (error()) { return error(); }
   return first.is_negative();
@@ -790,6 +847,11 @@ simdjson_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::number> simdj
   return first.get_number();
 }
 #if SIMDJSON_EXCEPTIONS
+template <class T, typename std::enable_if<std::is_same<T, SIMDJSON_IMPLEMENTATION::ondemand::document_reference>::value == false>::type>
+simdjson_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::document_reference>::operator T() noexcept(false) {
+  if (error()) { throw simdjson_error(error()); }
+  return first;
+}
 simdjson_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::document_reference>::operator SIMDJSON_IMPLEMENTATION::ondemand::array() & noexcept(false) {
   if (error()) { throw simdjson_error(error()); }
   return first;
@@ -843,7 +905,13 @@ simdjson_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::value> simdjs
   return first.at_pointer(json_pointer);
 }
 
+simdjson_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::value> simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::document_reference>::at_path(std::string_view json_path) noexcept {
+  if (error()) {
+      return error();
+  }
+  return first.at_path(json_path);
+}
 
 } // namespace simdjson
 
-#endif // SIMDJSON_GENERIC_ONDEMAND_DOCUMENT_INL_H
+#endif // SIMDJSON_GENERIC_ONDEMAND_DOCUMENT_INL_H

include/simdjson/generic/ondemand/document.h

@@ -179,21 +179,23 @@ public:
    * @returns INCORRECT_TYPE If the JSON value is not the given type.
    */
   template<typename T> simdjson_inline simdjson_result<T> get() & noexcept {
-    // Unless the simdjson library provides an inline implementation, calling this method should
+    // Unless the simdjson library or the user provides an inline implementation, calling this method should
     // immediately fail.
     static_assert(!sizeof(T), "The get method with given type is not implemented by the simdjson library. "
       "The supported types are ondemand::object, ondemand::array, raw_json_string, std::string_view, uint64_t, "
       "int64_t, double, and bool. We recommend you use get_double(), get_bool(), get_uint64(), get_int64(), "
-      " get_object(), get_array(), get_raw_json_string(), or get_string() instead of the get template.");
+      " get_object(), get_array(), get_raw_json_string(), or get_string() instead of the get template."
+      " You may also add support for custom types, see our documentation.");
   }
   /** @overload template<typename T> simdjson_result<T> get() & noexcept */
   template<typename T> simdjson_inline simdjson_result<T> get() && noexcept {
-    // Unless the simdjson library provides an inline implementation, calling this method should
+    // Unless the simdjson library or the user provides an inline implementation, calling this method should
     // immediately fail.
     static_assert(!sizeof(T), "The get method with given type is not implemented by the simdjson library. "
       "The supported types are ondemand::object, ondemand::array, raw_json_string, std::string_view, uint64_t, "
       "int64_t, double, and bool. We recommend you use get_double(), get_bool(), get_uint64(), get_int64(), "
-      " get_object(), get_array(), get_raw_json_string(), or get_string() instead of the get template.");
+      " get_object(), get_array(), get_raw_json_string(), or get_string() instead of the get template."
+      " You may also add support for custom types, see our documentation.");
   }
 
   /**
@@ -212,6 +214,17 @@ public:
   template<typename T> simdjson_inline error_code get(T &out) && noexcept;
 
 #if SIMDJSON_EXCEPTIONS
+  /**
+   * Cast this JSON value to an instance of type T. The programmer is responsible for
+   * providing an implementation of get<T> for the type T, if T is not one of the types
+   * supported by the library (object, array, raw_json_string, string_view, uint64_t, etc.)
+   *
+   * See https://github.com/simdjson/simdjson/blob/master/doc/basics.md#adding-support-for-custom-types
+   *
+   * @returns An instance of type T
+   */
+  template <class T>
+  explicit simdjson_inline operator T() noexcept(false);
   /**
    * Cast this JSON value to an array.
    *
@@ -384,7 +397,7 @@ public:
    * APIs assume this. Therefore, you must be explicit if you want to treat objects as out of order.
    *
    * Use find_field() if you are sure fields will be in order (or are willing to treat it as if the
-   * field wasn't there when they aren't).
+   * field was not there when they are not in order).
    *
    * You must consume the fields on an object one at a time. A request for a new key
    * invalidates previous field values: it makes them unsafe. E.g., the array
@@ -430,6 +443,14 @@ public:
    */
   simdjson_inline simdjson_result<bool> is_scalar() noexcept;
 
+  /**
+   * Checks whether the document is a string.
+   *
+   * @returns true if the type is string
+   * @error TAPE_ERROR when the JSON value is a bad token like "}" "," or "alse".
+   */
+  simdjson_inline simdjson_result<bool> is_string() noexcept;
+
   /**
    * Checks whether the document is a negative number.
    *
@@ -457,9 +478,11 @@ public:
    * get_number().get_number_type().
    *
    * get_number_type() is number_type::unsigned_integer if we have
-   * an integer greater or equal to 9223372036854775808
+   * an integer greater or equal to 9223372036854775808 and no larger than 18446744073709551615.
    * get_number_type() is number_type::signed_integer if we have an
-   * integer that is less than 9223372036854775808
+   * integer that is less than 9223372036854775808 and greater or equal to -9223372036854775808.
+   * get_number_type() is number_type::big_integer if we have an integer outside
+   * of those ranges (either larger than 18446744073709551615 or smaller than -9223372036854775808).
    * Otherwise, get_number_type() has value number_type::floating_point_number
    *
    * This function requires processing the number string, but it is expected
@@ -577,6 +600,14 @@ public:
    *   auto doc = parser.iterate(json);
    *   doc.at_pointer("//a/1") == 20
    *
+   * Key values are matched exactly, without unescaping or Unicode normalization.
+   * We do a byte-by-byte comparison. E.g.
+   *
+   *   const padded_string json = "{\"\\u00E9\":123}"_padded;
+   *   auto doc = parser.iterate(json);
+   *   doc.at_pointer("/\\u00E9") == 123
+   *   doc.at_pointer((const char*)u8"/\u00E9") returns an error (NO_SUCH_FIELD)
+   *
    * Note that at_pointer() automatically calls rewind between each call. Thus
    * all values, objects and arrays that you have created so far (including unescaped strings)
    * are invalidated. After calling at_pointer, you need to consume the result: string values
@@ -593,6 +624,30 @@ public:
    *         - SCALAR_DOCUMENT_AS_VALUE if the json_pointer is empty and the document is not a scalar (see is_scalar() function).
    */
   simdjson_inline simdjson_result<value> at_pointer(std::string_view json_pointer) noexcept;
+
+  /**
+   * Get the value associated with the given JSONPath expression. We only support
+   * JSONPath queries that trivially convertible to JSON Pointer queries: key
+   * names and array indices.
+   *
+   * https://datatracker.ietf.org/doc/html/draft-normington-jsonpath-00
+   *
+   * Key values are matched exactly, without unescaping or Unicode normalization.
+   * We do a byte-by-byte comparison. E.g.
+   *
+   *   const padded_string json = "{\"\\u00E9\":123}"_padded;
+   *   auto doc = parser.iterate(json);
+   *   doc.at_path(".\\u00E9") == 123
+   *   doc.at_path((const char*)u8".\u00E9") returns an error (NO_SUCH_FIELD)
+   *
+   * @return The value associated with the given JSONPath expression, or:
+   *         - INVALID_JSON_POINTER if the JSONPath to JSON Pointer conversion fails
+   *         - NO_SUCH_FIELD if a field does not exist in an object
+   *         - INDEX_OUT_OF_BOUNDS if an array index is larger than an array length
+   *         - INCORRECT_TYPE if a non-integer is used to access an array
+   */
+  simdjson_inline simdjson_result<value> at_path(std::string_view json_path) noexcept;
+
   /**
    * Consumes the document and returns a string_view instance corresponding to the
    * document as represented in JSON. It points inside the original byte array containing
@@ -658,10 +713,12 @@ public:
   simdjson_inline simdjson_result<value> get_value() noexcept;
 
   simdjson_inline simdjson_result<bool> is_null() noexcept;
+  template<typename T> simdjson_inline simdjson_result<T> get() & noexcept;
   simdjson_inline simdjson_result<std::string_view> raw_json() noexcept;
   simdjson_inline operator document&() const noexcept;
-
 #if SIMDJSON_EXCEPTIONS
+  template <class T>
+  explicit simdjson_inline operator T() noexcept(false);
   simdjson_inline operator array() & noexcept(false);
   simdjson_inline operator object() & noexcept(false);
   simdjson_inline operator uint64_t() noexcept(false);
@@ -686,6 +743,7 @@ public:
 
   simdjson_inline simdjson_result<json_type> type() noexcept;
   simdjson_inline simdjson_result<bool> is_scalar() noexcept;
+  simdjson_inline simdjson_result<bool> is_string() noexcept;
 
   simdjson_inline simdjson_result<const char *> current_location() noexcept;
   simdjson_inline int32_t current_depth() const noexcept;
@@ -695,6 +753,8 @@ public:
   simdjson_inline simdjson_result<number> get_number() noexcept;
   simdjson_inline simdjson_result<std::string_view> raw_json_token() noexcept;
   simdjson_inline simdjson_result<value> at_pointer(std::string_view json_pointer) noexcept;
+  simdjson_inline simdjson_result<value> at_path(std::string_view json_path) noexcept;
+
 private:
   document *doc{nullptr};
 };
@@ -734,8 +794,9 @@ public:
 
   template<typename T> simdjson_inline error_code get(T &out) & noexcept;
   template<typename T> simdjson_inline error_code get(T &out) && noexcept;
-
 #if SIMDJSON_EXCEPTIONS
+  template <class T, typename std::enable_if<std::is_same<T, SIMDJSON_IMPLEMENTATION::ondemand::document>::value == false>::type>
+  explicit simdjson_inline operator T() noexcept(false);
   simdjson_inline operator SIMDJSON_IMPLEMENTATION::ondemand::array() & noexcept(false);
   simdjson_inline operator SIMDJSON_IMPLEMENTATION::ondemand::object() & noexcept(false);
   simdjson_inline operator uint64_t() noexcept(false);
@@ -759,6 +820,7 @@ public:
   simdjson_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::value> find_field_unordered(const char *key) & noexcept;
   simdjson_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::json_type> type() noexcept;
   simdjson_inline simdjson_result<bool> is_scalar() noexcept;
+  simdjson_inline simdjson_result<bool> is_string() noexcept;
   simdjson_inline simdjson_result<const char *> current_location() noexcept;
   simdjson_inline int32_t current_depth() const noexcept;
   simdjson_inline bool at_end() const noexcept;
@@ -770,6 +832,7 @@ public:
   simdjson_inline simdjson_result<std::string_view> raw_json_token() noexcept;
 
   simdjson_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::value> at_pointer(std::string_view json_pointer) noexcept;
+  simdjson_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::value> at_path(std::string_view json_path) noexcept;
 };
 
 
@@ -802,8 +865,9 @@ public:
   simdjson_inline simdjson_result<bool> get_bool() noexcept;
   simdjson_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::value> get_value() noexcept;
   simdjson_inline simdjson_result<bool> is_null() noexcept;
-
 #if SIMDJSON_EXCEPTIONS
+  template <class T, typename std::enable_if<std::is_same<T, SIMDJSON_IMPLEMENTATION::ondemand::document_reference>::value == false>::type>
+  explicit simdjson_inline operator T() noexcept(false);
   simdjson_inline operator SIMDJSON_IMPLEMENTATION::ondemand::array() & noexcept(false);
   simdjson_inline operator SIMDJSON_IMPLEMENTATION::ondemand::object() & noexcept(false);
   simdjson_inline operator uint64_t() noexcept(false);
@@ -827,6 +891,7 @@ public:
   simdjson_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::value> find_field_unordered(const char *key) & noexcept;
   simdjson_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::json_type> type() noexcept;
   simdjson_inline simdjson_result<bool> is_scalar() noexcept;
+  simdjson_inline simdjson_result<bool> is_string() noexcept;
   simdjson_inline simdjson_result<const char *> current_location() noexcept;
   simdjson_inline simdjson_result<int32_t> current_depth() const noexcept;
   simdjson_inline simdjson_result<bool> is_negative() noexcept;
@@ -837,9 +902,10 @@ public:
   simdjson_inline simdjson_result<std::string_view> raw_json_token() noexcept;
 
   simdjson_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::value> at_pointer(std::string_view json_pointer) noexcept;
+  simdjson_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::value> at_path(std::string_view json_path) noexcept;
 };
 
 
 } // namespace simdjson
 
-#endif // SIMDJSON_GENERIC_ONDEMAND_DOCUMENT_H
+#endif // SIMDJSON_GENERIC_ONDEMAND_DOCUMENT_H

include/simdjson/generic/ondemand/document_stream.h

@@ -122,10 +122,9 @@ public:
   class iterator {
   public:
     using value_type = simdjson_result<document>;
-    using reference  = value_type;
-
+    using reference  = simdjson_result<ondemand::document_reference>;
+    using pointer    = void;
     using difference_type   = std::ptrdiff_t;
-
     using iterator_category = std::input_iterator_tag;
 
     /**
@@ -135,7 +134,7 @@ public:
     /**
      * Get the current document (or error).
      */
-    simdjson_inline simdjson_result<ondemand::document_reference> operator*() noexcept;
+    simdjson_inline reference operator*() noexcept;
     /**
      * Advance to the next document (prefix).
      */
@@ -335,4 +334,4 @@ public:
 
 } // namespace simdjson
 
-#endif // SIMDJSON_GENERIC_ONDEMAND_DOCUMENT_STREAM_H
+#endif // SIMDJSON_GENERIC_ONDEMAND_DOCUMENT_STREAM_H

include/simdjson/generic/ondemand/field-inl.h

@@ -12,7 +12,7 @@ namespace simdjson {
 namespace SIMDJSON_IMPLEMENTATION {
 namespace ondemand {
 
-// clang 6 doesn't think the default constructor can be noexcept, so we make it explicit
+// clang 6 does not think the default constructor can be noexcept, so we make it explicit
 simdjson_inline field::field() noexcept : std::pair<raw_json_string, ondemand::value>() {}
 
 simdjson_inline field::field(raw_json_string key, ondemand::value &&value) noexcept
@@ -43,6 +43,19 @@ simdjson_inline raw_json_string field::key() const noexcept {
   return first;
 }
 
+
+simdjson_inline std::string_view field::key_raw_json_token() const noexcept {
+  SIMDJSON_ASSUME(first.buf != nullptr); // We would like to call .alive() by Visual Studio won't let us.
+  return std::string_view(reinterpret_cast<const char*>(first.buf-1), second.iter._json_iter->token.peek(-1) - first.buf + 1);
+}
+
+simdjson_inline std::string_view field::escaped_key() const noexcept {
+  SIMDJSON_ASSUME(first.buf != nullptr); // We would like to call .alive() by Visual Studio won't let us.
+  auto end_quote = second.iter._json_iter->token.peek(-1);
+  while(*end_quote != '"') end_quote--;
+  return std::string_view(reinterpret_cast<const char*>(first.buf), end_quote - first.buf);
+}
+
 simdjson_inline value &field::value() & noexcept {
   return second;
 }
@@ -76,10 +89,22 @@ simdjson_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::raw_json_stri
   if (error()) { return error(); }
   return first.key();
 }
+
+simdjson_inline simdjson_result<std::string_view> simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::field>::key_raw_json_token() noexcept {
+  if (error()) { return error(); }
+  return first.key_raw_json_token();
+}
+
+simdjson_inline simdjson_result<std::string_view> simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::field>::escaped_key() noexcept {
+  if (error()) { return error(); }
+  return first.escaped_key();
+}
+
 simdjson_inline simdjson_result<std::string_view> simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::field>::unescaped_key(bool allow_replacement) noexcept {
   if (error()) { return error(); }
   return first.unescaped_key(allow_replacement);
 }
+
 simdjson_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::value> simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::field>::value() noexcept {
   if (error()) { return error(); }
   return std::move(first.value());

include/simdjson/generic/ondemand/field.h

@@ -42,6 +42,17 @@ public:
    * an unescaped C string: e.g., key() == "test".
    */
   simdjson_inline raw_json_string key() const noexcept;
+  /**
+   * Get the unprocessed key as a string_view. This includes the quotes and may include
+   * some spaces after the last quote.
+   */
+  simdjson_inline std::string_view key_raw_json_token() const noexcept;
+  /**
+   * Get the key as a string_view. This does not include the quotes and
+   * the string is unprocessed key so it may contain escape characters
+   * (e.g., \uXXXX or \n). Use unescaped_key() to get the unescaped key.
+   */
+  simdjson_inline std::string_view escaped_key() const noexcept;
   /**
    * Get the field value.
    */
@@ -74,6 +85,8 @@ public:
 
   simdjson_inline simdjson_result<std::string_view> unescaped_key(bool allow_replacement = false) noexcept;
   simdjson_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::raw_json_string> key() noexcept;
+  simdjson_inline simdjson_result<std::string_view> key_raw_json_token() noexcept;
+  simdjson_inline simdjson_result<std::string_view> escaped_key() noexcept;
   simdjson_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::value> value() noexcept;
 };
 

include/simdjson/generic/ondemand/json_iterator-inl.h

@@ -286,6 +286,12 @@ simdjson_inline uint32_t json_iterator::peek_length(token_position position) con
 #endif // SIMDJSON_CHECK_EOF
   return token.peek_length(position);
 }
+simdjson_inline uint32_t json_iterator::peek_root_length(token_position position) const noexcept {
+#if SIMDJSON_CHECK_EOF
+  assert_valid_position(position);
+#endif // SIMDJSON_CHECK_EOF
+  return token.peek_root_length(position);
+}
 
 simdjson_inline token_position json_iterator::last_position() const noexcept {
   // The following line fails under some compilers...

include/simdjson/generic/ondemand/json_iterator.h

@@ -146,7 +146,7 @@ public:
    * @param delta The relative position of the token to retrieve. e.g. 0 = next token, -1 = prev token.
    *
    * TODO consider a string_view, assuming the length will get stripped out by the optimizer when
-   * it isn't used ...
+   * it is not used ...
    */
   simdjson_inline const uint8_t *peek(int32_t delta=0) const noexcept;
   /**
@@ -174,7 +174,7 @@ public:
    * @param position The position of the token to retrieve.
    *
    * TODO consider a string_view, assuming the length will get stripped out by the optimizer when
-   * it isn't used ...
+   * it is not used ...
    */
   simdjson_inline const uint8_t *peek(token_position position) const noexcept;
   /**
@@ -185,13 +185,21 @@ public:
    * @param position The position of the token to retrieve.
    */
   simdjson_inline uint32_t peek_length(token_position position) const noexcept;
+  /**
+   * Get the maximum length of the JSON text for the current root token.
+   *
+   * The length will include any whitespace at the end of the token.
+   *
+   * @param position The position of the token to retrieve.
+   */
+  simdjson_inline uint32_t peek_root_length(token_position position) const noexcept;
   /**
    * Get the JSON text for the last token in the document.
    *
    * This is not null-terminated; it is a view into the JSON.
    *
    * TODO consider a string_view, assuming the length will get stripped out by the optimizer when
-   * it isn't used ...
+   * it is not used ...
    */
   simdjson_inline const uint8_t *peek_last() const noexcept;
 
@@ -300,6 +308,7 @@ protected:
   friend class raw_json_string;
   friend class parser;
   friend class value_iterator;
+  friend class field;
   template <typename... Args>
   friend simdjson_inline void logger::log_line(const json_iterator &iter, const char *title_prefix, const char *title, std::string_view detail, int delta, int depth_delta, logger::log_level level, Args&&... args) noexcept;
   template <typename... Args>

include/simdjson/generic/ondemand/json_path_to_pointer_conversion-inl.h

@@ -0,0 +1,67 @@
+#pragma once
+
+#ifndef SIMDJSON_ONDEMAND_GENERIC_JSON_PATH_TO_POINTER_CONVERSION_INL_H
+#define SIMDJSON_ONDEMAND_GENERIC_JSON_PATH_TO_POINTER_CONVERSION_INL_H
+
+#ifndef SIMDJSON_CONDITIONAL_INCLUDE
+#define SIMDJSON_GENERIC_ONDEMAND_JSON_PATH_TO_POINTER_CONVERSION_INL_H
+#include "simdjson/generic/ondemand/json_path_to_pointer_conversion.h"
+#endif // SIMDJSON_CONDITIONAL_INCLUDE
+
+namespace simdjson {
+namespace SIMDJSON_IMPLEMENTATION {}
+namespace ondemand {
+
+simdjson_inline std::string json_path_to_pointer_conversion(std::string_view json_path) {
+  if (json_path.empty() || (json_path.front() != '.' && json_path.front() != '[') {
+    return "-1"; // Sentinel value to be handled as an error by the caller.
+  }
+
+  std::string result;
+  // Reserve space to reduce allocations, adjusting for potential increases due
+  // to escaping.
+  result.reserve(json_path.size() * 2);
+
+  // Skip the initial '.' as it's assumed every path starts with it.
+  size_t i = 0;
+
+  while (i < json_path.length()) {
+    if (json_path[i] == '.') {
+      result += '/';
+    } else if (json_path[i] == '[') {
+      result += '/';
+      ++i; // Move past the '['
+      while (i < json_path.length() && json_path[i] != ']') {
+        if (json_path[i] == '~') {
+          result += "~0";
+        } else if (json_path[i] == '/') {
+          result += "~1";
+        } else {
+          result += json_path[i];
+        }
+        ++i;
+      }
+      if (i == json_path.length() || json_path[i] != ']') {
+        return "-1"; // Returning sentinel value that will be handled as an error by the caller
+      }
+    } else {
+      if (json_path[i] == '~') {
+        result += "~0";
+      } else if (json_path[i] == '/') {
+        result += "~1";
+      } else {
+        result += json_path[i];
+      }
+    }
+    ++i;
+  }
+
+  return simdjson_result<std::string>(result);
+}
+
+
+} // namespace ondemand
+} // namespace SIMDJSON_IMPLEMENTATION
+} // namespace simdjson
+
+#endif // SIMDJSON_ONDEMAND_GENERIC_JSON_PATH_TO_POINTER_CONVERSION_INL_H

include/simdjson/generic/ondemand/json_path_to_pointer_conversion.h

@@ -0,0 +1,22 @@
+#pragma once
+
+#ifndef SIMDJSON_ONDEMAND_GENERIC_JSON_PATH_TO_POINTER_CONVERSION_H
+#define SIMDJSON_ONDEMAND_GENERIC_JSON_PATH_TO_POINTER_CONVERSION_H
+
+namespace simdjson {
+namespace SIMDJSON_IMPLEMENTATION {
+namespace internal {
+
+/**
+ * Converts JSONPath to JSON Pointer.
+ * @param json_path The JSONPath string to be converted.
+ * @return A string containing the equivalent JSON Pointer.
+ * @throws simdjson_error If the conversion fails.
+ */
+simdjson_inline std::string json_path_to_pointer_conversion(std::string_view json_path);
+
+} // namespace internal
+} // namespace SIMDJSON_IMPLEMENTATION
+} // namespace simdjson
+
+#endif // SIMDJSON_JSON_PATH_TO_POINTER_CONVERSION_H

include/simdjson/generic/ondemand/json_type-inl.h

@@ -48,7 +48,6 @@ simdjson_inline number::operator uint64_t() const noexcept {
   return get_uint64();
 }
 
-
 simdjson_inline bool number::is_int64() const noexcept {
   return get_number_type() == number_type::signed_integer;
 }

include/simdjson/generic/ondemand/json_type.h

@@ -92,8 +92,6 @@ protected:
    */
   friend class value_iterator;
   template<typename W>
-  friend error_code numberparsing::slow_float_parsing(simdjson_unused const uint8_t * src, W writer);
-  template<typename W>
   friend error_code numberparsing::write_float(const uint8_t *const src, bool negative, uint64_t i, const uint8_t * start_digits, size_t digit_count, int64_t exponent, W &writer);
   template<typename W>
   friend error_code numberparsing::parse_number(const uint8_t *const src, W &writer);

include/simdjson/generic/ondemand/object-inl.h

@@ -164,6 +164,14 @@ inline simdjson_result<value> object::at_pointer(std::string_view json_pointer)
   return child;
 }
 
+inline simdjson_result<value> object::at_path(std::string_view json_path) noexcept {
+  auto json_pointer = json_path_to_pointer_conversion(json_path);
+  if (json_pointer == "-1") {
+    return INVALID_JSON_POINTER;
+  }
+  return at_pointer(json_pointer);
+}
+
 simdjson_inline simdjson_result<size_t> object::count_fields() & noexcept {
   size_t count{0};
   // Important: we do not consume any of the values.
@@ -236,6 +244,14 @@ simdjson_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::value> simdjs
   return first.at_pointer(json_pointer);
 }
 
+simdjson_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::value> simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::object>::at_path(
+    std::string_view json_path) noexcept {
+  if (error()) {
+    return error();
+  }
+  return first.at_path(json_path);
+}
+
 inline simdjson_result<bool> simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::object>::reset() noexcept {
   if (error()) { return error(); }
   return first.reset();
@@ -257,4 +273,4 @@ simdjson_inline  simdjson_result<std::string_view> simdjson_result<SIMDJSON_IMPL
 }
 } // namespace simdjson
 
-#endif // SIMDJSON_GENERIC_ONDEMAND_OBJECT_INL_H
+#endif // SIMDJSON_GENERIC_ONDEMAND_OBJECT_INL_H

include/simdjson/generic/ondemand/object.h

@@ -56,6 +56,8 @@ public:
    * key a single time. Doing object["mykey"].to_string() and then again object["mykey"].to_string()
    * is an error.
    *
+   * If you expect to have keys with escape characters, please review our documentation.
+   *
    * @param key The key to look up.
    * @returns The value of the field, or NO_SUCH_FIELD if the field is not in the object.
    */
@@ -77,7 +79,7 @@ public:
    * APIs assume this. Therefore, you must be explicit if you want to treat objects as out of order.
    *
    * Use find_field() if you are sure fields will be in order (or are willing to treat it as if the
-   * field wasn't there when they aren't).
+   * field was not there when they are not in order).
    *
    * If you have multiple fields with a matching key ({"x": 1,  "x": 1}) be mindful
    * that only one field is returned.
@@ -93,6 +95,8 @@ public:
    * You are expected to access keys only once. You should access the value corresponding to a key
    * a single time. Doing object["mykey"].to_string() and then again object["mykey"].to_string() is an error.
    *
+   * If you expect to have keys with escape characters, please review our documentation.
+   *
    * @param key The key to look up.
    * @returns The value of the field, or NO_SUCH_FIELD if the field is not in the object.
    */
@@ -140,6 +144,19 @@ public:
    */
   inline simdjson_result<value> at_pointer(std::string_view json_pointer) noexcept;
 
+  /**
+   * Get the value associated with the given JSONPath expression. We only support
+   * JSONPath queries that trivially convertible to JSON Pointer queries: key
+   * names and array indices.
+   *
+   * @return The value associated with the given JSONPath expression, or:
+   *         - INVALID_JSON_POINTER if the JSONPath to JSON Pointer conversion fails
+   *         - NO_SUCH_FIELD if a field does not exist in an object
+   *         - INDEX_OUT_OF_BOUNDS if an array index is larger than an array length
+   *         - INCORRECT_TYPE if a non-integer is used to access an array
+   */
+  inline simdjson_result<value> at_path(std::string_view json_path) noexcept;
+
   /**
    * Reset the iterator so that we are pointing back at the
    * beginning of the object. You should still consume values only once even if you
@@ -227,6 +244,8 @@ public:
   simdjson_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::value> operator[](std::string_view key) & noexcept;
   simdjson_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::value> operator[](std::string_view key) && noexcept;
   simdjson_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::value> at_pointer(std::string_view json_pointer) noexcept;
+  simdjson_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::value> at_path(std::string_view json_path) noexcept;
+
   inline simdjson_result<bool> reset() noexcept;
   inline simdjson_result<bool> is_empty() noexcept;
   inline simdjson_result<size_t> count_fields() & noexcept;
@@ -236,4 +255,4 @@ public:
 
 } // namespace simdjson
 
-#endif // SIMDJSON_GENERIC_ONDEMAND_OBJECT_H
+#endif // SIMDJSON_GENERIC_ONDEMAND_OBJECT_H

include/simdjson/generic/ondemand/token_iterator-inl.h

@@ -37,6 +37,11 @@ simdjson_inline uint32_t token_iterator::peek_length(token_position position) co
   return *(position+1) - *position;
 }
 
+simdjson_inline uint32_t token_iterator::peek_root_length(token_position position) const noexcept {
+  return *(position+2) - *(position) > *(position+1) - *(position) ?
+      *(position+1) - *(position)
+      : *(position+2) - *(position);
+}
 simdjson_inline const uint8_t *token_iterator::peek(int32_t delta) const noexcept {
   return &buf[*(_position+delta)];
 }

include/simdjson/generic/ondemand/token_iterator.h

@@ -47,7 +47,7 @@ public:
    *              1 = next token, -1 = prev token.
    *
    * TODO consider a string_view, assuming the length will get stripped out by the optimizer when
-   * it isn't used ...
+   * it is not used...
    */
   simdjson_inline const uint8_t *peek(int32_t delta=0) const noexcept;
   /**
@@ -77,7 +77,14 @@ public:
    * @param position The position of the token.
    */
   simdjson_inline uint32_t peek_length(token_position position) const noexcept;
-
+  /**
+   * Get the maximum length of the JSON text for a root token.
+   *
+   * The length will include any whitespace at the end of the token.
+   *
+   * @param position The position of the token (start of the document).
+   */
+  simdjson_inline uint32_t peek_root_length(token_position position) const noexcept;
   /**
    * Return the current index.
    */

include/simdjson/generic/ondemand/value-inl.h

@@ -6,6 +6,8 @@
 #include "simdjson/generic/ondemand/array.h"
 #include "simdjson/generic/ondemand/array_iterator.h"
 #include "simdjson/generic/ondemand/json_iterator.h"
+#include "simdjson/generic/ondemand/json_path_to_pointer_conversion.h"
+#include "simdjson/generic/ondemand/json_path_to_pointer_conversion-inl.h"
 #include "simdjson/generic/ondemand/json_type.h"
 #include "simdjson/generic/ondemand/object.h"
 #include "simdjson/generic/ondemand/raw_json_string.h"
@@ -93,6 +95,10 @@ template<typename T> simdjson_inline error_code value::get(T &out) noexcept {
 }
 
 #if SIMDJSON_EXCEPTIONS
+template <class T>
+simdjson_inline value::operator T() noexcept(false) {
+  return get<T>();
+}
 simdjson_inline value::operator array() noexcept(false) {
   return get_array();
 }
@@ -179,6 +185,14 @@ simdjson_inline simdjson_result<bool> value::is_scalar() noexcept {
   return ! ((this_type == json_type::array) || (this_type == json_type::object));
 }
 
+simdjson_inline simdjson_result<bool> value::is_string() noexcept {
+  json_type this_type;
+  auto error = type().get(this_type);
+  if(error) { return error; }
+  return (this_type == json_type::string);
+}
+
+
 simdjson_inline bool value::is_negative() noexcept {
   return iter.is_negative();
 }
@@ -239,6 +253,19 @@ simdjson_inline simdjson_result<value> value::at_pointer(std::string_view json_p
   }
 }
 
+simdjson_inline simdjson_result<value> value::at_path(std::string_view json_path) noexcept {
+  json_type t;
+  SIMDJSON_TRY(type().get(t));
+  switch (t) {
+  case json_type::array:
+      return (*this).get_array().at_path(json_path);
+  case json_type::object:
+      return (*this).get_object().at_path(json_path);
+  default:
+      return INVALID_JSON_POINTER;
+  }
+}
+
 } // namespace ondemand
 } // namespace SIMDJSON_IMPLEMENTATION
 } // namespace simdjson
@@ -392,6 +419,10 @@ simdjson_inline simdjson_result<bool> simdjson_result<SIMDJSON_IMPLEMENTATION::o
   if (error()) { return error(); }
   return first.is_scalar();
 }
+simdjson_inline simdjson_result<bool> simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::value>::is_string() noexcept {
+  if (error()) { return error(); }
+  return first.is_string();
+}
 simdjson_inline simdjson_result<bool> simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::value>::is_negative() noexcept {
   if (error()) { return error(); }
   return first.is_negative();
@@ -409,6 +440,11 @@ simdjson_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::number> simdj
   return first.get_number();
 }
 #if SIMDJSON_EXCEPTIONS
+template <class T>
+simdjson_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::value>::operator T() noexcept(false) {
+  if (error()) { throw simdjson_error(error()); }
+  return static_cast<T>(first);
+}
 simdjson_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::value>::operator SIMDJSON_IMPLEMENTATION::ondemand::array() noexcept(false) {
   if (error()) { throw simdjson_error(error()); }
   return first;
@@ -463,11 +499,22 @@ simdjson_inline simdjson_result<int32_t> simdjson_result<SIMDJSON_IMPLEMENTATION
   return first.current_depth();
 }
 
-simdjson_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::value> simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::value>::at_pointer(std::string_view json_pointer) noexcept {
-  if (error()) { return error(); }
+simdjson_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::value> simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::value>::at_pointer(
+    std::string_view json_pointer) noexcept {
+  if (error()) {
+      return error();
+  }
   return first.at_pointer(json_pointer);
 }
 
+simdjson_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::value> simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::value>::at_path(
+      std::string_view json_path) noexcept {
+  if (error()) {
+    return error();
+  }
+  return first.at_path(json_path);
+}
+
 } // namespace simdjson
 
-#endif // SIMDJSON_GENERIC_ONDEMAND_VALUE_INL_H
+#endif // SIMDJSON_GENERIC_ONDEMAND_VALUE_INL_H

include/simdjson/generic/ondemand/value.h

@@ -36,12 +36,13 @@ public:
    * @returns INCORRECT_TYPE If the JSON value is not the given type.
    */
   template<typename T> simdjson_inline simdjson_result<T> get() noexcept {
-    // Unless the simdjson library provides an inline implementation, calling this method should
+    // Unless the simdjson library or the user provides an inline implementation, calling this method should
     // immediately fail.
     static_assert(!sizeof(T), "The get method with given type is not implemented by the simdjson library. "
       "The supported types are ondemand::object, ondemand::array, raw_json_string, std::string_view, uint64_t, "
       "int64_t, double, and bool. We recommend you use get_double(), get_bool(), get_uint64(), get_int64(), "
-      " get_object(), get_array(), get_raw_json_string(), or get_string() instead of the get template.");
+      " get_object(), get_array(), get_raw_json_string(), or get_string() instead of the get template."
+      " You may also add support for custom types, see our documentation.");
   }
 
   /**
@@ -194,6 +195,17 @@ public:
   simdjson_inline simdjson_result<bool> is_null() noexcept;
 
 #if SIMDJSON_EXCEPTIONS
+  /**
+   * Cast this JSON value to an instance of type T. The programmer is responsible for
+   * providing an implementation of get<T> for the type T, if T is not one of the types
+   * supported by the library (object, array, raw_json_string, string_view, uint64_t, etc.).
+   *
+   * See https://github.com/simdjson/simdjson/blob/master/doc/basics.md#adding-support-for-custom-types
+   *
+   * @returns An instance of type T
+   */
+  template <class T>
+  explicit simdjson_inline operator T() noexcept(false);
   /**
    * Cast this JSON value to an array.
    *
@@ -357,7 +369,7 @@ public:
    * that only one field is returned.
    *
    * Use find_field() if you are sure fields will be in order (or are willing to treat it as if the
-   * field wasn't there when they aren't).
+   * field as not there when they are not in order).
    *
    * @param key The key to look up.
    * @returns The value of the field, or NO_SUCH_FIELD if the field is not in the object.
@@ -393,6 +405,13 @@ public:
    * @error TAPE_ERROR when the JSON value is a bad token like "}" "," or "alse".
    */
   simdjson_inline simdjson_result<bool> is_scalar() noexcept;
+  /**
+   * Checks whether the value is a string.
+   *
+   * @returns true if the type is string
+   * @error TAPE_ERROR when the JSON value is a bad token like "}" "," or "alse".
+   */
+  simdjson_inline simdjson_result<bool> is_string() noexcept;
 
   /**
    * Checks whether the value is a negative number.
@@ -425,10 +444,12 @@ public:
    * get_number().get_number_type().
    *
    * get_number_type() is number_type::unsigned_integer if we have
-   * an integer greater or equal to 9223372036854775808
+   * an integer greater or equal to 9223372036854775808.
    * get_number_type() is number_type::signed_integer if we have an
-   * integer that is less than 9223372036854775808
-   * Otherwise, get_number_type() has value number_type::floating_point_number
+   * integer that is less than 9223372036854775808.
+   * get_number_type() is number_type::big_integer for integers that do not fit in 64 bits,
+   * in which case the digit_count is set to the length of the big integer string.
+   * Otherwise, get_number_type() has value number_type::floating_point_number.
    *
    * This function requires processing the number string, but it is expected
    * to be faster than get_number().get_number_type() because it is does not
@@ -455,6 +476,8 @@ public:
    * You can recover the value by calling number.get_uint64() and you
    * have that number.is_uint64() is true.
    *
+   * For integers that do not fit in 64 bits, the function returns BIGINT_ERROR error code.
+   *
    * Otherwise, number.get_number_type() has value number_type::floating_point_number
    * and we have a binary64 number.
    * You can recover the value by calling number.get_double() and you
@@ -470,7 +493,6 @@ public:
    */
   simdjson_warn_unused simdjson_inline simdjson_result<number> get_number() noexcept;
 
-
   /**
    * Get the raw JSON for this token.
    *
@@ -568,6 +590,20 @@ public:
    */
   simdjson_inline simdjson_result<value> at_pointer(std::string_view json_pointer) noexcept;
 
+  /**
+   * Get the value associated with the given JSONPath expression. We only support
+   * JSONPath queries that trivially convertible to JSON Pointer queries: key
+   * names and array indices.
+   *
+   * @return The value associated with the given JSONPath expression, or:
+   *         - INVALID_JSON_POINTER if the JSONPath to JSON Pointer conversion fails
+   *         - NO_SUCH_FIELD if a field does not exist in an object
+   *         - INDEX_OUT_OF_BOUNDS if an array index is larger than an array length
+   *         - INCORRECT_TYPE if a non-integer is used to access an array
+   */
+  simdjson_inline simdjson_result<value> at_path(std::string_view at_path) noexcept;
+
+
 protected:
   /**
    * Create a value.
@@ -607,6 +643,7 @@ protected:
   friend class object;
   friend struct simdjson_result<value>;
   friend struct simdjson_result<field>;
+  friend class field;
 };
 
 } // namespace ondemand
@@ -644,6 +681,8 @@ public:
   template<typename T> simdjson_inline error_code get(T &out) noexcept;
 
 #if SIMDJSON_EXCEPTIONS
+  template <class T>
+  explicit simdjson_inline operator T() noexcept(false);
   simdjson_inline operator SIMDJSON_IMPLEMENTATION::ondemand::array() noexcept(false);
   simdjson_inline operator SIMDJSON_IMPLEMENTATION::ondemand::object() noexcept(false);
   simdjson_inline operator uint64_t() noexcept(false);
@@ -697,7 +736,7 @@ public:
    * APIs assume this. Therefore, you must be explicit if you want to treat objects as out of order.
    *
    * Use find_field() if you are sure fields will be in order (or are willing to treat it as if the
-   * field wasn't there when they aren't).
+   * field as not there when they are not in order).
    *
    * @param key The key to look up.
    * @returns The value of the field, or NO_SUCH_FIELD if the field is not in the object.
@@ -719,6 +758,7 @@ public:
    */
   simdjson_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::json_type> type() noexcept;
   simdjson_inline simdjson_result<bool> is_scalar() noexcept;
+  simdjson_inline simdjson_result<bool> is_string() noexcept;
   simdjson_inline simdjson_result<bool> is_negative() noexcept;
   simdjson_inline simdjson_result<bool> is_integer() noexcept;
   simdjson_inline simdjson_result<SIMDJSON_IMPLEMENTATION::number_type> get_number_type() noexcept;
@@ -733,8 +773,9 @@ public:
   /** @copydoc simdjson_inline int32_t current_depth() const noexcept */
   simdjson_inline simdjson_result<int32_t> current_depth() const noexcept;
   simdjson_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::value> at_pointer(std::string_view json_pointer) noexcept;
+  simdjson_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::value> at_path(std::string_view json_path) noexcept;
 };
 
 } // namespace simdjson
 
-#endif // SIMDJSON_GENERIC_ONDEMAND_VALUE_H
+#endif // SIMDJSON_GENERIC_ONDEMAND_VALUE_H

include/simdjson/generic/ondemand/value_iterator-inl.h

@@ -137,7 +137,7 @@ simdjson_warn_unused simdjson_inline simdjson_result<bool> value_iterator::find_
   } else if (!is_open()) {
 #if SIMDJSON_DEVELOPMENT_CHECKS
     // If we're past the end of the object, we're being iterated out of order.
-    // Note: this isn't perfect detection. It's possible the user is inside some other object; if so,
+    // Note: this is not perfect detection. It's possible the user is inside some other object; if so,
     // this object iterator will blithely scan that object for fields.
     if (_json_iter->depth() < depth() - 1) { return OUT_OF_ORDER_ITERATION; }
 #endif
@@ -249,7 +249,7 @@ simdjson_warn_unused simdjson_inline simdjson_result<bool> value_iterator::find_
 
 #if SIMDJSON_DEVELOPMENT_CHECKS
     // If we're past the end of the object, we're being iterated out of order.
-    // Note: this isn't perfect detection. It's possible the user is inside some other object; if so,
+    // Note: this is not perfect detection. It's possible the user is inside some other object; if so,
     // this object iterator will blithely scan that object for fields.
     if (_json_iter->depth() < depth() - 1) { return OUT_OF_ORDER_ITERATION; }
 #endif
@@ -591,7 +591,7 @@ simdjson_inline simdjson_result<number> value_iterator::get_number() noexcept {
 }
 
 simdjson_inline simdjson_result<bool> value_iterator::is_root_integer(bool check_trailing) noexcept {
-  auto max_len = peek_start_length();
+  auto max_len = peek_root_length();
   auto json = peek_root_scalar("is_root_integer");
   uint8_t tmpbuf[20+1+1]{}; // <20 digits> is the longest possible unsigned integer
   tmpbuf[20+1] = '\0'; // make sure that buffer is always null terminated.
@@ -607,7 +607,7 @@ simdjson_inline simdjson_result<bool> value_iterator::is_root_integer(bool check
 }
 
 simdjson_inline simdjson_result<SIMDJSON_IMPLEMENTATION::number_type> value_iterator::get_root_number_type(bool check_trailing) noexcept {
-  auto max_len = peek_start_length();
+  auto max_len = peek_root_length();
   auto json = peek_root_scalar("number");
   // Per https://www.exploringbinary.com/maximum-number-of-decimal-digits-in-binary-floating-point-numbers/,
   // 1074 is the maximum number of significant fractional digits. Add 8 more digits for the biggest
@@ -615,7 +615,12 @@ simdjson_inline simdjson_result<SIMDJSON_IMPLEMENTATION::number_type> value_iter
   uint8_t tmpbuf[1074+8+1+1];
   tmpbuf[1074+8+1] = '\0'; // make sure that buffer is always null terminated.
   if (!_json_iter->copy_to_buffer(json, max_len, tmpbuf, 1074+8+1)) {
-    logger::log_error(*_json_iter, start_position(), depth(), "Root number more than 1082 characters");
+    if(numberparsing::check_if_integer(json, max_len)) {
+      if (check_trailing && !_json_iter->is_single_token()) { return TRAILING_CONTENT; }
+      logger::log_error(*_json_iter, start_position(), depth(), "Found big integer");
+      return number_type::big_integer;
+    }
+    logger::log_error(*_json_iter, start_position(), depth(), "Root number more than 1082 characters and not a big integer");
     return NUMBER_ERROR;
   }
   auto answer = numberparsing::get_number_type(tmpbuf);
@@ -623,15 +628,21 @@ simdjson_inline simdjson_result<SIMDJSON_IMPLEMENTATION::number_type> value_iter
   return answer;
 }
 simdjson_inline simdjson_result<number> value_iterator::get_root_number(bool check_trailing) noexcept {
-  auto max_len = peek_start_length();
+  auto max_len = peek_root_length();
   auto json = peek_root_scalar("number");
   // Per https://www.exploringbinary.com/maximum-number-of-decimal-digits-in-binary-floating-point-numbers/,
   // 1074 is the maximum number of significant fractional digits. Add 8 more digits for the biggest
   // number: -0.<fraction>e-308.
+  // NOTE: the current approach doesn't work for very big integer numbers containing more than 1074 digits.
   uint8_t tmpbuf[1074+8+1+1];
   tmpbuf[1074+8+1] = '\0'; // make sure that buffer is always null terminated.
   if (!_json_iter->copy_to_buffer(json, max_len, tmpbuf, 1074+8+1)) {
-    logger::log_error(*_json_iter, start_position(), depth(), "Root number more than 1082 characters");
+    if(numberparsing::check_if_integer(json, max_len)) {
+      if (check_trailing && !_json_iter->is_single_token()) { return TRAILING_CONTENT; }
+      logger::log_error(*_json_iter, start_position(), depth(), "Found big integer");
+      return BIGINT_ERROR;
+    }
+    logger::log_error(*_json_iter, start_position(), depth(), "Root number more than 1082 characters and not a big integer");
     return NUMBER_ERROR;
   }
   number num;
@@ -663,7 +674,7 @@ simdjson_warn_unused simdjson_inline simdjson_result<raw_json_string> value_iter
   return raw_json_string(json+1);
 }
 simdjson_warn_unused simdjson_inline simdjson_result<uint64_t> value_iterator::get_root_uint64(bool check_trailing) noexcept {
-  auto max_len = peek_start_length();
+  auto max_len = peek_root_length();
   auto json = peek_root_scalar("uint64");
   uint8_t tmpbuf[20+1+1]{}; // <20 digits> is the longest possible unsigned integer
   tmpbuf[20+1] = '\0'; // make sure that buffer is always null terminated.
@@ -679,7 +690,7 @@ simdjson_warn_unused simdjson_inline simdjson_result<uint64_t> value_iterator::g
   return result;
 }
 simdjson_warn_unused simdjson_inline simdjson_result<uint64_t> value_iterator::get_root_uint64_in_string(bool check_trailing) noexcept {
-  auto max_len = peek_start_length();
+  auto max_len = peek_root_length();
   auto json = peek_root_scalar("uint64");
   uint8_t tmpbuf[20+1+1]{}; // <20 digits> is the longest possible unsigned integer
   tmpbuf[20+1] = '\0'; // make sure that buffer is always null terminated.
@@ -695,7 +706,7 @@ simdjson_warn_unused simdjson_inline simdjson_result<uint64_t> value_iterator::g
   return result;
 }
 simdjson_warn_unused simdjson_inline simdjson_result<int64_t> value_iterator::get_root_int64(bool check_trailing) noexcept {
-  auto max_len = peek_start_length();
+  auto max_len = peek_root_length();
   auto json = peek_root_scalar("int64");
   uint8_t tmpbuf[20+1+1]; // -<19 digits> is the longest possible integer
   tmpbuf[20+1] = '\0'; // make sure that buffer is always null terminated.
@@ -712,7 +723,7 @@ simdjson_warn_unused simdjson_inline simdjson_result<int64_t> value_iterator::ge
   return result;
 }
 simdjson_warn_unused simdjson_inline simdjson_result<int64_t> value_iterator::get_root_int64_in_string(bool check_trailing) noexcept {
-  auto max_len = peek_start_length();
+  auto max_len = peek_root_length();
   auto json = peek_root_scalar("int64");
   uint8_t tmpbuf[20+1+1]; // -<19 digits> is the longest possible integer
   tmpbuf[20+1] = '\0'; // make sure that buffer is always null terminated.
@@ -729,7 +740,7 @@ simdjson_warn_unused simdjson_inline simdjson_result<int64_t> value_iterator::ge
   return result;
 }
 simdjson_warn_unused simdjson_inline simdjson_result<double> value_iterator::get_root_double(bool check_trailing) noexcept {
-  auto max_len = peek_start_length();
+  auto max_len = peek_root_length();
   auto json = peek_root_scalar("double");
   // Per https://www.exploringbinary.com/maximum-number-of-decimal-digits-in-binary-floating-point-numbers/,
   // 1074 is the maximum number of significant fractional digits. Add 8 more digits for the biggest
@@ -749,7 +760,7 @@ simdjson_warn_unused simdjson_inline simdjson_result<double> value_iterator::get
 }
 
 simdjson_warn_unused simdjson_inline simdjson_result<double> value_iterator::get_root_double_in_string(bool check_trailing) noexcept {
-  auto max_len = peek_start_length();
+  auto max_len = peek_root_length();
   auto json = peek_root_scalar("double");
   // Per https://www.exploringbinary.com/maximum-number-of-decimal-digits-in-binary-floating-point-numbers/,
   // 1074 is the maximum number of significant fractional digits. Add 8 more digits for the biggest
@@ -768,7 +779,7 @@ simdjson_warn_unused simdjson_inline simdjson_result<double> value_iterator::get
   return result;
 }
 simdjson_warn_unused simdjson_inline simdjson_result<bool> value_iterator::get_root_bool(bool check_trailing) noexcept {
-  auto max_len = peek_start_length();
+  auto max_len = peek_root_length();
   auto json = peek_root_scalar("bool");
   uint8_t tmpbuf[5+1+1]; // +1 for null termination
   tmpbuf[5+1] = '\0'; // make sure that buffer is always null terminated.
@@ -781,7 +792,7 @@ simdjson_warn_unused simdjson_inline simdjson_result<bool> value_iterator::get_r
   return result;
 }
 simdjson_inline simdjson_result<bool> value_iterator::is_root_null(bool check_trailing) noexcept {
-  auto max_len = peek_start_length();
+  auto max_len = peek_root_length();
   auto json = peek_root_scalar("null");
   bool result = (max_len >= 4 && !atomparsing::str4ncmp(json, "null") &&
          (max_len == 4 || jsoncharutils::is_structural_or_whitespace(json[4])));
@@ -853,6 +864,9 @@ simdjson_inline const uint8_t *value_iterator::peek_start() const noexcept {
 simdjson_inline uint32_t value_iterator::peek_start_length() const noexcept {
   return _json_iter->peek_length(start_position());
 }
+simdjson_inline uint32_t value_iterator::peek_root_length() const noexcept {
+  return _json_iter->peek_root_length(start_position());
+}
 
 simdjson_inline const uint8_t *value_iterator::peek_scalar(const char *type) noexcept {
   logger::log_value(*_json_iter, start_position(), depth(), type);