Merge pull request #200 from de-ep/gitignore-CMKR_BUILD_DIR

Automatically create .gitignore in CMAKE_BINARY_DIR

.clang-format

@@ -10,9 +10,10 @@ AlignTrailingComments: true
 AllowAllParametersOfDeclarationOnNextLine: true
 AllowShortBlocksOnASingleLine: false
 AllowShortCaseLabelsOnASingleLine: false
-AllowShortFunctionsOnASingleLine: true
+AllowShortFunctionsOnASingleLine: false
 AllowShortIfStatementsOnASingleLine: false
 AllowShortLoopsOnASingleLine: false
+AllowShortLambdasOnASingleLine: None
 AlwaysBreakAfterDefinitionReturnType: None
 AlwaysBreakAfterReturnType: None
 AlwaysBreakBeforeMultilineStrings: false
@@ -72,7 +73,7 @@ PenaltyExcessCharacter: 1000000
 PenaltyReturnTypeOnItsOwnLine: 60
 PointerAlignment: Right
 ReflowComments:  true
-SortIncludes:    true
+SortIncludes:    false
 SortUsingDeclarations: true
 SpaceAfterCStyleCast: false
 SpaceAfterTemplateKeyword: true

.editorconfig

@@ -0,0 +1,24 @@
+root = true
+
+[*]
+end_of_line = lf
+trim_trailing_whitespace = true
+charset = utf-8
+
+[*.{c,h,cpp,hpp,toml}]
+indent_style = space
+insert_final_newline = true
+
+[{CMakeLists.txt, *.cmake}]
+indent_style = tab
+tab_width = 8
+insert_final_newline = true
+
+# Exclude the third_party folder
+[/third_party/**]
+charset = unset
+end_of_line = unset
+insert_final_newline = unset
+trim_trailing_whitespace = unset
+indent_style = unset
+indent_size = unset

.github/workflows/build.yml

@@ -1,21 +1,25 @@
-name: CMake
+name: build
 
 on: [push, pull_request]
 
 jobs:
-  build:
+  cmake:
     # Skip building pull requests from the same repository
     if: ${{ github.event_name == 'push' || (github.event_name == 'pull_request' && github.event.pull_request.head.repo.full_name != github.repository) }}
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
       matrix:
-        os: [windows-2019, macos-10.15, ubuntu-20.04]
+        os: [windows-2022, macos-latest, ubuntu-22.04]
     env:
-      BUILD_TYPE: Release
+      BUILD_TYPE: 'Release'
+      CMAKE_GENERATOR: 'Ninja'
     steps:
     - name: Checkout
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
+
+    - name: Visual Studio Development Environment
+      uses: ilammy/msvc-dev-cmd@0b201ec74fa43914dc39ae48a89fd1d8cb592756 # v1.13.1
 
     - name: Tag cmkr.cmake
       if: ${{ startsWith(github.ref, 'refs/tags/') }}
@@ -38,28 +42,31 @@ jobs:
         ctest -C ${{ env.BUILD_TYPE }} --verbose
 
     - name: Upload artifacts
-      uses: actions/upload-artifact@v2
+      uses: actions/upload-artifact@v4
       with:
         name: ${{ github.event.repository.name }}-${{ matrix.os }}
         path: install/bin/*
 
     - name: Get lowercase OS name
       id: osname
-      uses: ASzc/change-string-case-action@v1
+      uses: ASzc/change-string-case-action@ccb130a4e483d3e86287289183704dc9bf53e77e # master 2024-04-05
+      if: ${{ startsWith(github.ref, 'refs/tags/') }}
       with:
         string: ${{ runner.os }}
 
     - name: Compress artifacts
-      uses: vimtor/action-zip@v1
+      uses: vimtor/action-zip@1379ea20d4c5705669ba81fd626dd01b1c738f26 # v1.2
+      if: ${{ startsWith(github.ref, 'refs/tags/') }}
       with:
         files: install/bin/
         dest: ${{ github.event.repository.name }}-${{ steps.osname.outputs.lowercase }}.zip
 
     - name: Release
-      uses: softprops/action-gh-release@v1
+      uses: softprops/action-gh-release@da05d552573ad5aba039eaac05058a918a7bf631 # v2.2.2
       if: ${{ startsWith(github.ref, 'refs/tags/') }}
       with:
         prerelease: ${{ !startsWith(github.ref, 'refs/tags/v') || contains(github.ref, '-pre') }}
         files: ${{ github.event.repository.name }}-${{ steps.osname.outputs.lowercase }}.zip
+        generate_release_notes: true
       env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/lint.yml

@@ -0,0 +1,41 @@
+name: lint
+
+on: [push, pull_request]
+
+jobs:
+  clang-format:
+    # Skip building pull requests from the same repository
+    if: ${{ github.event_name == 'push' || (github.event_name == 'pull_request' && github.event.pull_request.head.repo.full_name != github.repository) }}
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: clang-format
+        id: clang-format
+        uses: DoozyX/clang-format-lint-action@c71d0bf4e21876ebec3e5647491186f8797fde31 # v0.18.2
+        with:
+          exclude: './third_party'
+          extensions: 'c,h,cpp,hpp'
+          clangFormatVersion: 15
+          style: file
+
+      - name: clang-format instructions
+        if: ${{ failure() && steps.clang-format.outcome == 'failure' }}
+        run: |
+          # Instructions for fixing the formatting errors
+          echo -e "\n\033[0;31mTo fix the formatting, run:\nclang-format -style=file -i \$(git ls-files \"*.c\" \"*.h\" \"*.cpp\" \"*.hpp\")\033[0m\n"
+          exit 1
+
+  editorconfig:
+    # Skip building pull requests from the same repository
+    if: ${{ github.event_name == 'push' || (github.event_name == 'pull_request' && github.event.pull_request.head.repo.full_name != github.repository) }}
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Run editorconfig-checker
+        uses: editorconfig-checker/action-editorconfig-checker@27dd658c2b1282c7f1f4dc242cdf0f6d8af728ab # master 2025-05-30

.gitignore

@@ -9,3 +9,5 @@ build*/
 .idea/
 cmake-build*/
 CMakeLists.txt.user
+.vscode/
+.DS_Store

CMakeLists.txt

@@ -1,23 +1,20 @@
 # This file is automatically generated from cmake.toml - DO NOT EDIT
 # See https://github.com/build-cpp/cmkr for more information
 
-cmake_minimum_required(VERSION 2.8...3.8)
+cmake_minimum_required(VERSION 2.8...3.31)
 
 if(CMAKE_SOURCE_DIR STREQUAL CMAKE_BINARY_DIR)
 	message(FATAL_ERROR "In-tree builds are not supported. Run CMake from a separate directory: cmake -B build")
 endif()
 
-# Regenerate CMakeLists.txt automatically in the root project
 set(CMKR_ROOT_PROJECT OFF)
 if(CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_SOURCE_DIR)
 	set(CMKR_ROOT_PROJECT ON)
 
 	# Enable folder support
 	set_property(GLOBAL PROPERTY USE_FOLDERS ON)
-endif()
 
-# Create a configure-time dependency on cmake.toml to improve IDE support
+	# Create a configure-time dependency on cmake.toml to improve IDE support
-if(CMKR_ROOT_PROJECT)
 	configure_file(cmake.toml cmake.toml COPYONLY)
 endif()
 
@@ -25,7 +22,7 @@ project(cmkr
 	LANGUAGES
 		CXX
 	VERSION
-		0.2.12
+		0.2.46
 	DESCRIPTION
 		"CMakeLists generator from TOML"
 )
@@ -33,7 +30,7 @@ project(cmkr
 include("cmake/generate_documentation.cmake")
 include("cmake/generate_resources.cmake")
 
-# third_party
+# Subdirectory: third_party
 set(CMKR_CMAKE_FOLDER ${CMAKE_FOLDER})
 if(CMAKE_FOLDER)
 	set(CMAKE_FOLDER "${CMAKE_FOLDER}/third_party")
@@ -43,7 +40,7 @@ endif()
 add_subdirectory(third_party)
 set(CMAKE_FOLDER ${CMKR_CMAKE_FOLDER})
 
-# tests
+# Subdirectory: tests
 set(CMKR_CMAKE_FOLDER ${CMAKE_FOLDER})
 if(CMAKE_FOLDER)
 	set(CMAKE_FOLDER "${CMAKE_FOLDER}/tests")
@@ -53,64 +50,35 @@ endif()
 add_subdirectory(tests)
 set(CMAKE_FOLDER ${CMKR_CMAKE_FOLDER})
 
-
+# Target: cmkr_generate_documentation
-
-# Target cmkr_generate_documentation
-set(CMKR_TARGET cmkr_generate_documentation)
-set(cmkr_generate_documentation_SOURCES "")
-
-set(CMKR_SOURCES ${cmkr_generate_documentation_SOURCES})
 add_library(cmkr_generate_documentation INTERFACE)
 
-if(cmkr_generate_documentation_SOURCES)
+set(CMKR_TARGET cmkr_generate_documentation)
-	target_sources(cmkr_generate_documentation INTERFACE ${cmkr_generate_documentation_SOURCES})
-endif()
-
 generate_documentation()
 
-unset(CMKR_TARGET)
+# Target: cmkr
-unset(CMKR_SOURCES)
+set(cmkr_SOURCES
-
+	cmake.toml
-# Target cmkr
+	"cmake/cmkr.cmake"
-set(CMKR_TARGET cmkr)
+	"cmake/version.hpp.in"
-set(cmkr_SOURCES "")
-
-list(APPEND cmkr_SOURCES
-	"src/arguments.cpp"
-	"src/build.cpp"
-	"src/cmake_generator.cpp"
-	"src/error.cpp"
-	"src/help.cpp"
-	"src/main.cpp"
-	"src/project_parser.cpp"
 	"include/arguments.hpp"
 	"include/build.hpp"
 	"include/cmake_generator.hpp"
-	"include/error.hpp"
 	"include/fs.hpp"
 	"include/help.hpp"
 	"include/literals.hpp"
 	"include/project_parser.hpp"
-	"cmake/cmkr.cmake"
+	"src/arguments.cpp"
-	"cmake/version.hpp.in"
+	"src/build.cpp"
+	"src/cmake_generator.cpp"
+	"src/help.cpp"
+	"src/main.cpp"
+	"src/project_parser.cpp"
 )
 
-list(APPEND cmkr_SOURCES
-	cmake.toml
-)
-
-set(CMKR_SOURCES ${cmkr_SOURCES})
 add_executable(cmkr)
 
-if(cmkr_SOURCES)
+target_sources(cmkr PRIVATE ${cmkr_SOURCES})
-	target_sources(cmkr PRIVATE ${cmkr_SOURCES})
-endif()
-
-get_directory_property(CMKR_VS_STARTUP_PROJECT DIRECTORY ${PROJECT_SOURCE_DIR} DEFINITION VS_STARTUP_PROJECT)
-if(NOT CMKR_VS_STARTUP_PROJECT)
-	set_property(DIRECTORY ${PROJECT_SOURCE_DIR} PROPERTY VS_STARTUP_PROJECT cmkr)
-endif()
-
 source_group(TREE ${CMAKE_CURRENT_SOURCE_DIR} FILES ${cmkr_SOURCES})
 
 target_compile_features(cmkr PRIVATE
@@ -126,13 +94,15 @@ target_link_libraries(cmkr PRIVATE
 	ghc_filesystem
 	mpark_variant
 	ordered_map
-	nlohmann_json
 )
 
-generate_resources(${CMKR_TARGET})
+get_directory_property(CMKR_VS_STARTUP_PROJECT DIRECTORY ${PROJECT_SOURCE_DIR} DEFINITION VS_STARTUP_PROJECT)
+if(NOT CMKR_VS_STARTUP_PROJECT)
+	set_property(DIRECTORY ${PROJECT_SOURCE_DIR} PROPERTY VS_STARTUP_PROJECT cmkr)
+endif()
 
-unset(CMKR_TARGET)
+set(CMKR_TARGET cmkr)
-unset(CMKR_SOURCES)
+include("cmake/custom_targets.cmake")
 
 install(
 	TARGETS

README.md

@@ -1,5 +1,7 @@
 # cmkr
 
+[![Ask DeepWiki](https://deepwiki.com/badge.svg)](https://deepwiki.com/build-cpp/cmkr)
+
 `cmkr`, pronounced "cmaker", is a modern build system based on [CMake](https://cmake.org/) and [TOML](https://toml.io).
 
 `cmkr` parses `cmake.toml` files and generates a modern, idiomatic `CMakeLists.txt` for you. A minimal example:
@@ -13,27 +15,29 @@ type = "executable"
 sources = ["src/main.cpp"]
 ```
 
-`cmkr` can bootstrap itself from CMake and you only need CMake to use it.
+`cmkr` can bootstrap itself and you only need CMake and a C++ compiler to use it.
 
 ## Getting started
 
-To get started run the following commands from your project directory:
+To get started, run the following commands from your project directory:
 
 ```sh
 curl https://raw.githubusercontent.com/build-cpp/cmkr/main/cmake/cmkr.cmake -o cmkr.cmake
 cmake -P cmkr.cmake
 ```
 
-After the bootstrapping process finishes, modify [`cmake.toml`](https://build-cpp.github.io/cmkr/cmake-toml) and open the project in your favorite IDE or build with CMake:
+After the bootstrapping process finishes, customize [`cmake.toml`](https://build-cpp.github.io/cmkr/cmake-toml) for your project and run CMake:
 
 ```sh
 cmake -B build
 cmake --build build
 ```
 
-Once bootstrapped, `cmkr` does not introduce extra steps to your workflow. After modifying `cmake.toml` you simply build/configure your CMake project and `cmkr` will automatically regenerate `CMakeLists.txt`.
+Once bootstrapped, `cmkr` does not introduce extra steps to your workflow. After modifying `cmake.toml` you simply build/configure your CMake project and `cmkr` will automatically regenerate `CMakeLists.txt` when necessary.
 
-In CI settings the `cmkr` bootstrapping process is skipped so there is no extra configure-time overhead in your pipelines.
+<sub>**Note**: The `cmake.toml` project file, generated `CMakeLists.txt` and `cmkr.cmake` bootstrapping script are all intended to be added to source control.</sub>
+
+In CI environments the `cmkr` bootstrapping process is skipped, so there is no additional overhead in your pipelines.
 
 ## Template repositories
 
@@ -53,10 +57,10 @@ Optionally you can put a [`cmkr` release](https://github.com/build-cpp/cmkr/rele
 ```
 Usage: cmkr [arguments]
 arguments:
-    init    [executable|library|shared|static|interface] Starts a new project in the same directory.
+    init    [executable|library|shared|static|interface] Create a project.
     gen                                                  Generates CMakeLists.txt file.
     build   <extra cmake args>                           Run cmake and build.
-    install                                              Run cmake --install. Needs admin privileges.
+    install                                              Run cmake --install.
     clean                                                Clean the build directory.
     help                                                 Show help.
     version                                              Current cmkr version.
@@ -64,9 +68,10 @@ arguments:
 
 ## Credits
 
-- https://github.com/gulrak/filesystem
+- [gulrak/filesystem](https://github.com/gulrak/filesystem)
-- https://github.com/Tessil/ordered-map
+- [Tessil/ordered-map](https://github.com/Tessil/ordered-map)
-- https://github.com/ToruNiina/toml11
+- [ToruNiina/toml11](https://github.com/ToruNiina/toml11)
-- https://github.com/mpark/variant
+- [mpark/variant](https://github.com/mpark/variant)
-- https://www.svgrepo.com/svg/192268/hammer
+- [SVG Repo Hammer](https://www.svgrepo.com/svg/192268/hammer)
-- https://github.com/can1357 for buying `cmkr.build` ❤️
+- [can1357](https://github.com/can1357) for buying `cmkr.build` ❤️
+- [JustasMasiulis](https://github.com/JustasMasiulis) for fixing the dark theme ❤️

cmake.toml

@@ -1,17 +1,17 @@
 [cmake]
-version = "2.8...3.8"
+version = "2.8...3.31"
 cmkr-include = false
 
 [project]
 name = "cmkr"
-version = "0.2.12"
+version = "0.2.46"
 description = "CMakeLists generator from TOML"
 languages = ["CXX"]
-subdirs = ["third_party", "tests"]
 include-after = [
     "cmake/generate_documentation.cmake",
     "cmake/generate_resources.cmake"
 ]
+subdirs = ["third_party", "tests"]
 
 [target.cmkr_generate_documentation]
 type = "interface"
@@ -36,11 +36,8 @@ link-libraries = [
     "ghc_filesystem",
     "mpark_variant",
     "ordered_map",
-    "nlohmann_json",
 ]
-cmake-after = """
+include-after = ["cmake/custom_targets.cmake"]
-generate_resources(${CMKR_TARGET})
-"""
 
 [[install]]
 targets = ["cmkr"]

cmake/cmkr.cmake

@@ -2,7 +2,7 @@ include_guard()
 
 # Change these defaults to point to your infrastructure if desired
 set(CMKR_REPO "https://github.com/build-cpp/cmkr" CACHE STRING "cmkr git repository" FORCE)
-set(CMKR_TAG "v0.2.12" CACHE STRING "cmkr git tag (this needs to be available forever)" FORCE)
+set(CMKR_TAG "v0.2.46" CACHE STRING "cmkr git tag (this needs to be available forever)" FORCE)
 set(CMKR_COMMIT_HASH "" CACHE STRING "cmkr git commit hash (optional)" FORCE)
 
 # To bootstrap/generate a cmkr project: cmake -P cmkr.cmake
@@ -10,6 +10,7 @@ if(CMAKE_SCRIPT_MODE_FILE)
     set(CMAKE_BINARY_DIR "${CMAKE_BINARY_DIR}/build")
     set(CMAKE_CURRENT_BINARY_DIR "${CMAKE_BINARY_DIR}")
     file(MAKE_DIRECTORY "${CMAKE_BINARY_DIR}")
+    file(WRITE "${CMAKE_BINARY_DIR}/.gitignore" "# This file is autogenerated by cmkr.\n*\n")
 endif()
 
 # Set these from the command line to customize for development/debugging purposes
@@ -58,9 +59,16 @@ else()
 endif()
 
 # Use cached cmkr if found
-if(DEFINED ENV{CMKR_CACHE} AND EXISTS "$ENV{CMKR_CACHE}")
+if(DEFINED ENV{CMKR_CACHE})
     set(CMKR_DIRECTORY_PREFIX "$ENV{CMKR_CACHE}")
     string(REPLACE "\\" "/" CMKR_DIRECTORY_PREFIX "${CMKR_DIRECTORY_PREFIX}")
+    if(CMKR_DIRECTORY_PREFIX MATCHES "^~")
+        if(WIN32)
+            string(REGEX REPLACE "^~" "$ENV{USERPROFILE}" CMKR_DIRECTORY_PREFIX "${CMKR_DIRECTORY_PREFIX}")
+        elseif(UNIX) 
+            string(REGEX REPLACE "^~" "$ENV{HOME}" CMKR_DIRECTORY_PREFIX "${CMKR_DIRECTORY_PREFIX}")
+        endif()
+    endif()
     if(NOT CMKR_DIRECTORY_PREFIX MATCHES "\\/$")
         set(CMKR_DIRECTORY_PREFIX "${CMKR_DIRECTORY_PREFIX}/")
     endif()
@@ -72,10 +80,27 @@ endif()
 set(CMKR_DIRECTORY "${CMKR_DIRECTORY_PREFIX}${CMKR_TAG}")
 set(CMKR_CACHED_EXECUTABLE "${CMKR_DIRECTORY}/bin/${CMKR_EXECUTABLE_NAME}")
 
+# Helper function to check if a string starts with a prefix
+# Cannot use MATCHES, see: https://github.com/build-cpp/cmkr/issues/61
+function(cmkr_startswith str prefix result)
+    string(LENGTH "${prefix}" prefix_length)
+    string(LENGTH "${str}" str_length)
+    if(prefix_length LESS_EQUAL str_length)
+        string(SUBSTRING "${str}" 0 ${prefix_length} str_prefix)
+        if(prefix STREQUAL str_prefix)
+            set("${result}" ON PARENT_SCOPE)
+            return()
+        endif()
+    endif()
+    set("${result}" OFF PARENT_SCOPE)
+endfunction()
+
 # Handle upgrading logic
 if(CMKR_EXECUTABLE AND NOT CMKR_CACHED_EXECUTABLE STREQUAL CMKR_EXECUTABLE)
-    if(CMKR_EXECUTABLE MATCHES "^${CMAKE_CURRENT_BINARY_DIR}/_cmkr")
+    cmkr_startswith("${CMKR_EXECUTABLE}" "${CMAKE_CURRENT_BINARY_DIR}/_cmkr" CMKR_STARTSWITH_BUILD)
-        if(DEFINED ENV{CMKR_CACHE} AND EXISTS "$ENV{CMKR_CACHE}")
+    cmkr_startswith("${CMKR_EXECUTABLE}" "${CMKR_DIRECTORY_PREFIX}" CMKR_STARTSWITH_CACHE)
+    if(CMKR_STARTSWITH_BUILD)
+        if(DEFINED ENV{CMKR_CACHE})
             message(AUTHOR_WARNING "[cmkr] Switching to cached cmkr: '${CMKR_CACHED_EXECUTABLE}'")
             if(EXISTS "${CMKR_CACHED_EXECUTABLE}")
                 set(CMKR_EXECUTABLE "${CMKR_CACHED_EXECUTABLE}" CACHE FILEPATH "Full path to cmkr executable" FORCE)
@@ -86,7 +111,7 @@ if(CMKR_EXECUTABLE AND NOT CMKR_CACHED_EXECUTABLE STREQUAL CMKR_EXECUTABLE)
             message(AUTHOR_WARNING "[cmkr] Upgrading '${CMKR_EXECUTABLE}' to '${CMKR_CACHED_EXECUTABLE}'")
             unset(CMKR_EXECUTABLE CACHE)
         endif()
-    elseif(DEFINED ENV{CMKR_CACHE} AND EXISTS "$ENV{CMKR_CACHE}" AND CMKR_EXECUTABLE MATCHES "^${CMKR_DIRECTORY_PREFIX}")
+    elseif(DEFINED ENV{CMKR_CACHE} AND CMKR_STARTSWITH_CACHE)
         message(AUTHOR_WARNING "[cmkr] Upgrading cached '${CMKR_EXECUTABLE}' to '${CMKR_CACHED_EXECUTABLE}'")
         unset(CMKR_EXECUTABLE CACHE)
     endif()

cmake/custom_targets.cmake

@@ -0,0 +1,18 @@
+generate_resources(cmkr)
+
+add_custom_target(regenerate-cmake
+        COMMAND "$<TARGET_FILE:cmkr>" gen
+        WORKING_DIRECTORY "${PROJECT_SOURCE_DIR}"
+)
+
+if(CMAKE_CONFIGURATION_TYPES)
+    add_custom_target(run-tests
+            COMMAND "${CMAKE_CTEST_COMMAND}" -C $<CONFIG>
+            WORKING_DIRECTORY "${PROJECT_BINARY_DIR}/tests"
+    )
+else()
+    add_custom_target(run-tests
+            COMMAND "${CMAKE_CTEST_COMMAND}"
+            WORKING_DIRECTORY "${PROJECT_BINARY_DIR}/tests"
+    )
+endif()

cmake/generate_documentation.cmake

@@ -1,21 +1,21 @@
 option(CMKR_GENERATE_DOCUMENTATION "Generate cmkr documentation" ${CMKR_ROOT_PROJECT})
-set(CMKR_TESTS "" CACHE INTERNAL "List of test directories in the order declared in tests/cmake.toml")
-
-if(CMKR_GENERATE_DOCUMENTATION)
-    # Hook the add_test function to capture the tests in the order declared in tests/cmake.toml
-    function(add_test)
-        cmake_parse_arguments(TEST "" "WORKING_DIRECTORY" "" ${ARGN})
-        get_filename_component(TEST_WORKING_DIRECTORY "${TEST_WORKING_DIRECTORY}" NAME)
-        list(APPEND CMKR_TESTS "${TEST_WORKING_DIRECTORY}")
-        set(CMKR_TESTS "${CMKR_TESTS}" CACHE INTERNAL "")
-        _add_test(${test} ${ARGN})
-    endfunction()
-endif()
 
 function(generate_documentation)
     if(CMKR_GENERATE_DOCUMENTATION)
         message(STATUS "[cmkr] Generating documentation...")
 
+        # Extract the order of the tests
+        set(CMKR_TESTS "")
+        file(READ "${PROJECT_SOURCE_DIR}/tests/cmake.toml" tests_toml NO_HEX_CONVERSION)
+        string(REGEX MATCHALL "working-directory = \"([^\"]+)\"" tests_match "${tests_toml}")
+        foreach(match ${tests_match})
+            if(match MATCHES "working-directory = \"([^\"]+)\"")
+                list(APPEND CMKR_TESTS "${CMAKE_MATCH_1}")
+            else()
+                message(FATAL_ERROR "This should not happen (wrong regex?)")
+            endif()
+        endforeach()
+
         # Delete previously generated examples
         set(example_folder "${PROJECT_SOURCE_DIR}/docs/examples")
         file(GLOB example_files "${example_folder}/*.md")

docs/_config.yml

@@ -21,4 +21,22 @@ gh_edit_branch: "main"
 gh_edit_view_mode: "edit"
 gh_edit_source: docs
 
+ga_tracking: G-DY172KY7Z9
+
 production_url : https://cmkr.build
+footer_content: |
+  <script src="https://giscus.app/client.js"
+          data-repo="build-cpp/cmkr"
+          data-repo-id="MDEwOlJlcG9zaXRvcnkyOTQwMDc3MzY="
+          data-category="Documentation"
+          data-category-id="DIC_kwDOEYYzuM4CTXeA"
+          data-mapping="pathname"
+          data-strict="1"
+          data-reactions-enabled="1"
+          data-emit-metadata="0"
+          data-input-position="top"
+          data-theme="preferred_color_scheme"
+          data-lang="en"
+          crossorigin="anonymous"
+          async>
+  </script>

docs/basics.md

@@ -0,0 +1,143 @@
+---
+layout: page
+title: Basics
+nav_order: 1
+---
+
+# Basics
+
+To effectively use cmkr it helps to understand the basic concepts of CMake. This page serves as an introduction to CMake for beginners. Links to the CMake documentation are included for reference.
+
+## Projects
+
+A CMake **project** is a collection of targets. In the context of libraries the project usually corresponds to the **package** that other projects can depend on.
+
+<sub>Visual Studio: a CMake **project** corresponds to a _solution_.</sub>
+
+## Targets
+
+The basic unit of CMake is called a **target**. A target (also referred to as [binary target](https://cmake.org/cmake/help/latest/manual/cmake-buildsystem.7.html#binary-targets) in the CMake documentation) corresponds to an executable or static/dynamic library you can build.
+
+<sub>Visual Studio: a **target** corresponds to a _project_.</sub>
+
+Most important target types:
+
+|Type|Purpose|
+|-|-|
+|Executable|Program you run on your computer (`.exe`)|
+|Static library|Library code _compiled into_ the final executable (`.lib`, `.a`)|
+|Dynamic library|Library code loaded at runtime (`.dll`, `.so`, `.dylib`)|
+|Interface|Used for organizational purposes (common flags/includes/libraries)|
+
+There are also other [pseudo targets](https://cmake.org/cmake/help/latest/manual/cmake-buildsystem.7.html#pseudo-targets), but they are not important for now.
+
+## Target Properties
+
+Targets have a collection of **properties** that describe how the compiler builds them.
+
+The most commonly-used properties:
+
+- [_Sources_](https://cmake.org/cmake/help/latest/command/target_sources.html): the `*.cpp` files used to build the target.
+- [_Include directories_](https://cmake.org/cmake/help/latest/command/target_include_directories.html): Paths to directories the compiler will search when doing `#include`.
+- [_Compile definitions_](https://cmake.org/cmake/help/latest/command/target_compile_definitions.html): Preprocessor macro definitions used for compilation (`-DMYOPTION`).
+- [_Compile options_](https://cmake.org/cmake/help/latest/command/target_compile_options.html): Command line flags for the compiler (platform/compiler specific).
+- [_Compile features_](https://cmake.org/cmake/help/latest/command/target_compile_features.html): C/C++ standard version to build with.
+- [_Link libraries_](https://cmake.org/cmake/help/latest/command/target_link_libraries.html): The **dependencies** required to build this target.
+- [_Link options_](https://cmake.org/cmake/help/latest/command/target_link_options.html): Command line flags for the linker (platform/linker specific).
+
+<sub>See the [CMake documentation](https://cmake.org/cmake/help/latest/manual/cmake-properties.7.html#properties-on-targets) for an exhaustive list of target properties.</sub>
+
+**Important**: The term **link** has a slightly different meaning in CMake than you might expect. In addition to adding a library to the command line, CMake also (transitively) propagates properties of the target you link to based on their _visibility_.
+
+You should think of **linking** in CMake as _depending on_.
+{:.info}
+
+The propagation of properties depends on their **visibility**:
+
+- **Private**: properties that are only used when building the target itself.
+- **Interface**: properties that are used when depending on this target.
+- **Public**: combination of private and interface.
+
+In practice you default to **private**, unless consumers of your library _require_ the property to build their target. In that case you use **public**.
+
+## Example
+
+The most intuitive example is with _include directories_. Imagine there are two targets:
+
+1. `StringUtils`: A library with string utilities.
+   - _Sources_: `StringUtils/src/stringutils.cpp`
+   - _Include directories_: `StringUtils/include`
+2. `DataProcessor`: An executable that uses functionality from `StringUtils` to process some data.
+   - _Sources_: `DataProcessor/src/main.cpp`
+   - _Link libraries_: `StringUtils`
+
+The _include directories_ property of `StringUtils` has to be **public**. If it was **private**, the `DataProcessor` target would fail to `#include <stringutils.hpp>` since the _include directories_ property is not propagated.
+
+The `cmake.toml` for this example would look something like this:
+
+```toml
+[project]
+name = "DataProcessor"
+
+[target.StringUtils]
+type = "static"
+sources = ["StringUtils/src/stringutils.cpp"]
+headers = ["StringUtils/include/stringutils.hpp"]
+include-directories = ["StringUtils/include"] # public (default for libraries)
+
+[target.DataProcessor]
+type = "executable"
+sources = ["DataProcessor/src/main.cpp"]
+link-libraries = ["StringUtils"] # private (default for executables)
+```
+
+The generated `CMakeLists.txt` (simplified) looks like this:
+
+```cmake
+project(DataProcessor)
+
+# Target: StringUtils
+add_library(StringUtils STATIC
+    "StringUtils/include/stringutils.hpp"
+    "StringUtils/src/stringutils.cpp"
+)
+target_include_directories(StringUtils PUBLIC
+	"StringUtils/include"
+)
+
+# Target: DataProcessor
+add_executable(DataProcessor
+    "DataProcessor/src/main.cpp"
+)
+target_link_libraries(DataProcessor PRIVATE
+    StringUtils
+)
+```
+
+## CMake Phases
+
+CMake works in three phases:
+1. **Configure**: Execute `CMakeLists.txt` (find dependencies, create targets, OS/compiler-specific conditions, etc).
+2. **Generate**: Generate build files (propagates target properties and handles [_generator expressions_](https://cmake.org/cmake/help/latest/manual/cmake-generator-expressions.7.html)).
+3. **Build**: Execute the compiler to produce executables/libraries.
+
+CMake keeps generated files separate from your source in a **build directory**. You specify a [**generator**](https://cmake.org/cmake/help/latest/manual/cmake-generators.7.html) (Visual Studio/Ninja) and [**build type**](https://cmake.org/cmake/help/latest/manual/cmake-buildsystem.7.html#build-configurations) (Debug/Release) during configuration.
+
+```bash
+# Configure project and generate build files in build directory
+cmake -B build -DCMAKE_BUILD_TYPE=Release
+
+# Build the project
+cmake --build build --config Release
+```
+
+We specify both `CMAKE_BUILD_TYPE` and `--config` to be compatible with generators that support multiple configurations at once ((like Visual Studio/Xcode/Ninja Multi-Config).
+{:.info}
+
+**Build Types**:
+- `Debug`: No optimization, debug symbols
+- `Release`: Full optimization, no debug symbols
+- `RelWithDebInfo`: Medium optimizations, debug symbols
+- `MinSizeRel`: Optimize for size, no debug symbols
+
+**Generators**: CMake auto-detects (Makefiles on Linux/macOS, Visual Studio on Windows), but you can specify explicitly with `-G` during the _configure_ step.

docs/cmake-toml.md

@@ -2,14 +2,15 @@
 layout: page
 title: Reference
 permalink: /cmake-toml/
-nav_order: 1
+nav_order: 3
 ---
 
 # Reference
 
 This page is a reference for the options in the `cmake.toml` file. If you think anything is missing or unclear, please [edit this page](https://github.com/build-cpp/cmkr/edit/main/docs/cmake-toml.md) or open an [issue](https://github.com/build-cpp/cmkr/issues).
 
-See the [examples](/examples) section for concrete examples.
+This is a reference page. Check out the [examples](/examples) and the [cmkr topic](https://github.com/topics/cmkr) as well.
+{:.info}
 
 ## CMake configuration
 
@@ -27,6 +28,7 @@ name = "myproject"
 version = "1.0.0"
 description = "Description of the project"
 languages = ["C", "CXX"]
+msvc-runtime = "" # dynamic (implicit default), static
 cmake-before = """
 message(STATUS "CMake injected before the project() call")
 """
@@ -37,17 +39,45 @@ include-before = ["cmake/before-project.cmake"]
 include-after = ["cmake/after-project.cmake"]
 ```
 
+### Languages
+
+Supported languages are (see [`enable_language`](https://cmake.org/cmake/help/latest/command/enable_language.html) for more information):
+
+- `C`
+- `CXX` → C++
+- `CSharp` → C#
+- `CUDA`
+- `OBJC` → Objective-C
+- `OBJCXX` → Objective-C++
+- `Fortran`
+- `HIP`
+- `ISPC`
+- `Swift`
+- `ASM`
+- `ASM_MASM` → [Microsoft Macro Assembler (MASM)](https://learn.microsoft.com/en-US/cpp/assembler/masm/masm-for-x64-ml64-exe)
+- `ASM_NASM` → [Netwide Assembler (NASM)](https://www.nasm.us)
+- `ASM_MARMASM` [Microsoft ARM Assembler](https://learn.microsoft.com/en-us/cpp/assembler/arm/arm-assembler-command-line-reference)
+- `ASM-ATT`
+- `Java` (undocumented)
+- `RC` (undocumented)
+
+After a language is enabled, adding sources files with the corresponding extension to your target will automatically use the appropriate compiler/assembler for it.
+
+_Note_: It is generally discouraged to disable the `C` language, unless you are absolutely sure it is not used. Sometimes projects added with `fetch-content` implicitly require it and the error messages can be extremely confusing.
+
 ## Conditions
 
-You can specify your own conditions and use them in any `condition` field:
+You can specify your own named conditions and use them in any `condition` field:
 
 ```toml
 [conditions]
-arch64 = "CMAKE_SIZEOF_VOID_P EQUALS 8"
+ptr64 = "CMAKE_SIZEOF_VOID_P EQUAL 8"
-arch32 = "CMAKE_SIZEOF_VOID_P EQUALS 4"
+ptr32 = "CMAKE_SIZEOF_VOID_P EQUAL 4"
 ```
 
-This will make the `arch64` and `arch32` conditions available with their respective CMake expressions. 
+This will make the `ptr64` and `ptr32` conditions available with their respective CMake expressions.
+
+**Note**: condition names can only contain lower-case alphanumeric characters (`[0-9a-z]`) and dashes (`-`).
 
 You can also prefix most keys with `condition.` to represent a conditional:
 
@@ -55,9 +85,13 @@ You can also prefix most keys with `condition.` to represent a conditional:
 [target]
 type = "executable"
 sources = ["src/main.cpp"]
-windows.sources = ["src/windows_specific.cpp"]
+ptr64.sources = ["src/ptr64_only.cpp"]
 ```
 
+Instead of a named condition you can also specify a [CMake expression](https://cmake.org/cmake/help/latest/command/if.html#condition-syntax) in quotes. Instances of `$<name>` are replaced with the corresponding condition. For example: `"CONDITIONS_BUILD_TESTS AND $<linux>"` becomes `CONDITIONS_BUILD_TESTS AND (CMAKE_SYSTEM_NAME MATCHES "Linux")` in the final `CMakeLists.txt` file.
+
+### Predefined conditions
+
 The following conditions are predefined (you can override them if you desire):
 
 ```toml
@@ -68,11 +102,20 @@ unix = "UNIX"
 bsd = "CMAKE_SYSTEM_NAME MATCHES \"BSD\""
 linux = "CMAKE_SYSTEM_NAME MATCHES \"Linux\""
 gcc = "CMAKE_CXX_COMPILER_ID STREQUAL \"GNU\" OR CMAKE_C_COMPILER_ID STREQUAL \"GNU\""
-clang = "CMAKE_CXX_COMPILER_ID MATCHES \"Clang\" OR CMAKE_C_COMPILER_ID MATCHES \"Clang\""
 msvc = "MSVC"
+clang = "(CMAKE_CXX_COMPILER_ID MATCHES \"Clang\" AND NOT CMAKE_CXX_COMPILER_FRONTEND_VARIANT MATCHES \"^MSVC$\") OR (CMAKE_C_COMPILER_ID MATCHES \"Clang\" AND NOT CMAKE_C_COMPILER_FRONTEND_VARIANT MATCHES \"^MSVC$\")"
+clang-cl = "(CMAKE_CXX_COMPILER_ID MATCHES \"Clang\" AND CMAKE_CXX_COMPILER_FRONTEND_VARIANT MATCHES \"^MSVC$\") OR (CMAKE_C_COMPILER_ID MATCHES \"Clang\" AND CMAKE_C_COMPILER_FRONTEND_VARIANT MATCHES \"^MSVC$\")"
+clang-any = "CMAKE_CXX_COMPILER_ID MATCHES \"Clang\" OR CMAKE_C_COMPILER_ID MATCHES \"Clang\""
 root = "CMKR_ROOT_PROJECT"
 x64 = "CMAKE_SIZEOF_VOID_P EQUAL 8"
 x32 = "CMAKE_SIZEOF_VOID_P EQUAL 4"
+android = "ANDROID"
+apple = "APPLE"
+bsd = "BSD"
+cygwin = "CYGWIN"
+ios = "IOS"
+xcode = "XCODE"
+wince = "WINCE"
 ```
 
 ## Subdirectories
@@ -90,18 +133,47 @@ include-before = ["cmake/before-subdir.cmake"]
 include-after = ["cmake/after-subdir.cmake"]
 ```
 
+## Options
+
+```toml
+[options]
+MYPROJECT_BUILD_TESTS = false
+MYPROJECT_SPECIAL_OPTION = { value = true, help = "Docstring for this option." }
+MYPROJECT_BUILD_EXAMPLES = "root"
+```
+
+Options correspond to [CMake cache variables](https://cmake.org/cmake/help/book/mastering-cmake/chapter/CMake%20Cache.html) that can be used to customize your project at configure-time. You can configure with `cmake -DMYPROJECT_BUILD_TESTS=ON` to enable the option. Every option automatically gets a corresponding [condition](#conditions). Additionally, a normalized condition is created based on the `[project].name` (i.e. `MYPROJECT_BUILD_TESTS` becomes `build-tests`).
+
+The special value `root` can be used to set the option to `true` if the project is compiled as the root project (it will be `false` if someone is including your project via `[fetch-content]` or `[subdir]`).
+
+## Variables
+
+```toml
+[variables]
+MYBOOL = true
+MYSTRING = "hello"
+```
+
+Variables emit a [`set`](https://cmake.org/cmake/help/latest/command/set.html) and can be used to configure subprojects and packages.
+
 ## Vcpkg
 
 ```toml
 [vcpkg]
-version = "2021.05.12"
+version = "2024.11.16"
-url = "https://github.com/microsoft/vcpkg/archive/refs/tags/2021.05.12.tar.gz"
+url = "https://github.com/microsoft/vcpkg/archive/refs/tags/2024.11.16.tar.gz"
 packages = ["fmt", "zlib"]
+overlay-ports = ["my-ports"]
+overlay-triplets = ["my-triplets"]
 ```
 
-The vcpkg `version` will automatically generate the `url` from the [official repository](https://github.com/microsoft/vcpkg/releases). For a custom registry you can specify your own `url` (and omit the `version`). You can browse available packages on [vcpkg.io](https://vcpkg.io/en/packages.html).
+The vcpkg `version` will automatically generate the `url` from the [official repository](https://github.com/microsoft/vcpkg/releases). For a custom registry you can specify your own `url` (and omit the `version`). You can browse available packages on [vcpkg.io](https://vcpkg.io/en/packages.html) or [vcpkg.link](https://vcpkg.link).
 
-To specify package features you can use the following syntax: `imgui[docking-experimental,freetype,sdl2-binding,opengl3-binding]`.
+To specify package features you can use the following syntax: `imgui[docking-experimental,freetype,sdl2-binding,opengl3-binding]`. To disable the [default features](https://learn.microsoft.com/en-us/vcpkg/concepts/default-features) you can do: `cpp-httplib[core,openssl]`
+
+The `overlay-ports` feature allows you to embed vcpkg ports inside your project, without having to fork the main vcpkg registry or creating a custom registry. You can find more information in the relevant [documentation](https://learn.microsoft.com/en-us/vcpkg/concepts/overlay-ports). The `overlay-triplets` feature allows you to customize triplets and change the default behavior (for example always preferring static libraries on Windows). To specify both in one go you can do `[vcpkg].overlay = "vcpkg-overlay"`.
+
+For a concrete example of all the features, take a look at the [vcpkg_template](https://github.com/build-cpp/vcpkg_template) repository.
 
 ## Packages
 
@@ -119,49 +191,60 @@ components = ["mycomponent"]
 **Note**: The `[fetch-content]` feature is unpolished and will likely change in a future release.
 
 ```toml
+# Include CMake project from git
 [fetch-content.gitcontent]
 condition = "mycondition"
 git = "https://github.com/myuser/gitcontent"
 tag = "v0.1"
+shallow = false # shallow clone (--depth 1)
+system = false
+subdir = "" # folder containing CMakeLists.txt
+
+# Include a CMake project from a URL
+[fetch-content.urlcontent]
+condition = "mycondition"
+url = "https://content-host.com/urlcontent.zip"
+# Other supported algorithms:
+# md5, sha1, sha224, sha256, sha384, sha512, sha3_224, sha3_256, sha3_384, sha3_512
+hash = "SHA1 502a4e25b8b209889c99c7fa0732102682c2e4ff"
+sha1 = "502a4e25b8b209889c99c7fa0732102682c2e4ff"
 
 [fetch-content.svncontent]
 condition = "mycondition"
 svn = "https://svn-host.com/url"
 rev = "svn_rev"
-
-[fetch-content.urlcontent]
-condition = "mycondition"
-url = "https://content-host.com/urlcontent.zip"
-hash = "123123123123"
 ```
 
+Table keys that match CMake variable names (`[A-Z_]+`) will be passed to the [`FetchContent_Declare`](https://cmake.org/cmake/help/latest/module/FetchContent.html#command:fetchcontent_declare) command.
+
 ## Targets
 
 ```toml
 [target.mytarget]
 condition = "mycondition"
 alias = "mytarget::mytarget"
-type = "static" # executable, shared (DLL), static, interface, object, library, custom
+type = "static" # executable, library, shared (DLL), static, interface, object, custom
 headers = ["src/mytarget.h"]
 sources = ["src/mytarget.cpp"]
+msvc-runtime = "" # dynamic (implicit default), static
 
 # The keys below match the target_xxx CMake commands
 # Keys prefixed with private- will get PRIVATE visibility
-compile-definitions = [""]
+compile-definitions = [""] # preprocessor define (-DFOO)
 private-compile-definitions = [""]
-compile-features = [""]
+compile-features = [""] # C++ standard version (cxx_std_20)
 private-compile-features = [""]
-compile-options = [""]
+compile-options = [""] # compiler flags
 private-compile-options = [""]
-include-directories = [""]
+include-directories = [""] # include paths/directories
 private-include-directories = [""]
-link-directories = [""]
+link-directories = [""] # library directories
 private-link-directories = [""]
-link-libraries = [""]
+link-libraries = [""] # dependencies
 private-link-libraries = [""]
-link-options = [""]
+link-options = [""] # linker flags
 private-link-options = [""]
-precompile-headers = [""]
+precompile-headers = [""] # precompiled headers
 private-precompile-headers = [""]
 
 cmake-before = """
@@ -180,6 +263,60 @@ CXX_STANDARD_REQUIRED = true
 FOLDER = "MyFolder"
 ```
 
+A table mapping the cmkr features to the relevant CMake construct and the relevant documentation pages:
+
+| cmkr | CMake construct | Description |
+| ---- | ----- | ----------- |
+| `alias` | [Alias Libraries](https://cmake.org/cmake/help/latest/command/add_library.html#alias-libraries) | Create an [alias target](https://cmake.org/cmake/help/latest/manual/cmake-buildsystem.7.html#alias-targets), used for namespacing or clarity. |
+| `sources` | [`target_sources`](https://cmake.org/cmake/help/latest/command/target_sources.html) | Source files (`PRIVATE` except `interface` targets). |
+| `headers` | [`target_sources`](https://cmake.org/cmake/help/latest/command/target_sources.html) | For readability (and future packaging). |
+| `msvc-runtime` | [`MSVC_RUNTIME_LIBRARY`](https://cmake.org/cmake/help/latest/prop_tgt/MSVC_RUNTIME_LIBRARY.html) | The [CMP0091](https://cmake.org/cmake/help/latest/policy/CMP0091.html) policy is set automatically. |
+| `compile-definitions` | [`target_compile_definitions`](https://cmake.org/cmake/help/latest/command/target_compile_definitions.html) | Adds a macro definition (define, `-DMYMACRO=XXX`). |
+| `compile-features` | [`target_compile_features`](https://cmake.org/cmake/help/latest/command/target_compile_features.html) | Specifies the C++ standard version (`cxx_std_20`). |
+| `compile-options` | [`target_compile_options`](https://cmake.org/cmake/help/latest/command/target_compile_options.html) | Adds compiler flags. |
+| `include-directories` | [`target_include_directories`](https://cmake.org/cmake/help/latest/command/target_include_directories.html) | Adds include directories. |
+| `link-directories` | [`target_link_directories`](https://cmake.org/cmake/help/latest/command/target_link_directories.html) | Adds library directories. |
+| `link-libraries` | [`target_link_libraries`](https://cmake.org/cmake/help/latest/command/target_link_libraries.html) | Adds library dependencies. Use `::mylib` to make sure a target exists. |
+| `link-options` | [`target_link_options`](https://cmake.org/cmake/help/latest/command/target_link_options.html) | Adds linker flags. |
+| `precompile-headers` | [`target_precompile_headers`](https://cmake.org/cmake/help/latest/command/target_precompile_headers.html) | Specifies precompiled headers. |
+| `properties` | [`set_target_properties`](https://cmake.org/cmake/help/latest/command/set_target_properties.html) | See [properties on targets](https://cmake.org/cmake/help/latest/manual/cmake-properties.7.html#properties-on-targets) for more information. |
+
+The default [visibility](/basics) is as follows:
+
+| Type         | Visibility  |
+| ------------ | ----------- |
+| `executable` | `PRIVATE`   |
+| `library`    | `PUBLIC`    |
+| `shared`     | `PUBLIC`    |
+| `static`     | `PUBLIC`    |
+| `object`     | `PUBLIC`    |
+| `interface`  | `INTERFACE` |
+
+## Templates
+
+To avoid repeating yourself you can create your own target type and use it in your targets:
+
+```toml
+[template.example]
+condition = "MYPROJECT_BUILD_EXAMPLES"
+type = "executable"
+link-libraries = ["myproject::mylib"]
+add-function = ""
+add-arguments = ["myoption"]
+pass-sources = false
+
+# Properties from the template are merged with the ones here
+[target.myexample]
+type = "example"
+sources = ["src/myexample.cpp"]
+```
+
+The properties declared on a `template` are the same as the ones you use for targets. The only exceptions are:
+
+- `add-function`: Specifies a custom add function. Projects like [pybind11](https://pybind11.readthedocs.io/en/stable/cmake/index.html#new-findpython-mode) have their own `add_xxx` function, which you can specify here.
+- `add-arguments`: Arguments to pass to the `add-function` before the list of sources. See [cmake_parse_arguments](https://cmake.org/cmake/help/latest/command/cmake_parse_arguments.html) for more details.
+- `pass-sources`: Pass sources directly to the add function instead of using `target_sources`.
+
 ## Tests and installation (unfinished)
 
 **Note**: The `[[test]]` and `[[install]]` are unfinished features and will likely change in a future release.
@@ -200,7 +337,9 @@ working-directory = "mytest-dir"
 condition = "mycondition"
 targets = ["mytarget", "mytest"]
 destination = ["bin"]
+component = "mycomponent"
 files = ["content/my.png"]
-dirs = [""]
+dirs = ["include"]
-configs = [""]
+configs = ["Release", "Debug"]
+optional = false
 ```

docs/examples/compile-options.md

@@ -0,0 +1,34 @@
+---
+# Automatically generated from tests/compile-options/cmake.toml - DO NOT EDIT
+layout: default
+title: Compiler flags
+permalink: /examples/compile-options
+parent: Examples
+nav_order: 9
+---
+
+# Compiler flags
+
+Example project that sets compiler flags and preprocessor defines for various platforms.
+
+```toml
+[project]
+name = "compile-options"
+description = "Compiler flags"
+
+[target.hello]
+type = "executable"
+sources = ["src/main.cpp"]
+msvc.compile-options = ["/W2"]
+msvc.compile-definitions = ["PLATFORM=\"msvc\""]
+gcc.compile-options = ["-Wall"]
+gcc.compile-definitions = ["PLATFORM=\"gcc\""]
+clang.compile-options = ["-Wall"]
+clang.compile-definitions = ["PLATFORM=\"clang\""]
+```
+
+The `hello` target uses [conditions](/cmake-toml#conditions) to set different compiler flags and definitions depending on the platform. See the [targets](/cmake-toml/#targets) documentation for other things you can set.
+
+_Note_: In general you only want to specify flags _required_ to compile your code without errors.
+
+<sup><sub>This page was automatically generated from [tests/compile-options/cmake.toml](https://github.com/build-cpp/cmkr/tree/main/tests/compile-options/cmake.toml).</sub></sup>

docs/examples/fetch-content.md

@@ -16,8 +16,9 @@ Downloads [fmt v7.1.3](https://fmt.dev/7.1.3/) from [GitHub](https://github.com)
 name = "fetch-content"
 description = "Fetching from git"
 
-[fetch-content]
+[fetch-content.fmt]
-fmt = { git = "https://github.com/fmtlib/fmt", tag = "7.1.3" }
+git = "https://github.com/fmtlib/fmt"
+tag = "7.1.3"
 
 [target.example]
 type = "executable"

docs/examples/msvc-runtime.md

@@ -0,0 +1,34 @@
+---
+# Automatically generated from tests/msvc-runtime/cmake.toml - DO NOT EDIT
+layout: default
+title: Static MSVC runtime
+permalink: /examples/msvc-runtime
+parent: Examples
+nav_order: 8
+---
+
+# Static MSVC runtime
+
+
+
+```toml
+[project]
+name = "msvc-runtime"
+description = "Static MSVC runtime"
+msvc-runtime = "static"
+
+# This target will compile with a static runtime
+[target.static-runtime]
+type = "executable"
+sources = ["src/main.cpp"]
+
+# This target overrides the [project].msvc-runtime
+[target.dynamic-runtime]
+type = "executable"
+sources = ["src/main.cpp"]
+msvc-runtime = "dynamic"
+```
+
+
+
+<sup><sub>This page was automatically generated from [tests/msvc-runtime/cmake.toml](https://github.com/build-cpp/cmkr/tree/main/tests/msvc-runtime/cmake.toml).</sub></sup>

docs/examples/objective-c.md

@@ -0,0 +1,30 @@
+---
+# Automatically generated from tests/objective-c/cmake.toml - DO NOT EDIT
+layout: default
+title: Objective-C
+permalink: /examples/objective-c
+parent: Examples
+nav_order: 11
+---
+
+# Objective-C
+
+Add Objective-C sources on Apple platforms:
+
+```toml
+[project]
+name = "objective-c"
+description = "Objective-C"
+languages = ["C"]
+apple.languages = ["OBJC"]
+
+[target.hello]
+type = "executable"
+sources = ["src/main.c"]
+apple.sources = ["src/apple.m"]
+apple.link-libraries = ["$<LINK_LIBRARY:FRAMEWORK,Foundation>"]
+```
+
+
+
+<sup><sub>This page was automatically generated from [tests/objective-c/cmake.toml](https://github.com/build-cpp/cmkr/tree/main/tests/objective-c/cmake.toml).</sub></sup>

docs/examples/templates.md

@@ -20,11 +20,11 @@ description = "Target templates"
 type = "executable"
 sources = ["src/templates.cpp"]
 compile-definitions = ["IS_APP"]
-
 # Unlike interface targets you can also inherit properties
-[template.app.properties]
+properties = {
-CXX_STANDARD = "11"
+    CXX_STANDARD = "11",
-CXX_STANDARD_REQUIRED = true
+    CXX_STANDARD_REQUIRED = true,
+}
 
 [target.app-a]
 type = "app"

docs/examples/vcpkg.md

@@ -9,7 +9,7 @@ nav_order: 4
 
 # Dependencies from vcpkg
 
-Downloads [fmt v7.1.3](https://fmt.dev/7.1.3/) using [vcpkg](https://vcpkg.io/) and links an `example` target to it:
+Downloads [fmt v7.1.3](https://fmt.dev/7.1.3/) using [vcpkg](https://github.com/microsoft/vcpkg) and links an `example` target to it:
 
 ```toml
 [project]
@@ -17,13 +17,12 @@ name = "vcpkg"
 description = "Dependencies from vcpkg"
 
 # See https://github.com/microsoft/vcpkg/releases for vcpkg versions
-# See https://vcpkg.io/en/packages.html for available packages
+# See https://vcpkg.io/en/packages or https://vcpkg.link for available packages
 [vcpkg]
-version = "2021.05.12"
+version = "2024.11.16"
 packages = ["fmt"]
 
-[find-package]
+[find-package.fmt]
-fmt = {}
 
 [target.example]
 type = "executable"

docs/index.md

@@ -1,12 +1,12 @@
 ---
 layout: home
-title: Index
+title: Documentation
 nav_order: 0
 ---
 
-# Index
+# Documentation
 
-`cmkr`, pronounced "cmaker", is a modern build system based on [CMake](https://cmake.org/) and [TOML](https://toml.io).
+[`cmkr`](https://github.com/build-cpp/cmkr), pronounced "cmaker", is a modern build system based on [CMake](https://cmake.org/) and [TOML](https://toml.io).
 
 `cmkr` parses `cmake.toml` files and generates a modern, idiomatic `CMakeLists.txt` for you. A minimal example:
 
@@ -19,27 +19,29 @@ type = "executable"
 sources = ["src/main.cpp"]
 ```
 
-`cmkr` can bootstrap itself from CMake and you only need CMake to use it.
+`cmkr` can bootstrap itself, and you only need CMake and a C++ compiler to use it.
 
 ## Getting started
 
-To get started run the following commands from your project directory:
+To get started, run the following commands from your project directory:
 
 ```sh
 curl https://raw.githubusercontent.com/build-cpp/cmkr/main/cmake/cmkr.cmake -o cmkr.cmake
 cmake -P cmkr.cmake
 ```
 
-After the bootstrapping process finishes, modify [`cmake.toml`](https://build-cpp.github.io/cmkr/cmake-toml) and open the project in your favorite IDE or build with CMake:
+After the bootstrapping process finishes, customize [`cmake.toml`](./cmake-toml) for your project and run CMake:
 
 ```sh
 cmake -B build
 cmake --build build
 ```
 
-Once bootstrapped, `cmkr` does not introduce extra steps to your workflow. After modifying `cmake.toml` you simply build/configure your CMake project and `cmkr` will automatically regenerate `CMakeLists.txt`.
+Once bootstrapped, `cmkr` does not introduce extra steps to your workflow. After modifying `cmake.toml` you simply build/configure your CMake project and `cmkr` will automatically regenerate `CMakeLists.txt` when necessary.
 
-In CI settings the `cmkr` bootstrapping process is skipped so there is no extra configure-time overhead in your pipelines.
+<sub>**Note**: The `cmake.toml` project file, generated `CMakeLists.txt` and `cmkr.cmake` bootstrapping script are all intended to be added to source control.</sub>
+
+In CI environments the `cmkr` bootstrapping process is skipped, so there is no additional overhead in your pipelines.
 
 ## Template repositories
 
@@ -59,10 +61,10 @@ Optionally you can put a [`cmkr` release](https://github.com/build-cpp/cmkr/rele
 ```
 Usage: cmkr [arguments]
 arguments:
-    init    [executable|library|shared|static|interface] Starts a new project in the same directory.
+    init    [executable|library|shared|static|interface] Create a project.
     gen                                                  Generates CMakeLists.txt file.
     build   <extra cmake args>                           Run cmake and build.
-    install                                              Run cmake --install. Needs admin privileges.
+    install                                              Run cmake --install.
     clean                                                Clean the build directory.
     help                                                 Show help.
     version                                              Current cmkr version.
@@ -70,8 +72,10 @@ arguments:
 
 ## Credits
 
-- https://github.com/gulrak/filesystem
+- [gulrak/filesystem](https://github.com/gulrak/filesystem)
-- https://github.com/Tessil/ordered-map
+- [Tessil/ordered-map](https://github.com/Tessil/ordered-map)
-- https://github.com/ToruNiina/toml11
+- [ToruNiina/toml11](https://github.com/ToruNiina/toml11)
-- https://github.com/mpark/variant
+- [mpark/variant](https://github.com/mpark/variant)
-- https://www.svgrepo.com/svg/192268/hammer
+- [SVG Repo Hammer](https://www.svgrepo.com/svg/192268/hammer)
+- [can1357](https://github.com/can1357) for buying `cmkr.build` ❤️
+- [JustasMasiulis](https://github.com/JustasMasiulis) for fixing the dark theme ❤️

docs/philosophy.md

@@ -0,0 +1,83 @@
+---
+layout: page
+title: Philosophy
+nav_order: 2
+published: false
+---
+
+# Philosophy
+
+## Problem statement
+
+Similar to writing good C++, writing good CMake is difficult. The main difference is that nobody actually wants to learn CMake. The build system is something that should "just work".
+
+There have been many attempts at creating new build systems (with varying levels of success). Naturally this causes [competing standards](https://xkcd.com/927/), which is undesirable. CMake is pretty much the de facto standard, and it has seen extensive use in complex software projects.
+
+One of the main issues of CMake is the turing-complete scripting language you use to describe your projects. As your project gets more complex this can be very helpful, but it also unnecessarily complicates simple projects. There have been discussions about a declarative language on the [CMake issue tracker](https://gitlab.kitware.com/cmake/cmake/-/issues/19891) to solve this problem, but it looks like a "LISP-like" language is seriously being considered...
+
+## The solution
+
+The way cmkr (pronounced "cmaker") solves this problem is by using [TOML](https://toml.io/). Below is a minimal `cmake.toml` project:
+
+```toml
+[project]
+name = "cmkr_for_beginners"
+
+[target.hello_world]
+type = "executable"
+sources = ["src/main.cpp"]
+```
+
+The key difference between `cmkr` and other build systems is that it _generates_ CMake. This means that your projects are fully compatible with the CMake ecosystem, and you can try it out without having to rewrite your whole build system.
+
+TODO: link/include more examples? Talk about conditions, packaging (missing)
+
+### Another layer?!
+
+A common issue people have with cmkr is that it introduces an additional layer of indirection to your build system. CMake is already a meta-buildsystem, which means you could call cmkr a "meta-meta-buildsystem".
+
+Presumably the reason for this friction is that additional layers of abstraction introduce additional complexity. Because of this cmkr has been designed to be completely seamless:
+
+- The user doesn't have to install any additional software to use cmkr. All you need is a semi-recent version of CMake and a C++ compiler.
+- Modifying `cmake.toml` automatically triggers a regeneration of `CMakeLists.txt`. There is no change to your build process.
+- The `CMakeLists.txt` is generated to be human-readable. This means you can easily "eject" from cmkr and go back to CMake.
+
+An additional argument for cmkr is that anecdotally people say it "just works". Because of its simplicity it's also easy to teach, even to people without programming experience.
+
+There is also precedent in the JavaScript community. Bundlers and translators are the norm there and their developer experience is miles ahead of C++.
+
+<sub>Not to say the JavaScript ecosystem is without its flaws, but generators does not appear to be one of them</sub>
+
+### Unsupported features
+
+Because cmkr is still in early in development there are many missing/unfinished features. It was decided that users can bridge the gap by including CMake at arbitrary locations.
+
+This has the advantage that it forces complexity in the build system to be self-contained and modular, a problem all too common in projects as they age.
+
+## Enterprise
+
+Words like "bootstrapping" and "generating code" might worry engineers working in an enterprise environment, and rightly so. From the beginning it has been a priority to make cmkr suitable for use in big corporations with strict protocols for security and reproducibility.
+
+### No additional dependencies
+
+As mentioned above, the only thing you need is a working C++ compiler and a semi-recent version of CMake. It is assumed that you are already building (and executing) C++ projects on your servers, so cmkr does not introduce additional requirements.
+
+All the logic for downloading and compiling the `cmkr` executable is self-contained in a ~250 line `cmkr.cmake` script. You can easily audit it and see if it's up to your standards.
+
+### Reproducibility
+
+Per default the `cmkr.cmake` bootstrapping script contains the exact version of cmkr used to generate your project. As long as the cmkr repository is available you will build the exact same version of cmkr, which will generate the exact same `CMakeLists.txt` file.
+
+This also means that cmkr can decide to break backwards compatibility without affecting legacy projects. An effort will always be made to maintain backwards compatibility though.
+
+### Integrity
+
+As an additional safeguard you can modify `cmkr.cmake` to pin the version tag to a commit hash. This hash is checked to ensure the integrity of the upstream repository.
+
+### Availability
+
+You can easily point `cmkr.cmake` to a mirror of the cmkr repository to ensure availability should something catastrophic happen.
+
+### Not executed in CI
+
+The final (and key) feature is that the bootstrapping process is never executed in CI environments. This means `cmkr` is only ever executed on your developer's machines and not on your infrastructure.

docs/run-locally.sh

@@ -1,2 +0,0 @@
-bundle exec just-the-docs rake search:init
-bundle exec jekyll serve --livereload

include/arguments.hpp

@@ -7,5 +7,3 @@ const char *handle_args(int argc, char **argv);
 
 } // namespace args
 } // namespace cmkr
-
-const char *cmkr_args_handle_args(int, char **);

include/build.hpp

@@ -11,9 +11,3 @@ int install();
 
 } // namespace build
 } // namespace cmkr
-
-int cmkr_build_run(int argc, char **argv);
-
-int cmkr_build_clean();
-
-int cmkr_build_install();

include/error.hpp

@@ -1,27 +0,0 @@
-#pragma once
-
-namespace cmkr {
-namespace error {
-
-struct Status {
-    enum class Code {
-        Success = 0,
-        RuntimeError,
-        InitError,
-        GenerationError,
-        BuildError,
-        CleanError,
-        InstallError,
-    };
-    Status(Code ec) noexcept;
-    operator int() const noexcept;
-    Code code() const noexcept;
-
-  private:
-    Code ec_ = Code::Success;
-};
-
-} // namespace error
-} // namespace cmkr
-
-const char *cmkr_error_status_string(int);

include/fs.hpp

@@ -1,8 +1,6 @@
 #pragma once
 
-#if ((defined(_MSVC_LANG) && _MSVC_LANG >= 201703L) ||                                             \
+#if ((defined(_MSVC_LANG) && _MSVC_LANG >= 201703L) || (defined(__cplusplus) && __cplusplus >= 201703L)) && defined(__has_include)
-     (defined(__cplusplus) && __cplusplus >= 201703L)) &&                                          \
-    defined(__has_include)
 #if __has_include(<filesystem>) && (!defined(__MAC_OS_X_VERSION_MIN_REQUIRED) || __MAC_OS_X_VERSION_MIN_REQUIRED >= 101500)
 #define GHC_USE_STD_FS
 #include <filesystem>

include/help.hpp

@@ -9,7 +9,3 @@ const char *message() noexcept;
 
 } // namespace help
 } // namespace cmkr
-
-const char *cmkr_help_version(void);
-
-const char *cmkr_help_message(void);

include/project_parser.hpp

@@ -1,9 +1,11 @@
 #pragma once
 
-#include <mpark/variant.hpp>
-#include <string>
-#include <tsl/ordered_map.h>
 #include <vector>
+#include <string>
+
+#include <mpark/variant.hpp>
+#include <tsl/ordered_map.h>
+#include <tsl/ordered_set.h>
 
 namespace cmkr {
 namespace parser {
@@ -13,18 +15,18 @@ using Condition = tsl::ordered_map<std::string, T>;
 
 using ConditionVector = Condition<std::vector<std::string>>;
 
-struct Setting {
+struct Variable {
     std::string name;
-    std::string comment;
+    std::string help;
-    mpark::variant<bool, std::string> val;
+    mpark::variant<bool, std::string> value;
     bool cache = false;
     bool force = false;
 };
 
 struct Option {
     std::string name;
-    std::string comment;
+    std::string help;
-    bool val = false;
+    mpark::variant<bool, std::string> value;
 };
 
 struct Package {
@@ -43,9 +45,18 @@ struct Vcpkg {
     struct Package {
         std::string name;
         std::vector<std::string> features;
+        bool default_features = true;
     };
 
     std::vector<Package> packages;
+
+    // https://github.com/Microsoft/vcpkg-docs/blob/main/vcpkg/users/buildsystems/cmake-integration.md
+    std::vector<std::string> overlay_ports;
+    std::vector<std::string> overlay_triplets;
+
+    bool enabled() const {
+        return !packages.empty();
+    }
 };
 
 enum TargetType {
@@ -67,7 +78,6 @@ struct Target {
     TargetType type = target_last;
     std::string type_name;
 
-    ConditionVector headers;
     ConditionVector sources;
 
     // https://cmake.org/cmake/help/latest/manual/cmake-commands.7.html#project-commands
@@ -95,6 +105,8 @@ struct Target {
     ConditionVector precompile_headers;
     ConditionVector private_precompile_headers;
 
+    ConditionVector dependencies;
+
     std::string condition;
     std::string alias;
     Condition<tsl::ordered_map<std::string, std::string>> properties;
@@ -108,6 +120,7 @@ struct Target {
 struct Template {
     Target outline;
     std::string add_function;
+    std::vector<std::string> add_arguments;
     bool pass_sources_to_add_function = false;
 };
 
@@ -128,6 +141,7 @@ struct Install {
     std::vector<std::string> configs;
     std::string destination;
     std::string component;
+    bool optional = false;
 };
 
 struct Subdir {
@@ -149,9 +163,21 @@ struct Content {
     Condition<std::string> cmake_after;
     ConditionVector include_before;
     ConditionVector include_after;
+    bool system = false;
+    std::string subdir;
 };
 
+enum MsvcRuntimeType {
+    msvc_dynamic,
+    msvc_static,
+    msvc_last,
+};
+
+extern const char *msvcRuntimeTypeNames[msvc_last];
+
 struct Project {
+    const Project *parent;
+
     // This is the CMake version required to use all cmkr versions.
     std::string cmake_version = "3.15";
     std::string cmkr_include = "cmkr.cmake";
@@ -168,12 +194,14 @@ struct Project {
     std::string project_name;
     std::string project_version;
     std::string project_description;
-    std::vector<std::string> project_languages;
+    ConditionVector project_languages;
+    bool project_allow_unknown_languages = false;
+    MsvcRuntimeType project_msvc_runtime = msvc_last;
     Condition<std::string> cmake_before;
     Condition<std::string> cmake_after;
     ConditionVector include_before;
     ConditionVector include_after;
-    std::vector<Setting> settings;
+    std::vector<Variable> variables;
     std::vector<Option> options;
     std::vector<Package> packages;
     Vcpkg vcpkg;
@@ -186,6 +214,9 @@ struct Project {
     std::vector<Subdir> subdirs;
 
     Project(const Project *parent, const std::string &path, bool build);
+    const Project *root() const;
+    bool cmake_minimum_version(int major, int minor) const;
+    static bool is_condition_name(const std::string &name);
 };
 
 bool is_root_path(const std::string &path);

src/arguments.cpp

@@ -2,10 +2,8 @@
 #include "build.hpp"
 #include "cmake_generator.hpp"
 #include "help.hpp"
-
 #include "fs.hpp"
-#include <exception>
+
-#include <iostream>
 #include <stdexcept>
 #include <string>
 #include <vector>
@@ -37,17 +35,17 @@ const char *handle_args(int argc, char **argv) {
     } else if (main_arg == "build") {
         auto ret = build::run(argc, argv);
         if (ret)
-            return "CMake build error!";
+            throw std::runtime_error("CMake build failed!");
         return "CMake build completed!";
     } else if (main_arg == "install") {
         auto ret = build::install();
         if (ret)
-            return "CMake install error!";
+            throw std::runtime_error("CMake install failed!");
         return "CMake install completed!";
     } else if (main_arg == "clean") {
         auto ret = build::clean();
         if (ret)
-            return "CMake clean error!";
+            throw std::runtime_error("CMake clean failed!");
         return "Cleaned build directory!";
     } else {
         throw std::runtime_error(cmkr::help::message());
@@ -55,13 +53,3 @@ const char *handle_args(int argc, char **argv) {
 }
 } // namespace args
 } // namespace cmkr
-
-const char *cmkr_args_handle_args(int argc, char **argv) {
-    try {
-        return cmkr::args::handle_args(argc, argv);
-    } catch (const std::exception &e) {
-        return e.what();
-    } catch (...) {
-        return "Unknown error!";
-    }
-}

src/build.cpp

@@ -1,14 +1,10 @@
 #include "build.hpp"
 #include "cmake_generator.hpp"
-#include "error.hpp"
 #include "project_parser.hpp"
 
 #include "fs.hpp"
-#include <cstddef>
 #include <cstdlib>
 #include <sstream>
-#include <stdexcept>
-#include <system_error>
 
 namespace cmkr {
 namespace build {
@@ -17,7 +13,7 @@ int run(int argc, char **argv) {
     parser::Project project(nullptr, ".", true);
     if (argc > 2) {
         for (int i = 2; i < argc; ++i) {
-            project.build_args.push_back(argv[i]);
+            project.build_args.emplace_back(argv[i]);
         }
     }
     std::stringstream ss;
@@ -48,13 +44,13 @@ int run(int argc, char **argv) {
 }
 
 int clean() {
-    bool ret = false;
+    bool success = false;
     parser::Project project(nullptr, ".", true);
     if (fs::exists(project.build_dir)) {
-        ret = fs::remove_all(project.build_dir);
+        success = fs::remove_all(project.build_dir);
         fs::create_directory(project.build_dir);
     }
-    return !ret;
+    return success ? EXIT_SUCCESS : EXIT_FAILURE;
 }
 
 int install() {
@@ -64,33 +60,3 @@ int install() {
 }
 } // namespace build
 } // namespace cmkr
-
-int cmkr_build_run(int argc, char **argv) {
-    try {
-        return cmkr::build::run(argc, argv);
-    } catch (const std::system_error &e) {
-        return e.code().value();
-    } catch (...) {
-        return cmkr::error::Status(cmkr::error::Status::Code::BuildError);
-    }
-}
-
-int cmkr_build_clean(void) {
-    try {
-        return cmkr::build::clean();
-    } catch (const std::system_error &e) {
-        return e.code().value();
-    } catch (...) {
-        return cmkr::error::Status(cmkr::error::Status::Code::CleanError);
-    }
-}
-
-int cmkr_build_install(void) {
-    try {
-        return cmkr::build::install();
-    } catch (const std::system_error &e) {
-        return e.code().value();
-    } catch (...) {
-        return cmkr::error::Status(cmkr::error::Status::Code::InstallError);
-    }
-}

src/error.cpp

@@ -1,25 +0,0 @@
-#include "error.hpp"
-
-#include <cassert>
-
-namespace cmkr {
-namespace error {
-
-Status::Status(Code ec) noexcept : ec_(ec) {}
-
-Status::operator int() const noexcept { return static_cast<int>(ec_); }
-
-Status::Code Status::code() const noexcept { return ec_; }
-
-} // namespace error
-} // namespace cmkr
-
-// strings for cmkr::error::Status::Code
-static const char *err_string[] = {
-    "Success", "Runtime error", "Initialization error", "CMake generation error", "Build error", "Clean error", "Install error",
-};
-
-const char *cmkr_error_status(int i) {
-    assert(i >= 0 && i < (sizeof(err_string) / sizeof(*(err_string))));
-    return err_string[i];
-}

src/help.cpp

@@ -4,7 +4,9 @@
 namespace cmkr {
 namespace help {
 
-const char *version() noexcept { return "cmkr version " CMKR_VERSION; }
+const char *version() noexcept {
+    return "cmkr version " CMKR_VERSION;
+}
 
 const char *message() noexcept {
     return R"lit(
@@ -21,7 +23,3 @@ arguments:
 }
 } // namespace help
 } // namespace cmkr
-
-const char *cmkr_help_version(void) { return cmkr::help::version(); }
-
-const char *cmkr_help_message(void) { return cmkr::help::message(); }

src/project_parser.cpp

@@ -4,8 +4,6 @@
 #include <deque>
 #include <stdexcept>
 #include <toml.hpp>
-#include <tsl/ordered_map.h>
-#include <tsl/ordered_set.h>
 
 namespace cmkr {
 namespace parser {
@@ -21,16 +19,27 @@ static TargetType parse_targetType(const std::string &name) {
     return target_last;
 }
 
+const char *msvcRuntimeTypeNames[msvc_last] = {"dynamic", "static"};
+
+static MsvcRuntimeType parse_msvcRuntimeType(const std::string &name) {
+    for (int i = 0; i < msvc_last; i++) {
+        if (name == msvcRuntimeTypeNames[i]) {
+            return static_cast<MsvcRuntimeType>(i);
+        }
+    }
+    return msvc_last;
+}
+
 using TomlBasicValue = toml::basic_value<toml::discard_comments, tsl::ordered_map, std::vector>;
 
-static std::string format_key_error(const std::string &error, const toml::key &ky, const TomlBasicValue &value) {
+static std::string format_key_message(const std::string &message, const toml::key &ky, const TomlBasicValue &value) {
     auto loc = value.location();
     auto line_number_str = std::to_string(loc.line());
     auto line_width = line_number_str.length();
-    auto line_str = loc.line_str();
+    const auto &line_str = loc.line_str();
 
     std::ostringstream oss;
-    oss << "[error] " << error << '\n';
+    oss << message << "\n";
     oss << " --> " << loc.file_name() << ':' << loc.line() << '\n';
 
     oss << std::string(line_width + 2, ' ') << "|\n";
@@ -48,14 +57,24 @@ static std::string format_key_error(const std::string &error, const toml::key &k
     return oss.str();
 }
 
+static void throw_key_error(const std::string &error, const toml::key &ky, const TomlBasicValue &value) {
+    throw std::runtime_error(format_key_message("[error] " + error, ky, value));
+}
+
+static void print_key_warning(const std::string &message, const toml::key &ky, const TomlBasicValue &value) {
+    puts(format_key_message("[warning] " + message, ky, value).c_str());
+}
+
 class TomlChecker {
     const TomlBasicValue &m_v;
     tsl::ordered_set<toml::key> m_visited;
     tsl::ordered_set<toml::key> m_conditionVisited;
 
   public:
-    TomlChecker(const TomlBasicValue &v, const toml::key &ky) : m_v(toml::find(v, ky)) {}
+    TomlChecker(const TomlBasicValue &v, const toml::key &ky) : m_v(toml::find(v, ky)) {
-    TomlChecker(const TomlBasicValue &v) : m_v(v) {}
+    }
+    explicit TomlChecker(const TomlBasicValue &v) : m_v(v) {
+    }
     TomlChecker(const TomlChecker &) = delete;
     TomlChecker(TomlChecker &&) = delete;
 
@@ -109,36 +128,40 @@ class TomlChecker {
         return toml::find(m_v, ky);
     }
 
-    void visit(const toml::key &ky) { m_visited.emplace(ky); }
+    void visit(const toml::key &ky) {
+        m_visited.emplace(ky);
+    }
 
-    bool visisted(const toml::key &ky) const { return m_visited.contains(ky); }
+    bool visisted(const toml::key &ky) const {
+        return m_visited.contains(ky);
+    }
 
     void check(const tsl::ordered_map<std::string, std::string> &conditions) const {
         for (const auto &itr : m_v.as_table()) {
             const auto &ky = itr.first;
             if (m_conditionVisited.contains(ky)) {
-                if (!conditions.contains(ky)) {
+                if (!conditions.contains(ky) && Project::is_condition_name(ky)) {
-                    throw std::runtime_error(format_key_error("Unknown condition '" + ky + "'", ky, itr.second));
+                    throw_key_error("Unknown condition '" + ky + "'", ky, itr.second);
                 }
 
                 for (const auto &jtr : itr.second.as_table()) {
                     if (!m_visited.contains(jtr.first)) {
-                        throw std::runtime_error(format_key_error("Unknown key '" + jtr.first + "'", jtr.first, jtr.second));
+                        throw_key_error("Unknown key '" + jtr.first + "'", jtr.first, jtr.second);
                     }
                 }
             } else if (!m_visited.contains(ky)) {
                 if (itr.second.is_table()) {
                     for (const auto &jtr : itr.second.as_table()) {
                         if (!m_visited.contains(jtr.first)) {
-                            throw std::runtime_error(format_key_error("Unknown key '" + jtr.first + "'", jtr.first, jtr.second));
+                            throw_key_error("Unknown key '" + jtr.first + "'", jtr.first, jtr.second);
                         }
                     }
                 }
-                throw std::runtime_error(format_key_error("Unknown key '" + ky + "'", ky, itr.second));
+                throw_key_error("Unknown key '" + ky + "'", ky, itr.second);
             } else if (ky == "condition") {
                 std::string condition = itr.second.as_string();
-                if (!conditions.contains(condition)) {
+                if (!conditions.contains(condition) && Project::is_condition_name(condition)) {
-                    throw std::runtime_error(format_key_error("Unknown condition '" + condition + "'", condition, itr.second));
+                    throw_key_error("Unknown condition '" + condition + "'", condition, itr.second);
                 }
             }
         }
@@ -152,7 +175,8 @@ class TomlCheckerRoot {
     bool m_checked = false;
 
   public:
-    TomlCheckerRoot(const TomlBasicValue &root) : m_root(root) {}
+    explicit TomlCheckerRoot(const TomlBasicValue &root) : m_root(root) {
+    }
     TomlCheckerRoot(const TomlCheckerRoot &) = delete;
     TomlCheckerRoot(TomlCheckerRoot &&) = delete;
 
@@ -175,7 +199,7 @@ class TomlCheckerRoot {
         if (check_root) {
             for (const auto &itr : m_root.as_table()) {
                 if (!m_visisted.contains(itr.first)) {
-                    throw std::runtime_error(format_key_error("Unknown key '" + itr.first + "'", itr.first, itr.second));
+                    throw_key_error("Unknown key '" + itr.first + "'", itr.first, itr.second);
                 }
             }
         }
@@ -185,7 +209,7 @@ class TomlCheckerRoot {
     }
 };
 
-Project::Project(const Project *parent, const std::string &path, bool build) {
+Project::Project(const Project *parent, const std::string &path, bool build) : parent(parent) {
     const auto toml_path = fs::path(path) / "cmake.toml";
     if (!fs::exists(toml_path)) {
         throw std::runtime_error("File not found '" + toml_path.string() + "'");
@@ -203,7 +227,7 @@ Project::Project(const Project *parent, const std::string &path, bool build) {
         cmake.required("version", cmake_version);
 
         if (cmake.contains("bin-dir")) {
-            throw std::runtime_error("bin-dir has been renamed to build-dir");
+            throw_key_error("bin-dir has been renamed to build-dir", "bin-dir", cmake.find("bin-dir"));
         }
 
         cmake.optional("build-dir", build_dir);
@@ -241,11 +265,22 @@ Project::Project(const Project *parent, const std::string &path, bool build) {
         conditions["bsd"] = R"cmake(CMAKE_SYSTEM_NAME MATCHES "BSD")cmake";
         conditions["linux"] = conditions["lunix"] = R"cmake(CMAKE_SYSTEM_NAME MATCHES "Linux")cmake";
         conditions["gcc"] = R"cmake(CMAKE_CXX_COMPILER_ID STREQUAL "GNU" OR CMAKE_C_COMPILER_ID STREQUAL "GNU")cmake";
-        conditions["clang"] = R"cmake(CMAKE_CXX_COMPILER_ID MATCHES "Clang" OR CMAKE_C_COMPILER_ID MATCHES "Clang")cmake";
         conditions["msvc"] = R"cmake(MSVC)cmake";
+        conditions["clang"] =
+            R"cmake((CMAKE_CXX_COMPILER_ID MATCHES "Clang" AND NOT CMAKE_CXX_COMPILER_FRONTEND_VARIANT MATCHES "^MSVC$") OR (CMAKE_C_COMPILER_ID MATCHES "Clang" AND NOT CMAKE_C_COMPILER_FRONTEND_VARIANT MATCHES "^MSVC$"))cmake";
+        conditions["clang-cl"] =
+            R"cmake((CMAKE_CXX_COMPILER_ID MATCHES "Clang" AND CMAKE_CXX_COMPILER_FRONTEND_VARIANT MATCHES "^MSVC$") OR (CMAKE_C_COMPILER_ID MATCHES "Clang" AND CMAKE_C_COMPILER_FRONTEND_VARIANT MATCHES "^MSVC$"))cmake";
+        conditions["clang-any"] = R"cmake(CMAKE_CXX_COMPILER_ID MATCHES "Clang" OR CMAKE_C_COMPILER_ID MATCHES "Clang")cmake";
         conditions["root"] = R"cmake(CMKR_ROOT_PROJECT)cmake";
         conditions["x64"] = R"cmake(CMAKE_SIZEOF_VOID_P EQUAL 8)cmake";
         conditions["x32"] = R"cmake(CMAKE_SIZEOF_VOID_P EQUAL 4)cmake";
+        conditions["android"] = R"cmake(ANDROID)cmake";
+        conditions["apple"] = R"cmake(APPLE)cmake";
+        conditions["bsd"] = R"cmake(BSD)cmake";
+        conditions["cygwin"] = R"cmake(CYGWIN)cmake";
+        conditions["ios"] = R"cmake(IOS)cmake";
+        conditions["xcode"] = R"cmake(XCODE)cmake";
+        conditions["wince"] = R"cmake(WINCE)cmake";
     } else {
         conditions = parent->conditions;
         templates = parent->templates;
@@ -254,6 +289,9 @@ Project::Project(const Project *parent, const std::string &path, bool build) {
     if (checker.contains("conditions")) {
         auto conds = toml::find<decltype(conditions)>(toml, "conditions");
         for (const auto &cond : conds) {
+            if (!is_condition_name(cond.first)) {
+                throw_key_error("Invalid condition name '" + cond.first + "'", cond.first, toml::find(toml::find(toml, "conditions"), cond.first));
+            }
             conditions[cond.first] = cond.second;
         }
     }
@@ -263,12 +301,33 @@ Project::Project(const Project *parent, const std::string &path, bool build) {
         project.required("name", project_name);
         project.optional("version", project_version);
         project.optional("description", project_description);
+
+        // The implicit default is ["C", "CXX"], so make sure this list isn't
+        // empty or projects without languages explicitly defined will error.
+        project_languages[""] = {"C", "CXX"};
+
         project.optional("languages", project_languages);
+        project.optional("allow-unknown-languages", project_allow_unknown_languages);
         project.optional("cmake-before", cmake_before);
         project.optional("cmake-after", cmake_after);
         project.optional("include-before", include_before);
         project.optional("include-after", include_after);
         project.optional("subdirs", project_subdirs);
+
+        std::string msvc_runtime;
+        project.optional("msvc-runtime", msvc_runtime);
+        if (!msvc_runtime.empty()) {
+            project_msvc_runtime = parse_msvcRuntimeType(msvc_runtime);
+            if (project_msvc_runtime == msvc_last) {
+                std::string error = "Unknown runtime '" + msvc_runtime + "'\n";
+                error += "Available types:\n";
+                for (std::string type_name : msvcRuntimeTypeNames) {
+                    error += "  - " + type_name + "\n";
+                }
+                error.pop_back(); // Remove last newline
+                throw_key_error(error, msvc_runtime, project.find("msvc-runtime"));
+            }
+        }
     }
 
     if (checker.contains("subdir")) {
@@ -288,36 +347,65 @@ Project::Project(const Project *parent, const std::string &path, bool build) {
         }
     }
 
-    if (checker.contains("settings")) {
+    if (checker.contains("variables")) {
         using set_map = tsl::ordered_map<std::string, TomlBasicValue>;
-        const auto &sets = toml::find<set_map>(toml, "settings");
+        auto vars = toml::find<set_map>(toml, "variables");
-        for (const auto &itr : sets) {
+        if (checker.contains("settings")) {
-            Setting s;
+            print_key_warning("[settings] has been renamed to [variables]", "settings", toml.at("settings"));
+            const auto &sets = toml::find<set_map>(toml, "settings");
+            for (const auto &itr : sets) {
+                if (!vars.insert(itr).second) {
+                    throw_key_error("Key '" + itr.first + "' shadows existing variable", itr.first, itr.second);
+                }
+            }
+        }
+
+        for (const auto &itr : vars) {
+            Variable s;
             s.name = itr.first;
             const auto &value = itr.second;
             if (value.is_boolean()) {
-                s.val = value.as_boolean();
+                s.value = value.as_boolean();
             } else if (value.is_string()) {
-                s.val = value.as_string();
+                s.value = value.as_string();
             } else {
                 auto &setting = checker.create(value);
-                setting.optional("comment", s.comment);
+                setting.optional("help", s.help);
                 if (setting.contains("value")) {
                     const auto &v = setting.find("value");
                     if (v.is_boolean()) {
-                        s.val = v.as_boolean();
+                        s.value = v.as_boolean();
                     } else {
-                        s.val = v.as_string();
+                        s.value = v.as_string();
                     }
                 }
                 setting.optional("cache", s.cache);
                 setting.optional("force", s.force);
             }
-            settings.push_back(s);
+            variables.push_back(s);
         }
     }
 
     if (checker.contains("options")) {
+        auto normalize = [](const std::string &name) {
+            std::string normalized;
+            for (char ch : name) {
+                if (ch == '_') {
+                    normalized += '-';
+                } else if (ch >= 'A' && ch <= 'Z') {
+                    ch += ('a' - 'A');
+                    normalized += ch;
+                } else if (ch == '-' || (ch >= '0' && ch <= '9') || (ch >= 'a' && ch <= 'z')) {
+                    normalized += ch;
+                } else {
+                    // Ignore all other characters
+                }
+            }
+            return normalized;
+        };
+        auto nproject_prefix = normalize(project_name);
+        nproject_prefix += '-';
+
         using opts_map = tsl::ordered_map<std::string, TomlBasicValue>;
         const auto &opts = toml::find<opts_map>(toml, "options");
         for (const auto &itr : opts) {
@@ -325,13 +413,52 @@ Project::Project(const Project *parent, const std::string &path, bool build) {
             o.name = itr.first;
             const auto &value = itr.second;
             if (value.is_boolean()) {
-                o.val = value.as_boolean();
+                o.value = value.as_boolean();
-            } else {
+            } else if (value.is_string()) {
+                auto str = std::string(value.as_string());
+                if (str == "root") {
+                    o.value = std::string("${CMKR_ROOT_PROJECT}");
+                } else {
+                    throw_key_error("Unsupported option value '" + str + "'", str, value);
+                }
+            } else if (value.is_table()) {
                 auto &option = checker.create(value);
-                option.optional("comment", o.comment);
+                option.optional("help", o.help);
-                option.optional("value", o.val);
+                if (option.contains("value")) {
+                    const auto &ovalue = option.find("value");
+                    if (ovalue.is_boolean()) {
+                        o.value = ovalue.as_boolean();
+                    } else if (ovalue.is_string()) {
+                        auto str = std::string(ovalue.as_string());
+                        if (str == "root") {
+                            o.value = std::string("${CMKR_ROOT_PROJECT}");
+                        } else {
+                            throw_key_error("Unsupported option value '" + str + "'", str, value);
+                        }
+                    } else {
+                        throw_key_error(toml::concat_to_string("Unsupported value type: ", ovalue.type()), "value", value);
+                    }
+                }
+            } else {
+                throw_key_error(toml::concat_to_string("Unsupported value type: ", itr.second.type()), itr.first, itr.second);
             }
             options.push_back(o);
+
+            // Add a condition matching the option name
+            if (!conditions.emplace(o.name, o.name).second) {
+                print_key_warning("Option '" + o.name + "' would create a condition '" + o.name + "' that already exists", o.name, value);
+            }
+
+            // Add an implicit condition for the option
+            auto ncondition = normalize(o.name);
+            if (ncondition.find(nproject_prefix) == 0) {
+                ncondition = ncondition.substr(nproject_prefix.size());
+            }
+            if (!ncondition.empty() && ncondition != o.name) {
+                if (!conditions.emplace(ncondition, o.name).second) {
+                    print_key_warning("Option '" + o.name + "' would create a condition '" + ncondition + "' that already exists", o.name, value);
+                }
+            }
         }
     }
 
@@ -368,6 +495,15 @@ Project::Project(const Project *parent, const std::string &path, bool build) {
             c.optional("cmake-after", content.cmake_after);
             c.optional("include-before", content.include_before);
             c.optional("include-after", content.include_after);
+            c.optional("system", content.system);
+
+            // Check if the minimum version requirement is satisfied (CMake 3.25)
+            if (c.contains("system") && !this->cmake_minimum_version(3, 25)) {
+                throw_key_error("The system argument is only supported on CMake version 3.25 and above.\nSet the CMake version in cmake.toml:\n"
+                                "[cmake]\n"
+                                "version = \"3.25\"\n",
+                                "system", "");
+            }
 
             for (const auto &argItr : itr.second.as_table()) {
                 std::string value;
@@ -413,17 +549,30 @@ Project::Project(const Project *parent, const std::string &path, bool build) {
                     key = "URL";
                 } else if (hash_algorithms.contains(key)) {
                     std::string algo;
-                    for (auto c : key) {
+                    for (auto ch : key) {
-                        algo.push_back(std::toupper(c));
+                        if (ch >= 'a' && ch <= 'z') {
+                            ch -= ('a' - 'A');
+                        }
+                        algo.push_back(ch);
                     }
                     key = "URL_HASH";
+                    if (value.empty()) {
+                        throw_key_error("Empty hash value", argItr.first, argItr.second);
+                    }
+                    for (char c : value) {
+                        if (!std::isxdigit(c)) {
+                            throw_key_error("Hash value must be a hex string", argItr.first, argItr.second);
+                        }
+                    }
                     value = algo + "=" + value;
                 } else if (key == "hash") {
                     key = "URL_HASH";
+                } else if (key == "subdir") {
+                    key = "SOURCE_SUBDIR";
                 } else if (is_cmake_arg(key)) {
                     // allow passthrough of ExternalProject options
                 } else if (!c.visisted(key)) {
-                    throw std::runtime_error(format_key_error("Unknown key '" + argItr.first + "'", argItr.first, argItr.second));
+                    throw_key_error("Unknown key '" + argItr.first + "'", argItr.first, argItr.second);
                 }
 
                 // Make sure not to emit keys like "condition" in the FetchContent call
@@ -438,7 +587,7 @@ Project::Project(const Project *parent, const std::string &path, bool build) {
     }
 
     if (checker.contains("bin")) {
-        throw std::runtime_error("[[bin]] has been renamed to [[target]]");
+        throw_key_error("[[bin]] has been renamed to [target.<name>]", "", toml.at("bin"));
     }
 
     auto parse_target = [&](const std::string &name, TomlChecker &t, bool isTemplate) {
@@ -477,12 +626,21 @@ Project::Project(const Project *parent, const std::string &path, bool build) {
                 }
             }
             error.pop_back(); // Remove last newline
-            throw std::runtime_error(format_key_error(error, target.type_name, t.find("type")));
+            throw_key_error(error, target.type_name, t.find("type"));
         }
 
-        t.optional("headers", target.headers);
         t.optional("sources", target.sources);
 
+        // Merge the headers into the sources
+        ConditionVector headers;
+        t.optional("headers", headers);
+        for (const auto &itr : headers) {
+            auto &dest = target.sources[itr.first];
+            for (const auto &jtr : itr.second) {
+                dest.push_back(jtr);
+            }
+        }
+
         t.optional("compile-definitions", target.compile_definitions);
         t.optional("private-compile-definitions", target.private_compile_definitions);
 
@@ -501,16 +659,71 @@ Project::Project(const Project *parent, const std::string &path, bool build) {
         t.optional("link-libraries", target.link_libraries);
         t.optional("private-link-libraries", target.private_link_libraries);
 
+        // Add support for relative paths for (private-)link-libraries
+        const auto fix_relative_paths = [&name, &path](ConditionVector &libraries, const char *key) {
+            for (const auto &library_entries : libraries) {
+                for (auto &library : libraries[library_entries.first]) {
+                    // Skip processing paths with potential CMake macros in them (this check isn't perfect)
+                    // https://cmake.org/cmake/help/latest/manual/cmake-language.7.html#variable-references
+                    if ((library.find("${") != std::string::npos || library.find("$ENV{") != std::string::npos ||
+                         library.find("$CACHE{") != std::string::npos) &&
+                        library.find('}') != std::string::npos) {
+                        continue;
+                    }
+
+                    auto library_path = fs::path(path) / library;
+                    if (fs::exists(library_path)) {
+                        if (!fs::is_directory(library_path)) {
+                            // If the file path is relative (and not a directory), prepend ${CMAKE_CURRENT_SOURCE_DIR}
+                            library.insert(0, "${CMAKE_CURRENT_SOURCE_DIR}/");
+                        }
+                    } else if (library.find_first_of(R"(\/)") != std::string::npos) {
+                        // Error if the path contains a directory separator and the file doesn't exist
+                        throw std::runtime_error("Attempted to link against a library file that doesn't exist for target \"" + name + "\" in \"" +
+                                                 key + "\": " + library);
+                    } else {
+                        // NOTE: We cannot check if system libraries exist, so we leave them as-is
+                    }
+                }
+            }
+        };
+        fix_relative_paths(target.link_libraries, "link-libraries");
+        fix_relative_paths(target.private_link_libraries, "private-link-libraries");
+
         t.optional("link-options", target.link_options);
         t.optional("private-link-options", target.private_link_options);
 
         t.optional("precompile-headers", target.precompile_headers);
         t.optional("private-precompile-headers", target.private_precompile_headers);
 
-        if (!target.headers.empty()) {
+        t.optional("dependencies", target.dependencies);
-            auto &sources = target.sources.nth(0).value();
+
-            const auto &headers = target.headers.nth(0)->second;
+        Condition<std::string> msvc_runtime;
-            sources.insert(sources.end(), headers.begin(), headers.end());
+        t.optional("msvc-runtime", msvc_runtime);
+        for (const auto &cond_itr : msvc_runtime) {
+            switch (parse_msvcRuntimeType(cond_itr.second)) {
+            case msvc_dynamic:
+                target.properties[cond_itr.first]["MSVC_RUNTIME_LIBRARY"] = "MultiThreaded$<$<CONFIG:Debug>:Debug>DLL";
+                break;
+            case msvc_static:
+                target.properties[cond_itr.first]["MSVC_RUNTIME_LIBRARY"] = "MultiThreaded$<$<CONFIG:Debug>:Debug>";
+                break;
+            default: {
+                std::string error = "Unknown runtime '" + cond_itr.second + "'\n";
+                error += "Available types:\n";
+                for (std::string type_name : msvcRuntimeTypeNames) {
+                    error += "  - " + type_name + "\n";
+                }
+                error.pop_back(); // Remove last newline
+                const TomlBasicValue *report;
+                if (cond_itr.first.empty()) {
+                    report = &t.find("msvc-runtime");
+                } else {
+                    report = &t.find(cond_itr.first).as_table().find("msvc-runtime").value();
+                }
+                throw_key_error(error, cond_itr.second, *report);
+            }
+            }
         }
 
         t.optional("condition", target.condition);
@@ -527,6 +740,8 @@ Project::Project(const Project *parent, const std::string &path, bool build) {
                         property_list += list_val.as_string();
                     }
                     target.properties[condition][k] = property_list;
+                } else if (v.is_integer()) {
+                    target.properties[condition][k] = std::to_string(v.as_integer());
                 } else if (v.is_boolean()) {
                     target.properties[condition][k] = v.as_boolean() ? "ON" : "OFF";
                 } else {
@@ -564,13 +779,13 @@ Project::Project(const Project *parent, const std::string &path, bool build) {
 
             for (const auto &type_name : targetTypeNames) {
                 if (name == type_name) {
-                    throw std::runtime_error(format_key_error("Reserved template name '" + name + "'", name, itr.second));
+                    throw_key_error("Reserved template name '" + name + "'", name, itr.second);
                 }
             }
 
             for (const auto &tmplate : templates) {
                 if (name == tmplate.outline.name) {
-                    throw std::runtime_error(format_key_error("Template '" + name + "' already defined", name, itr.second));
+                    throw_key_error("Template '" + name + "' already defined", name, itr.second);
                 }
             }
 
@@ -578,7 +793,9 @@ Project::Project(const Project *parent, const std::string &path, bool build) {
             tmplate.outline = parse_target(name, t, true);
 
             t.optional("add-function", tmplate.add_function);
+            t.optional("add-arguments", tmplate.add_arguments);
             t.optional("pass-sources-to-add-function", tmplate.pass_sources_to_add_function);
+            t.optional("pass-sources", tmplate.pass_sources_to_add_function);
 
             templates.push_back(tmplate);
         }
@@ -619,6 +836,7 @@ Project::Project(const Project *parent, const std::string &path, bool build) {
             i.optional("configs", inst.configs);
             i.required("destination", inst.destination);
             i.optional("component", inst.component);
+            i.optional("optional", inst.optional);
             installs.push_back(inst);
         }
     }
@@ -627,6 +845,7 @@ Project::Project(const Project *parent, const std::string &path, bool build) {
         auto &v = checker.create(toml, "vcpkg");
         v.optional("url", vcpkg.url);
         v.optional("version", vcpkg.version);
+
         for (const auto &p : v.find("packages").as_array()) {
             Vcpkg::Package package;
             const auto &package_str = p.as_string().str;
@@ -640,18 +859,73 @@ Project::Project(const Project *parent, const std::string &path, bool build) {
                 std::istringstream feature_stream{features};
                 std::string feature;
                 while (std::getline(feature_stream, feature, ',')) {
-                    package.features.emplace_back(feature);
+                    // Disable default features with package-name[core,feature1]
+                    if (feature == "core") {
+                        package.default_features = false;
+                    } else {
+                        package.features.emplace_back(feature);
+                    }
                 }
             } else {
-                throw std::runtime_error("Invalid vcpkg package '" + package_str + "'");
+                throw_key_error("Invalid package name '" + package_str + "'", "packages", p);
             }
             vcpkg.packages.emplace_back(std::move(package));
         }
+
+        if (v.contains("overlay")) {
+            std::string overlay;
+            v.optional("overlay", overlay);
+            vcpkg.overlay_triplets = vcpkg.overlay_ports = {overlay};
+            if (v.contains("overlay-ports")) {
+                throw_key_error("[vcpkg].overlay was already specified", "overlay-ports", v.find("overlay-ports"));
+            }
+            if (v.contains("overlay-triplets")) {
+                throw_key_error("[vcpkg].overlay was already specified", "overlay-triplets", v.find("overlay-triplets"));
+            }
+        } else {
+            v.optional("overlay-ports", vcpkg.overlay_ports);
+            v.optional("overlay-triplets", vcpkg.overlay_triplets);
+        }
     }
 
     checker.check(conditions, true);
 }
 
+const Project *Project::root() const {
+    auto root = this;
+    while (root->parent != nullptr)
+        root = root->parent;
+    return root;
+}
+
+bool Project::cmake_minimum_version(int major, int minor) const {
+    // NOTE: this code is like pulling teeth, sorry
+    auto root_version = root()->cmake_version;
+    auto range_index = root_version.find("...");
+    if (range_index != std::string::npos) {
+        root_version.resize(range_index);
+    }
+
+    auto period_index = root_version.find('.');
+    auto root_major = atoi(root_version.substr(0, period_index).c_str());
+    int root_minor = 0;
+    if (period_index != std::string::npos) {
+        auto end_index = root_version.find('.', period_index + 1);
+        root_minor = atoi(root_version.substr(period_index + 1, end_index).c_str());
+    }
+
+    return std::tie(root_major, root_minor) >= std::tie(major, minor);
+}
+
+bool Project::is_condition_name(const std::string &name) {
+    for (auto ch : name) {
+        if (!std::isalnum(ch) && ch != '-' && ch != '_') {
+            return false;
+        }
+    }
+    return true;
+}
+
 bool is_root_path(const std::string &path) {
     const auto toml_path = fs::path(path) / "cmake.toml";
     if (!fs::exists(toml_path)) {

tests/.gitignore

@@ -1,3 +1,4 @@
 # These will be generated by cmkr, so no point in tracking them
 **/CMakeLists.txt
 **/cmkr.cmake
+**/vcpkg.json

tests/CMakeLists.txt

@@ -14,7 +14,7 @@ add_test(
 	WORKING_DIRECTORY
 		"${CMAKE_CURRENT_LIST_DIR}/basic"
 	COMMAND
-		$<TARGET_FILE:cmkr>
+		"$<TARGET_FILE:cmkr>"
 		build
 )
 
@@ -24,7 +24,7 @@ add_test(
 	WORKING_DIRECTORY
 		"${CMAKE_CURRENT_LIST_DIR}/interface"
 	COMMAND
-		$<TARGET_FILE:cmkr>
+		"$<TARGET_FILE:cmkr>"
 		build
 )
 
@@ -34,7 +34,7 @@ add_test(
 	WORKING_DIRECTORY
 		"${CMAKE_CURRENT_LIST_DIR}/fetch-content"
 	COMMAND
-		$<TARGET_FILE:cmkr>
+		"$<TARGET_FILE:cmkr>"
 		build
 )
 
@@ -44,7 +44,7 @@ add_test(
 	WORKING_DIRECTORY
 		"${CMAKE_CURRENT_LIST_DIR}/conditions"
 	COMMAND
-		$<TARGET_FILE:cmkr>
+		"$<TARGET_FILE:cmkr>"
 		build
 )
 
@@ -54,7 +54,7 @@ add_test(
 	WORKING_DIRECTORY
 		"${CMAKE_CURRENT_LIST_DIR}/vcpkg"
 	COMMAND
-		$<TARGET_FILE:cmkr>
+		"$<TARGET_FILE:cmkr>"
 		build
 )
 
@@ -64,7 +64,7 @@ add_test(
 	WORKING_DIRECTORY
 		"${CMAKE_CURRENT_LIST_DIR}/cxx-standard"
 	COMMAND
-		$<TARGET_FILE:cmkr>
+		"$<TARGET_FILE:cmkr>"
 		build
 )
 
@@ -74,7 +74,7 @@ add_test(
 	WORKING_DIRECTORY
 		"${CMAKE_CURRENT_LIST_DIR}/globbing"
 	COMMAND
-		$<TARGET_FILE:cmkr>
+		"$<TARGET_FILE:cmkr>"
 		build
 )
 
@@ -84,7 +84,50 @@ add_test(
 	WORKING_DIRECTORY
 		"${CMAKE_CURRENT_LIST_DIR}/templates"
 	COMMAND
-		$<TARGET_FILE:cmkr>
+		"$<TARGET_FILE:cmkr>"
 		build
 )
 
+if(MSVC) # msvc
+	add_test(
+		NAME
+			msvc-runtime
+		WORKING_DIRECTORY
+			"${CMAKE_CURRENT_LIST_DIR}/msvc-runtime"
+		COMMAND
+			"$<TARGET_FILE:cmkr>"
+			build
+	)
+
+endif()
+add_test(
+	NAME
+		compile-options
+	WORKING_DIRECTORY
+		"${CMAKE_CURRENT_LIST_DIR}/compile-options"
+	COMMAND
+		"$<TARGET_FILE:cmkr>"
+		build
+)
+
+if(WIN32) # windows
+	add_test(
+		NAME
+			relative-paths
+		WORKING_DIRECTORY
+			"${CMAKE_CURRENT_LIST_DIR}/relative-paths"
+		COMMAND
+			"$<TARGET_FILE:cmkr>"
+			build
+	)
+
+endif()
+add_test(
+	NAME
+		objective-c
+	WORKING_DIRECTORY
+		"${CMAKE_CURRENT_LIST_DIR}/objective-c"
+	COMMAND
+		"$<TARGET_FILE:cmkr>"
+		build
+)

tests/cmake.toml

@@ -45,3 +45,29 @@ name = "templates"
 working-directory = "templates"
 command = "$<TARGET_FILE:cmkr>"
 arguments = ["build"]
+
+[[test]]
+condition = "msvc"
+name = "msvc-runtime"
+working-directory = "msvc-runtime"
+command = "$<TARGET_FILE:cmkr>"
+arguments = ["build"]
+
+[[test]]
+name = "compile-options"
+working-directory = "compile-options"
+command = "$<TARGET_FILE:cmkr>"
+arguments = ["build"]
+
+[[test]]
+condition = "windows"
+name = "relative-paths"
+working-directory = "relative-paths"
+command = "$<TARGET_FILE:cmkr>"
+arguments = ["build"]
+
+[[test]]
+name = "objective-c"
+working-directory = "objective-c"
+command = "$<TARGET_FILE:cmkr>"
+arguments = ["build"]

tests/compile-options/cmake.toml

@@ -0,0 +1,18 @@
+# Example project that sets compiler flags and preprocessor defines for various platforms.
+
+[project]
+name = "compile-options"
+description = "Compiler flags"
+
+[target.hello]
+type = "executable"
+sources = ["src/main.cpp"]
+msvc.compile-options = ["/W2"]
+msvc.compile-definitions = ["PLATFORM=\"msvc\""]
+gcc.compile-options = ["-Wall"]
+gcc.compile-definitions = ["PLATFORM=\"gcc\""]
+clang.compile-options = ["-Wall"]
+clang.compile-definitions = ["PLATFORM=\"clang\""]
+
+# The `hello` target uses [conditions](/cmake-toml#conditions) to set different compiler flags and definitions depending on the platform. See the [targets](/cmake-toml/#targets) documentation for other things you can set.
+# _Note_: In general you only want to specify flags _required_ to compile your code without errors.

tests/compile-options/src/main.cpp

@@ -0,0 +1,5 @@
+#include <cstdio>
+
+int main() {
+    puts("Hello from cmkr!");
+}

tests/conditions/cmake.toml

@@ -2,6 +2,9 @@
 name = "conditions"
 cmake-after = "set(CUSTOM ON)"
 
+[options]
+CONDITIONS_BUILD_TESTS = "root"
+
 [conditions]
 custom = "CUSTOM"
 
@@ -15,6 +18,8 @@ macos.cmake-after = "message(STATUS macos-after)"
 linux.cmake-after = "message(STATUS linux-after)"
 unix.cmake-after = "message(STATUS unix-after)"
 custom.cmake-after = "message(STATUS custom-after)"
+build-tests.cmake-after = "message(STATUS build-tests)"
+"CONDITIONS_BUILD_TESTS AND $<linux>".cmake-after = "message(STATUS linux-tests)"
 
 [target.example.properties]
 AUTOMOC = false

tests/conditions/src/main.cpp

@@ -1 +1,2 @@
-int main() { }
+int main() {
+}

tests/conditions/src/windows_specific.cpp

@@ -1,3 +1,4 @@
 #include <Windows.h>
 
-void foo() { }
+void foo() {
+}

tests/cxx-standard/src/main.cpp

@@ -1,8 +1,7 @@
 #include <cstdio>
 #include <tuple>
 
-int main()
+int main() {
-{
     auto tpl = std::make_tuple(1, 2);
     printf("Hello from C++11 %d\n", std::get<0>(tpl));
 }

tests/fetch-content/cmake.toml

@@ -4,8 +4,9 @@
 name = "fetch-content"
 description = "Fetching from git"
 
-[fetch-content]
+[fetch-content.fmt]
-fmt = { git = "https://github.com/fmtlib/fmt", tag = "7.1.3" }
+git = "https://github.com/fmtlib/fmt"
+tag = "7.1.3"
 
 [target.example]
 type = "executable"

tests/fetch-content/src/main.cpp

@@ -1,6 +1,5 @@
 #include <fmt/core.h>
 
-int main()
+int main() {
-{
     fmt::print("Hello, world!\n");
 }

tests/globbing/mylib/include/mylib/mylib.hpp

@@ -2,7 +2,6 @@
 
 #include <string>
 
-namespace mylib
+namespace mylib {
-{
 std::string message();
-}
+} // namespace mylib

tests/globbing/mylib/src/mylib/mylib.cpp

@@ -1,6 +1,5 @@
 #include <mylib/mylib.hpp>
 
-std::string mylib::message()
+std::string mylib::message() {
-{
     return "cmkr is awesome!";
 }

tests/interface/include/mylib/mylib.hpp

@@ -1,4 +1,5 @@
-namespace mylib
+namespace mylib {
-{
+static const char *version() {
-static const char* version() { return "v1.0"; }
+    return "v1.0";
+}
 } // namespace mylib

tests/interface/src/main.cpp

@@ -2,7 +2,6 @@
 
 #include "mylib/mylib.hpp"
 
-int main()
+int main() {
-{
+    printf("mylib version: %s\n", mylib::version());
-    printf("mylib version: %s\n", mylib::version())
 }

tests/msvc-runtime/cmake.toml

@@ -0,0 +1,15 @@
+[project]
+name = "msvc-runtime"
+description = "Static MSVC runtime"
+msvc-runtime = "static"
+
+# This target will compile with a static runtime
+[target.static-runtime]
+type = "executable"
+sources = ["src/main.cpp"]
+
+# This target overrides the [project].msvc-runtime
+[target.dynamic-runtime]
+type = "executable"
+sources = ["src/main.cpp"]
+msvc-runtime = "dynamic"

tests/msvc-runtime/src/main.cpp

@@ -0,0 +1,5 @@
+#include <cstdio>
+
+int main() {
+    puts("Hello from cmkr(msvc-static)!");
+}

tests/objective-c/cmake.toml

@@ -0,0 +1,13 @@
+# Add Objective-C sources on Apple platforms:
+
+[project]
+name = "objective-c"
+description = "Objective-C"
+languages = ["C"]
+apple.languages = ["OBJC"]
+
+[target.hello]
+type = "executable"
+sources = ["src/main.c"]
+apple.sources = ["src/apple.m"]
+apple.link-libraries = ["$<LINK_LIBRARY:FRAMEWORK,Foundation>"]

tests/objective-c/src/apple.m

@@ -0,0 +1,7 @@
+#import <Foundation/Foundation.h>
+
+void platform_specific() {
+  NSFileHandle *stdout = [NSFileHandle fileHandleWithStandardOutput];
+  NSString *message = @"Hello from Objective-C!\n";
+  [stdout writeData:[message dataUsingEncoding:NSUTF8StringEncoding] error:nil];
+}

tests/objective-c/src/main.c

@@ -0,0 +1,14 @@
+#include <stdio.h>
+
+#ifdef __APPLE__
+void platform_specific();
+#else
+void platform_specific() {
+    puts("This is not an Apple platform.");
+}
+#endif
+
+int main() {
+    platform_specific();
+    return 0;
+}

tests/relative-paths/cmake.toml

@@ -0,0 +1,11 @@
+[project]
+name = "relative-paths"
+
+[target.test-library]
+type = "static"
+sources = ["src/library-code.cpp"]
+
+[target.example]
+type = "executable"
+sources = ["src/main.cpp"]
+windows.link-libraries = ["libs/test-library-x64-Release.lib"]

tests/relative-paths/src/library-code.cpp

@@ -0,0 +1,6 @@
+// Created by Anthony Printup on 9/18/2023.
+#include <cstdio>
+
+extern "C" void library_function() {
+    std::puts("Hello from library_function!");
+}

tests/relative-paths/src/main.cpp

@@ -0,0 +1,12 @@
+// Created by Anthony Printup on 9/18/2023.
+#include <cstdio>
+
+#ifdef WIN32
+extern "C" void library_function();
+#endif
+int main() {
+    puts("Hello from cmkr(relative-paths)!");
+#ifdef WIN32
+    library_function();
+#endif
+}

tests/templates/cmake.toml

@@ -8,11 +8,11 @@ description = "Target templates"
 type = "executable"
 sources = ["src/templates.cpp"]
 compile-definitions = ["IS_APP"]
-
 # Unlike interface targets you can also inherit properties
-[template.app.properties]
+properties = {
-CXX_STANDARD = "11"
+    CXX_STANDARD = "11",
-CXX_STANDARD_REQUIRED = true
+    CXX_STANDARD_REQUIRED = true,
+}
 
 [target.app-a]
 type = "app"

tests/vcpkg/cmake.toml

@@ -1,17 +1,16 @@
-# Downloads [fmt v7.1.3](https://fmt.dev/7.1.3/) using [vcpkg](https://vcpkg.io/) and links an `example` target to it:
+# Downloads [fmt v7.1.3](https://fmt.dev/7.1.3/) using [vcpkg](https://github.com/microsoft/vcpkg) and links an `example` target to it:
 
 [project]
 name = "vcpkg"
 description = "Dependencies from vcpkg"
 
 # See https://github.com/microsoft/vcpkg/releases for vcpkg versions
-# See https://vcpkg.io/en/packages.html for available packages
+# See https://vcpkg.io/en/packages or https://vcpkg.link for available packages
 [vcpkg]
-version = "2021.05.12"
+version = "2024.11.16"
 packages = ["fmt"]
 
-[find-package]
+[find-package.fmt]
-fmt = {}
 
 [target.example]
 type = "executable"

tests/vcpkg/src/main.cpp

@@ -1,6 +1,5 @@
 #include <fmt/core.h>
 
-int main()
+int main() {
-{
     fmt::print("Hello, world!\n");
 }

tests/vcpkg/vcpkg.json

@@ -1,11 +0,0 @@
-{
-  "$cmkr": "This file is automatically generated from cmake.toml - DO NOT EDIT",
-  "$cmkr-url": "https://github.com/build-cpp/cmkr",
-  "$schema": "https://raw.githubusercontent.com/microsoft/vcpkg/master/scripts/vcpkg.schema.json",
-  "dependencies": [
-    "fmt"
-  ],
-  "description": "Dependencies from vcpkg",
-  "name": "vcpkg",
-  "version-string": ""
-}

third_party/.clang-format

@@ -0,0 +1,3 @@
+# Disable clang-format in this folder
+DisableFormat: true
+SortIncludes: Never

third_party/CMakeLists.txt

@@ -11,12 +11,9 @@ target_compile_definitions(ordered_map INTERFACE NOMINMAX)
 
 # https://github.com/ToruNiina/toml11 (MIT)
 add_library(toml11 INTERFACE)
-target_include_directories(toml11 INTERFACE toml11-3.6.0)
+target_include_directories(toml11 INTERFACE toml11-3.8.1)
+target_compile_definitions(toml11 INTERFACE TOML11_USE_UNRELEASED_TOML_FEATURES)
 
 # https://github.com/mpark/variant (BSL-1.0)
 add_library(mpark_variant INTERFACE)
 target_include_directories(mpark_variant INTERFACE variant-1.4.0/include)
-
-# https://github.com/nlohmann/json (MIT)
-add_library(nlohmann_json INTERFACE)
-target_include_directories(nlohmann_json INTERFACE nlohmann-3.9.1/include)

third_party/nlohmann-3.9.1/LICENSE

@@ -1,21 +0,0 @@
-MIT License 
-
-Copyright (c) 2013-2021 Niels Lohmann
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.

third_party/toml11-3.8.1/toml.hpp

@@ -25,21 +25,14 @@
 #ifndef TOML_FOR_MODERN_CPP
 #define TOML_FOR_MODERN_CPP
 
-#ifndef __cplusplus
-#    error "__cplusplus is not defined"
-#endif
-
-#if __cplusplus < 201103L && _MSC_VER < 1900
-#    error "toml11 requires C++11 or later."
-#endif
-
 #define TOML11_VERSION_MAJOR 3
-#define TOML11_VERSION_MINOR 5
+#define TOML11_VERSION_MINOR 8
-#define TOML11_VERSION_PATCH 0
+#define TOML11_VERSION_PATCH 1
 
 #include "toml/parser.hpp"
 #include "toml/literal.hpp"
 #include "toml/serializer.hpp"
 #include "toml/get.hpp"
+#include "toml/macros.hpp"
 
 #endif// TOML_FOR_MODERN_CPP

third_party/toml11-3.8.1/toml/color.hpp

@@ -17,11 +17,41 @@ namespace color_ansi
 {
 namespace detail
 {
+
 inline int colorize_index()
 {
     static const int index = std::ios_base::xalloc();
     return index;
 }
+
+// Control color mode globally
+class color_mode
+{
+  public:
+    inline void enable()
+    {
+        should_color_ = true;
+    }
+    inline void disable()
+    {
+        should_color_ = false;
+    }
+
+    inline bool should_color() const
+    {
+        return should_color_;
+    }
+
+    static color_mode& status()
+    {
+        static color_mode status_;
+        return status_;
+    }
+
+  private:
+    bool should_color_ = false;
+};
+
 } // detail
 
 inline std::ostream& colorize(std::ostream& os)
@@ -55,6 +85,21 @@ inline std::ostream& cyan   (std::ostream& os)
 {if(os.iword(detail::colorize_index()) == 1) {os << "\033[36m";} return os;}
 inline std::ostream& white  (std::ostream& os)
 {if(os.iword(detail::colorize_index()) == 1) {os << "\033[37m";} return os;}
+
+inline void enable()
+{
+    return detail::color_mode::status().enable();
+}
+inline void disable()
+{
+    return detail::color_mode::status().disable();
+}
+
+inline bool should_color()
+{
+    return detail::color_mode::status().should_color();
+}
+
 } // color_ansi
 
 // ANSI escape sequence is the only and default colorization method currently

third_party/toml11-3.8.1/toml/combinator.hpp

@@ -29,7 +29,7 @@ namespace detail
 // to output character as an error message.
 inline std::string show_char(const char c)
 {
-    // It supress an error that occurs only in Debug mode of MSVC++ on Windows.
+    // It suppresses an error that occurs only in Debug mode of MSVC++ on Windows.
     // I'm not completely sure but they check the value of char to be in the
     // range [0, 256) and some of the COMPLETELY VALID utf-8 character sometimes
     // has negative value (if char has sign). So here it re-interprets c as
@@ -154,7 +154,7 @@ struct sequence<Head, Tail...>
     invoke(location& loc)
     {
         const auto first = loc.iter();
-        const auto rslt = Head::invoke(loc);
+        auto rslt = Head::invoke(loc);
         if(rslt.is_err())
         {
             loc.reset(first);

third_party/toml11-3.8.1/toml/comments.hpp

@@ -4,11 +4,18 @@
 #define TOML11_COMMENTS_HPP
 #include <initializer_list>
 #include <iterator>
+#include <stdexcept>
 #include <string>
 #include <type_traits>
 #include <utility>
 #include <vector>
 
+#ifdef TOML11_PRESERVE_COMMENTS_BY_DEFAULT
+#  define TOML11_DEFAULT_COMMENT_STRATEGY ::toml::preserve_comments
+#else
+#  define TOML11_DEFAULT_COMMENT_STRATEGY ::toml::discard_comments
+#endif
+
 // This file provides mainly two classes, `preserve_comments` and `discard_comments`.
 // Those two are a container that have the same interface as `std::vector<std::string>`
 // but bahaves in the opposite way. `preserve_comments` is just the same as
@@ -339,7 +346,7 @@ operator+(const empty_iterator<T, C>& lhs, typename empty_iterator<T, C>::differ
 //
 // Why this is chose as the default type is because the last version (2.x.y)
 // does not contain any comments in a value. To minimize the impact on the
-// efficiency, this is choosed as a default.
+// efficiency, this is chosen as a default.
 //
 // To reduce the memory footprint, later we can try empty base optimization (EBO).
 struct discard_comments
@@ -418,14 +425,14 @@ struct discard_comments
     // empty, so accessing through operator[], front/back, data causes address
     // error.
 
-    reference       operator[](const size_type)       noexcept {return *data();}
+    reference       operator[](const size_type)       noexcept {never_call("toml::discard_comment::operator[]");}
-    const_reference operator[](const size_type) const noexcept {return *data();}
+    const_reference operator[](const size_type) const noexcept {never_call("toml::discard_comment::operator[]");}
     reference       at(const size_type)       {throw std::out_of_range("toml::discard_comment is always empty.");}
     const_reference at(const size_type) const {throw std::out_of_range("toml::discard_comment is always empty.");}
-    reference       front()       noexcept {return *data();}
+    reference       front()       noexcept {never_call("toml::discard_comment::front");}
-    const_reference front() const noexcept {return *data();}
+    const_reference front() const noexcept {never_call("toml::discard_comment::front");}
-    reference       back()        noexcept {return *data();}
+    reference       back()        noexcept {never_call("toml::discard_comment::back");}
-    const_reference back()  const noexcept {return *data();}
+    const_reference back()  const noexcept {never_call("toml::discard_comment::back");}
 
     pointer         data()        noexcept {return nullptr;}
     const_pointer   data()  const noexcept {return nullptr;}
@@ -443,6 +450,18 @@ struct discard_comments
     const_reverse_iterator rend()    const noexcept {return const_iterator{};}
     const_reverse_iterator crbegin() const noexcept {return const_iterator{};}
     const_reverse_iterator crend()   const noexcept {return const_iterator{};}
+
+  private:
+
+    [[noreturn]] static void never_call(const char *const this_function)
+    {
+#ifdef __has_builtin
+#  if __has_builtin(__builtin_unreachable)
+        __builtin_unreachable();
+#  endif
+#endif
+        throw std::logic_error{this_function};
+    }
 };
 
 inline bool operator==(const discard_comments&, const discard_comments&) noexcept {return true;}

third_party/toml11-3.8.1/toml/datetime.hpp

@@ -21,22 +21,7 @@ namespace toml
 namespace detail
 {
 // TODO: find more sophisticated way to handle this
-#if (defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE >= 1) || defined(_XOPEN_SOURCE) || defined(_BSD_SOURCE) || defined(_SVID_SOURCE) || defined(_POSIX_SOURCE)
+#if defined(_MSC_VER)
-inline std::tm localtime_s(const std::time_t* src)
-{
-    std::tm dst;
-    const auto result = ::localtime_r(src, &dst);
-    if (!result) { throw std::runtime_error("localtime_r failed."); }
-    return dst;
-}
-inline std::tm gmtime_s(const std::time_t* src)
-{
-    std::tm dst;
-    const auto result = ::gmtime_r(src, &dst);
-    if (!result) { throw std::runtime_error("gmtime_r failed."); }
-    return dst;
-}
-#elif defined(_MSC_VER)
 inline std::tm localtime_s(const std::time_t* src)
 {
     std::tm dst;
@@ -51,6 +36,21 @@ inline std::tm gmtime_s(const std::time_t* src)
     if (result) { throw std::runtime_error("gmtime_s failed."); }
     return dst;
 }
+#elif (defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE >= 1) || defined(_XOPEN_SOURCE) || defined(_BSD_SOURCE) || defined(_SVID_SOURCE) || defined(_POSIX_SOURCE)
+inline std::tm localtime_s(const std::time_t* src)
+{
+    std::tm dst;
+    const auto result = ::localtime_r(src, &dst);
+    if (!result) { throw std::runtime_error("localtime_r failed."); }
+    return dst;
+}
+inline std::tm gmtime_s(const std::time_t* src)
+{
+    std::tm dst;
+    const auto result = ::gmtime_r(src, &dst);
+    if (!result) { throw std::runtime_error("gmtime_r failed."); }
+    return dst;
+}
 #else // fallback. not threadsafe
 inline std::tm localtime_s(const std::time_t* src)
 {
@@ -85,9 +85,9 @@ enum class month_t : std::uint8_t
 
 struct local_date
 {
-    std::int16_t year;   // A.D. (like, 2018)
+    std::int16_t year{};   // A.D. (like, 2018)
-    std::uint8_t month;  // [0, 11]
+    std::uint8_t month{};  // [0, 11]
-    std::uint8_t day;    // [1, 31]
+    std::uint8_t day{};    // [1, 31]
 
     local_date(int y, month_t m, int d)
         : year (static_cast<std::int16_t>(y)),
@@ -181,12 +181,12 @@ operator<<(std::basic_ostream<charT, traits>& os, const local_date& date)
 
 struct local_time
 {
-    std::uint8_t  hour;        // [0, 23]
+    std::uint8_t  hour{};        // [0, 23]
-    std::uint8_t  minute;      // [0, 59]
+    std::uint8_t  minute{};      // [0, 59]
-    std::uint8_t  second;      // [0, 60]
+    std::uint8_t  second{};      // [0, 60]
-    std::uint16_t millisecond; // [0, 999]
+    std::uint16_t millisecond{}; // [0, 999]
-    std::uint16_t microsecond; // [0, 999]
+    std::uint16_t microsecond{}; // [0, 999]
-    std::uint16_t nanosecond;  // [0, 999]
+    std::uint16_t nanosecond{};  // [0, 999]
 
     local_time(int h, int m, int s,
                int ms = 0, int us = 0, int ns = 0)
@@ -297,8 +297,8 @@ operator<<(std::basic_ostream<charT, traits>& os, const local_time& time)
 
 struct time_offset
 {
-    std::int8_t hour;   // [-12, 12]
+    std::int8_t hour{};   // [-12, 12]
-    std::int8_t minute; // [-59, 59]
+    std::int8_t minute{}; // [-59, 59]
 
     time_offset(int h, int m)
         : hour  (static_cast<std::int8_t>(h)),
@@ -364,8 +364,8 @@ operator<<(std::basic_ostream<charT, traits>& os, const time_offset& offset)
 
 struct local_datetime
 {
-    local_date date;
+    local_date date{};
-    local_time time;
+    local_time time{};
 
     local_datetime(local_date d, local_time t): date(d), time(t) {}
 
@@ -478,9 +478,9 @@ operator<<(std::basic_ostream<charT, traits>& os, const local_datetime& dt)
 
 struct offset_datetime
 {
-    local_date  date;
+    local_date  date{};
-    local_time  time;
+    local_time  time{};
-    time_offset offset;
+    time_offset offset{};
 
     offset_datetime(local_date d, local_time t, time_offset o)
         : date(d), time(t), offset(o)

third_party/toml11-3.8.1/toml/exception.hpp

@@ -2,14 +2,32 @@
 // Distributed under the MIT License.
 #ifndef TOML11_EXCEPTION_HPP
 #define TOML11_EXCEPTION_HPP
-#include <stdexcept>
+
+#include <array>
 #include <string>
+#include <stdexcept>
+
+#include <cstring>
 
 #include "source_location.hpp"
 
 namespace toml
 {
 
+struct file_io_error : public std::runtime_error
+{
+  public:
+    file_io_error(int errnum, const std::string& msg, const std::string& fname)
+        : std::runtime_error(msg + " \"" + fname + "\": errno = " + std::to_string(errnum)),
+          errno_(errnum)
+    {}
+
+    int get_errno() const noexcept {return errno_;}
+
+  private:
+    int errno_;
+};
+
 struct exception : public std::exception
 {
   public:

third_party/toml11-3.8.1/toml/from.hpp

@@ -2,7 +2,6 @@
 // Distributed under the MIT License.
 #ifndef TOML11_FROM_HPP
 #define TOML11_FROM_HPP
-#include "traits.hpp"
 
 namespace toml
 {

third_party/toml11-3.8.1/toml/get.hpp

@@ -140,7 +140,7 @@ get(basic_value<C, M, V>&& v)
 // ============================================================================
 // std::string_view
 
-#if __cplusplus >= 201703L
+#if defined(TOML11_USING_STRING_VIEW) && TOML11_USING_STRING_VIEW>0
 template<typename T, typename C,
          template<typename ...> class M, template<typename ...> class V>
 inline detail::enable_if_t<std::is_same<T, std::string_view>::value, std::string_view>
@@ -215,6 +215,7 @@ template<typename T, typename C,
 detail::enable_if_t<detail::conjunction<
     detail::is_container<T>,                           // T is a container
     detail::negation<detail::has_push_back_method<T>>, // w/o push_back(...)
+    detail::negation<detail::has_specialized_from<T>>, // T does not have special conversion
     detail::negation<                                  // not toml::array
         detail::is_exact_toml_type<T, basic_value<C, M, V>>>
     >::value, T>
@@ -255,19 +256,37 @@ get(const basic_value<C, M, V>&);
 
 // toml::from<T>::from_toml(v)
 template<typename T, typename C,
-         template<typename ...> class M, template<typename ...> class V,
+         template<typename ...> class M, template<typename ...> class V>
-         std::size_t S = sizeof(::toml::from<T>)>
+detail::enable_if_t<detail::has_specialized_from<T>::value, T>
-T get(const basic_value<C, M, V>&);
+get(const basic_value<C, M, V>&);
 
-// T(const toml::value&) and T is not toml::basic_value
+template<typename T, typename C,
+         template<typename ...> class M, template<typename ...> class V>
+detail::enable_if_t<detail::has_specialized_from<T>::value, T>
+get(basic_value<C, M, V>&);
+
+// T(const toml::value&) and T is not toml::basic_value,
+// and it does not have `from<T>` nor `from_toml`.
 template<typename T, typename C,
          template<typename ...> class M, template<typename ...> class V>
 detail::enable_if_t<detail::conjunction<
     detail::negation<detail::is_basic_value<T>>,
-    std::is_constructible<T, const basic_value<C, M, V>&>
+    std::is_constructible<T, const basic_value<C, M, V>&>,
+    detail::negation<detail::has_from_toml_method<T, C, M, V>>,
+    detail::negation<detail::has_specialized_from<T>>
     >::value, T>
 get(const basic_value<C, M, V>&);
 
+template<typename T, typename C,
+         template<typename ...> class M, template<typename ...> class V>
+detail::enable_if_t<detail::conjunction<
+    detail::negation<detail::is_basic_value<T>>,
+    std::is_constructible<T, basic_value<C, M, V>&>,
+    detail::negation<detail::has_from_toml_method<T, C, M, V>>,
+    detail::negation<detail::has_specialized_from<T>>
+    >::value, T>
+get(basic_value<C, M, V>&);
+
 // ============================================================================
 // array-like types; most likely STL container, like std::vector, etc.
 
@@ -321,6 +340,7 @@ template<typename T, typename C,
 detail::enable_if_t<detail::conjunction<
     detail::is_container<T>,                           // T is a container
     detail::negation<detail::has_push_back_method<T>>, // w/o push_back
+    detail::negation<detail::has_specialized_from<T>>, // T does not have special conversion
     detail::negation<                                  // T is not toml::array
         detail::is_exact_toml_type<T, basic_value<C, M, V>>>
     >::value, T>
@@ -338,8 +358,10 @@ get(const basic_value<C, M, V>& v)
                 {v.location(), "here"}
             }));
     }
-    std::transform(ar.cbegin(), ar.cend(), container.begin(),
+    for(std::size_t i=0; i<ar.size(); ++i)
-                   [](const value& x){return ::toml::get<value_type>(x);});
+    {
+        container[i] = ::toml::get<value_type>(ar[i]);
+    }
     return container;
 }
 
@@ -438,9 +460,16 @@ get(const basic_value<C, M, V>& v)
     return ud;
 }
 template<typename T, typename C,
-         template<typename ...> class M, template<typename ...> class V,
+         template<typename ...> class M, template<typename ...> class V>
-         std::size_t>
+detail::enable_if_t<detail::has_specialized_from<T>::value, T>
-T get(const basic_value<C, M, V>& v)
+get(const basic_value<C, M, V>& v)
+{
+    return ::toml::from<T>::from_toml(v);
+}
+template<typename T, typename C,
+         template<typename ...> class M, template<typename ...> class V>
+detail::enable_if_t<detail::has_specialized_from<T>::value, T>
+get(basic_value<C, M, V>& v)
 {
     return ::toml::from<T>::from_toml(v);
 }
@@ -448,14 +477,29 @@ T get(const basic_value<C, M, V>& v)
 template<typename T, typename C,
          template<typename ...> class M, template<typename ...> class V>
 detail::enable_if_t<detail::conjunction<
-    detail::negation<detail::is_basic_value<T>>,
+    detail::negation<detail::is_basic_value<T>>,                // T is not a toml::value
-    std::is_constructible<T, const basic_value<C, M, V>&>
+    std::is_constructible<T, const basic_value<C, M, V>&>,      // T is constructible from toml::value
+    detail::negation<detail::has_from_toml_method<T, C, M, V>>, // and T does not have T.from_toml(v);
+    detail::negation<detail::has_specialized_from<T>>           // and T does not have toml::from<T>{};
     >::value, T>
 get(const basic_value<C, M, V>& v)
 {
     return T(v);
 }
 
+template<typename T, typename C,
+         template<typename ...> class M, template<typename ...> class V>
+detail::enable_if_t<detail::conjunction<
+    detail::negation<detail::is_basic_value<T>>,                // T is not a toml::value
+    std::is_constructible<T, basic_value<C, M, V>&>,      // T is constructible from toml::value
+    detail::negation<detail::has_from_toml_method<T, C, M, V>>, // and T does not have T.from_toml(v);
+    detail::negation<detail::has_specialized_from<T>>           // and T does not have toml::from<T>{};
+    >::value, T>
+get(basic_value<C, M, V>& v)
+{
+    return T(v);
+}
+
 // ============================================================================
 // find
 
@@ -1031,6 +1075,50 @@ find_or(const basic_value<C, M, V>& v, const toml::key& ky, T&& opt)
     return get_or(tab.at(ky), std::forward<T>(opt));
 }
 
+// ---------------------------------------------------------------------------
+// recursive find-or with type deduction (find_or(value, keys, opt))
+
+template<typename Value, typename ... Ks,
+         typename detail::enable_if_t<(sizeof...(Ks) > 1), std::nullptr_t> = nullptr>
+         // here we need to add SFINAE in the template parameter to avoid
+         // infinite recursion in type deduction on gcc
+auto find_or(Value&& v, const toml::key& ky, Ks&& ... keys)
+    -> decltype(find_or(std::forward<Value>(v), ky, detail::last_one(std::forward<Ks>(keys)...)))
+{
+    if(!v.is_table())
+    {
+        return detail::last_one(std::forward<Ks>(keys)...);
+    }
+    auto&& tab = std::forward<Value>(v).as_table();
+    if(tab.count(ky) == 0)
+    {
+        return detail::last_one(std::forward<Ks>(keys)...);
+    }
+    return find_or(std::forward<decltype(tab)>(tab).at(ky), std::forward<Ks>(keys)...);
+}
+
+// ---------------------------------------------------------------------------
+// recursive find_or with explicit type specialization, find_or<int>(value, keys...)
+
+template<typename T, typename Value, typename ... Ks,
+         typename detail::enable_if_t<(sizeof...(Ks) > 1), std::nullptr_t> = nullptr>
+         // here we need to add SFINAE in the template parameter to avoid
+         // infinite recursion in type deduction on gcc
+auto find_or(Value&& v, const toml::key& ky, Ks&& ... keys)
+    -> decltype(find_or<T>(std::forward<Value>(v), ky, detail::last_one(std::forward<Ks>(keys)...)))
+{
+    if(!v.is_table())
+    {
+        return detail::last_one(std::forward<Ks>(keys)...);
+    }
+    auto&& tab = std::forward<Value>(v).as_table();
+    if(tab.count(ky) == 0)
+    {
+        return detail::last_one(std::forward<Ks>(keys)...);
+    }
+    return find_or(std::forward<decltype(tab)>(tab).at(ky), std::forward<Ks>(keys)...);
+}
+
 // ============================================================================
 // expect
 

third_party/toml11-3.8.1/toml/into.hpp

@@ -2,7 +2,6 @@
 // Distributed under the MIT License.
 #ifndef TOML11_INTO_HPP
 #define TOML11_INTO_HPP
-#include "traits.hpp"
 
 namespace toml
 {

third_party/toml11-3.8.1/toml/lexer.hpp

@@ -5,7 +5,6 @@
 #include <istream>
 #include <sstream>
 #include <stdexcept>
-#include <fstream>
 
 #include "combinator.hpp"
 
@@ -119,8 +118,8 @@ using lex_local_time       = lex_partial_time;
 // ===========================================================================
 
 using lex_quotation_mark  = character<'"'>;
-using lex_basic_unescaped = exclude<either<in_range<0x00, 0x08>, // 0x09 (tab)
+using lex_basic_unescaped = exclude<either<in_range<0x00, 0x08>, // 0x09 (tab) is allowed
-                                           in_range<0x0a, 0x1F>, // is allowed
+                                           in_range<0x0A, 0x1F>,
                                            character<0x22>, character<0x5C>,
                                            character<0x7F>>>;
 
@@ -133,6 +132,9 @@ using lex_escape_seq_char = either<character<'"'>, character<'\\'>,
                                    character<'b'>, character<'f'>,
                                    character<'n'>, character<'r'>,
                                    character<'t'>,
+#ifdef TOML11_USE_UNRELEASED_TOML_FEATURES
+                                   character<'e'>, // ESC (0x1B)
+#endif
                                    lex_escape_unicode_short,
                                    lex_escape_unicode_long
                                    >;
@@ -166,7 +168,7 @@ using lex_basic_string = sequence<lex_quotation_mark,
 //     |                                                               ^- expected newline, but got '"'.
 // ```
 // As a quick workaround for this problem, `lex_ml_basic_string_delim` was
-// splitted into two, `lex_ml_basic_string_open` and `lex_ml_basic_string_close`.
+// split into two, `lex_ml_basic_string_open` and `lex_ml_basic_string_close`.
 // `lex_ml_basic_string_open` allows only `"""`. `_close` allows 3-5 `"`s.
 // In parse_ml_basic_string() function, the trailing `"`s will be attached to
 // the string body.
@@ -178,8 +180,8 @@ using lex_ml_basic_string_close = sequence<
         maybe<lex_quotation_mark>, maybe<lex_quotation_mark>
     >;
 
-using lex_ml_basic_unescaped    = exclude<either<in_range<0x00, 0x08>, // 0x09
+using lex_ml_basic_unescaped    = exclude<either<in_range<0x00, 0x08>, // 0x09 is tab
-                                                 in_range<0x0a, 0x1F>, // is tab
+                                                 in_range<0x0A, 0x1F>,
                                                  character<0x5C>, // backslash
                                                  character<0x7F>, // DEL
                                                  lex_ml_basic_string_delim>>;
@@ -196,8 +198,8 @@ using lex_ml_basic_string = sequence<lex_ml_basic_string_open,
                                      lex_ml_basic_body,
                                      lex_ml_basic_string_close>;
 
-using lex_literal_char = exclude<either<in_range<0x00, 0x08>,
+using lex_literal_char = exclude<either<in_range<0x00, 0x08>, in_range<0x0A, 0x1F>,
-                                        in_range<0x10, 0x19>, character<0x27>>>;
+                                        character<0x7F>, character<0x27>>>;
 using lex_apostrophe = character<'\''>;
 using lex_literal_string = sequence<lex_apostrophe,
                                     repeat<lex_literal_char, unlimited>,
@@ -212,7 +214,7 @@ using lex_ml_literal_string_close = sequence<
     >;
 
 using lex_ml_literal_char = exclude<either<in_range<0x00, 0x08>,
-                                           in_range<0x10, 0x1F>,
+                                           in_range<0x0A, 0x1F>,
                                            character<0x7F>,
                                            lex_ml_literal_string_delim>>;
 using lex_ml_literal_body = repeat<either<lex_ml_literal_char, lex_newline>,
@@ -225,12 +227,6 @@ using lex_string = either<lex_ml_basic_string,   lex_basic_string,
                           lex_ml_literal_string, lex_literal_string>;
 
 // ===========================================================================
-
-using lex_comment_start_symbol = character<'#'>;
-using lex_non_eol = either<character<'\t'>, exclude<in_range<0x00, 0x19>>>;
-using lex_comment = sequence<lex_comment_start_symbol,
-                             repeat<lex_non_eol, unlimited>>;
-
 using lex_dot_sep = sequence<maybe<lex_ws>, character<'.'>, maybe<lex_ws>>;
 
 using lex_unquoted_key = repeat<either<lex_alpha, lex_digit,
@@ -265,6 +261,34 @@ using lex_array_table       = sequence<lex_array_table_open,
                                        maybe<lex_ws>,
                                        lex_array_table_close>;
 
+using lex_utf8_1byte = in_range<0x00, 0x7F>;
+using lex_utf8_2byte = sequence<
+        in_range<'\xC2', '\xDF'>,
+        in_range<'\x80', '\xBF'>
+    >;
+using lex_utf8_3byte = sequence<either<
+        sequence<character<'\xE0'>, in_range<'\xA0', '\xBF'>>,
+        sequence<in_range<'\xE1', '\xEC'>, in_range<'\x80', '\xBF'>>,
+        sequence<character<'\xED'>, in_range<'\x80', '\x9F'>>,
+        sequence<in_range<'\xEE', '\xEF'>, in_range<'\x80', '\xBF'>>
+    >, in_range<'\x80', '\xBF'>>;
+using lex_utf8_4byte = sequence<either<
+        sequence<character<'\xF0'>, in_range<'\x90', '\xBF'>>,
+        sequence<in_range<'\xF1', '\xF3'>, in_range<'\x80', '\xBF'>>,
+        sequence<character<'\xF4'>, in_range<'\x80', '\x8F'>>
+    >, in_range<'\x80', '\xBF'>, in_range<'\x80', '\xBF'>>;
+using lex_utf8_code = either<
+        lex_utf8_1byte,
+        lex_utf8_2byte,
+        lex_utf8_3byte,
+        lex_utf8_4byte
+    >;
+
+using lex_comment_start_symbol = character<'#'>;
+using lex_non_eol_ascii = either<character<0x09>, in_range<0x20, 0x7E>>;
+using lex_comment = sequence<lex_comment_start_symbol, repeat<either<
+    lex_non_eol_ascii, lex_utf8_2byte, lex_utf8_3byte, lex_utf8_4byte>, unlimited>>;
+
 } // detail
 } // toml
 #endif // TOML_LEXER_HPP

third_party/toml11-3.8.1/toml/literal.hpp

@@ -12,8 +12,11 @@ inline namespace toml_literals
 {
 
 // implementation
-inline ::toml::value literal_internal_impl(::toml::detail::location loc)
+inline ::toml::basic_value<TOML11_DEFAULT_COMMENT_STRATEGY, std::unordered_map, std::vector>
+literal_internal_impl(::toml::detail::location loc)
 {
+    using value_type = ::toml::basic_value<
+        TOML11_DEFAULT_COMMENT_STRATEGY, std::unordered_map, std::vector>;
     // if there are some comments or empty lines, skip them.
     using skip_line = ::toml::detail::repeat<toml::detail::sequence<
             ::toml::detail::maybe<::toml::detail::lex_ws>,
@@ -50,7 +53,7 @@ inline ::toml::value literal_internal_impl(::toml::detail::location loc)
     // If it is neither a table-key or a array-of-table-key, it may be a value.
     if(!is_table_key && !is_aots_key)
     {
-        if(auto data = ::toml::detail::parse_value<::toml::value>(loc))
+        if(auto data = ::toml::detail::parse_value<value_type>(loc, 0))
         {
             return data.unwrap();
         }
@@ -67,7 +70,7 @@ inline ::toml::value literal_internal_impl(::toml::detail::location loc)
     // It is a valid toml file.
     // It should be parsed as if we parse a file with this content.
 
-    if(auto data = ::toml::detail::parse_toml_file<::toml::value>(loc))
+    if(auto data = ::toml::detail::parse_toml_file<value_type>(loc))
     {
         return data.unwrap();
     }
@@ -78,11 +81,13 @@ inline ::toml::value literal_internal_impl(::toml::detail::location loc)
 
 }
 
-inline ::toml::value operator"" _toml(const char* str, std::size_t len)
+inline ::toml::basic_value<TOML11_DEFAULT_COMMENT_STRATEGY, std::unordered_map, std::vector>
+operator"" _toml(const char* str, std::size_t len)
 {
     ::toml::detail::location loc(
             std::string("TOML literal encoded in a C++ code"),
             std::vector<char>(str, str + len));
+    // literal length does not include the null character at the end.
     return literal_internal_impl(std::move(loc));
 }
 
@@ -91,7 +96,8 @@ inline ::toml::value operator"" _toml(const char* str, std::size_t len)
 #if defined(__cpp_char8_t) && __cpp_char8_t >= 201811L
 // value of u8"" literal has been changed from char to char8_t and char8_t is
 // NOT compatible to char
-inline ::toml::value operator"" _toml(const char8_t* str, std::size_t len)
+inline ::toml::basic_value<TOML11_DEFAULT_COMMENT_STRATEGY, std::unordered_map, std::vector>
+operator"" _toml(const char8_t* str, std::size_t len)
 {
     ::toml::detail::location loc(
             std::string("TOML literal encoded in a C++ code"),

third_party/toml11-3.8.1/toml/macros.hpp

@@ -0,0 +1,121 @@
+#ifndef TOML11_MACROS_HPP
+#define TOML11_MACROS_HPP
+
+#define TOML11_STRINGIZE_AUX(x) #x
+#define TOML11_STRINGIZE(x)     TOML11_STRINGIZE_AUX(x)
+
+#define TOML11_CONCATENATE_AUX(x, y) x##y
+#define TOML11_CONCATENATE(x, y)     TOML11_CONCATENATE_AUX(x, y)
+
+// ============================================================================
+// TOML11_DEFINE_CONVERSION_NON_INTRUSIVE
+
+#ifndef TOML11_WITHOUT_DEFINE_NON_INTRUSIVE
+
+// ----------------------------------------------------------------------------
+// TOML11_ARGS_SIZE
+
+#define TOML11_INDEX_RSEQ() \
+    32, 31, 30, 29, 28, 27, 26, 25, 24, 23, 22, 21, 20, 19, 18, 17, \
+    16, 15, 14, 13, 12, 11, 10,  9,  8,  7,  6,  5,  4,  3,  2,  1, 0
+#define TOML11_ARGS_SIZE_IMPL(\
+    ARG1,  ARG2,  ARG3,  ARG4,  ARG5,  ARG6,  ARG7,  ARG8,  ARG9,  ARG10, \
+    ARG11, ARG12, ARG13, ARG14, ARG15, ARG16, ARG17, ARG18, ARG19, ARG20, \
+    ARG21, ARG22, ARG23, ARG24, ARG25, ARG26, ARG27, ARG28, ARG29, ARG30, \
+    ARG31, ARG32, N, ...) N
+#define TOML11_ARGS_SIZE_AUX(...) TOML11_ARGS_SIZE_IMPL(__VA_ARGS__)
+#define TOML11_ARGS_SIZE(...) TOML11_ARGS_SIZE_AUX(__VA_ARGS__, TOML11_INDEX_RSEQ())
+
+// ----------------------------------------------------------------------------
+// TOML11_FOR_EACH_VA_ARGS
+
+#define TOML11_FOR_EACH_VA_ARGS_AUX_1( FUNCTOR, ARG1     ) FUNCTOR(ARG1)
+#define TOML11_FOR_EACH_VA_ARGS_AUX_2( FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_1( FUNCTOR, __VA_ARGS__)
+#define TOML11_FOR_EACH_VA_ARGS_AUX_3( FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_2( FUNCTOR, __VA_ARGS__)
+#define TOML11_FOR_EACH_VA_ARGS_AUX_4( FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_3( FUNCTOR, __VA_ARGS__)
+#define TOML11_FOR_EACH_VA_ARGS_AUX_5( FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_4( FUNCTOR, __VA_ARGS__)
+#define TOML11_FOR_EACH_VA_ARGS_AUX_6( FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_5( FUNCTOR, __VA_ARGS__)
+#define TOML11_FOR_EACH_VA_ARGS_AUX_7( FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_6( FUNCTOR, __VA_ARGS__)
+#define TOML11_FOR_EACH_VA_ARGS_AUX_8( FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_7( FUNCTOR, __VA_ARGS__)
+#define TOML11_FOR_EACH_VA_ARGS_AUX_9( FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_8( FUNCTOR, __VA_ARGS__)
+#define TOML11_FOR_EACH_VA_ARGS_AUX_10(FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_9( FUNCTOR, __VA_ARGS__)
+#define TOML11_FOR_EACH_VA_ARGS_AUX_11(FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_10(FUNCTOR, __VA_ARGS__)
+#define TOML11_FOR_EACH_VA_ARGS_AUX_12(FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_11(FUNCTOR, __VA_ARGS__)
+#define TOML11_FOR_EACH_VA_ARGS_AUX_13(FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_12(FUNCTOR, __VA_ARGS__)
+#define TOML11_FOR_EACH_VA_ARGS_AUX_14(FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_13(FUNCTOR, __VA_ARGS__)
+#define TOML11_FOR_EACH_VA_ARGS_AUX_15(FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_14(FUNCTOR, __VA_ARGS__)
+#define TOML11_FOR_EACH_VA_ARGS_AUX_16(FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_15(FUNCTOR, __VA_ARGS__)
+#define TOML11_FOR_EACH_VA_ARGS_AUX_17(FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_16(FUNCTOR, __VA_ARGS__)
+#define TOML11_FOR_EACH_VA_ARGS_AUX_18(FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_17(FUNCTOR, __VA_ARGS__)
+#define TOML11_FOR_EACH_VA_ARGS_AUX_19(FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_18(FUNCTOR, __VA_ARGS__)
+#define TOML11_FOR_EACH_VA_ARGS_AUX_20(FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_19(FUNCTOR, __VA_ARGS__)
+#define TOML11_FOR_EACH_VA_ARGS_AUX_21(FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_20(FUNCTOR, __VA_ARGS__)
+#define TOML11_FOR_EACH_VA_ARGS_AUX_22(FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_21(FUNCTOR, __VA_ARGS__)
+#define TOML11_FOR_EACH_VA_ARGS_AUX_23(FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_22(FUNCTOR, __VA_ARGS__)
+#define TOML11_FOR_EACH_VA_ARGS_AUX_24(FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_23(FUNCTOR, __VA_ARGS__)
+#define TOML11_FOR_EACH_VA_ARGS_AUX_25(FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_24(FUNCTOR, __VA_ARGS__)
+#define TOML11_FOR_EACH_VA_ARGS_AUX_26(FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_25(FUNCTOR, __VA_ARGS__)
+#define TOML11_FOR_EACH_VA_ARGS_AUX_27(FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_26(FUNCTOR, __VA_ARGS__)
+#define TOML11_FOR_EACH_VA_ARGS_AUX_28(FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_27(FUNCTOR, __VA_ARGS__)
+#define TOML11_FOR_EACH_VA_ARGS_AUX_29(FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_28(FUNCTOR, __VA_ARGS__)
+#define TOML11_FOR_EACH_VA_ARGS_AUX_30(FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_29(FUNCTOR, __VA_ARGS__)
+#define TOML11_FOR_EACH_VA_ARGS_AUX_31(FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_30(FUNCTOR, __VA_ARGS__)
+#define TOML11_FOR_EACH_VA_ARGS_AUX_32(FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_31(FUNCTOR, __VA_ARGS__)
+
+#define TOML11_FOR_EACH_VA_ARGS(FUNCTOR, ...)\
+    TOML11_CONCATENATE(TOML11_FOR_EACH_VA_ARGS_AUX_, TOML11_ARGS_SIZE(__VA_ARGS__))(FUNCTOR, __VA_ARGS__)
+
+// ----------------------------------------------------------------------------
+// TOML11_DEFINE_CONVERSION_NON_INTRUSIVE
+
+// use it in the following way.
+// ```cpp
+// namespace foo
+// {
+// struct Foo
+// {
+//     std::string s;
+//     double      d;
+//     int         i;
+// };
+// } // foo
+//
+// TOML11_DEFINE_CONVERSION_NON_INTRUSIVE(foo::Foo, s, d, i)
+// ```
+// And then you can use `toml::find<foo::Foo>(file, "foo");`
+//
+#define TOML11_FIND_MEMBER_VARIABLE_FROM_VALUE(VAR_NAME)\
+    obj.VAR_NAME = toml::find<decltype(obj.VAR_NAME)>(v, TOML11_STRINGIZE(VAR_NAME));
+
+#define TOML11_ASSIGN_MEMBER_VARIABLE_TO_VALUE(VAR_NAME)\
+    v[TOML11_STRINGIZE(VAR_NAME)] = obj.VAR_NAME;
+
+#define TOML11_DEFINE_CONVERSION_NON_INTRUSIVE(NAME, ...)\
+    namespace toml {                                                                     \
+    template<>                                                                           \
+    struct from<NAME>                                                                    \
+    {                                                                                    \
+        template<typename C, template<typename ...> class T,                             \
+                 template<typename ...> class A>                                         \
+        static NAME from_toml(const basic_value<C, T, A>& v)                             \
+        {                                                                                \
+            NAME obj;                                                                    \
+            TOML11_FOR_EACH_VA_ARGS(TOML11_FIND_MEMBER_VARIABLE_FROM_VALUE, __VA_ARGS__) \
+            return obj;                                                                  \
+        }                                                                                \
+    };                                                                                   \
+    template<>                                                                           \
+    struct into<NAME>                                                                    \
+    {                                                                                    \
+        static value into_toml(const NAME& obj)                                          \
+        {                                                                                \
+            ::toml::value v = ::toml::table{};                                           \
+            TOML11_FOR_EACH_VA_ARGS(TOML11_ASSIGN_MEMBER_VARIABLE_TO_VALUE, __VA_ARGS__) \
+            return v;                                                                    \
+        }                                                                                \
+    };                                                                                   \
+    } /* toml */
+
+#endif// TOML11_WITHOUT_DEFINE_NON_INTRUSIVE
+
+#endif// TOML11_MACROS_HPP

third_party/toml11-3.8.1/toml/region.hpp

@@ -70,16 +70,16 @@ struct region_base
 struct location final : public region_base
 {
     using const_iterator  = typename std::vector<char>::const_iterator;
-    using difference_type = typename const_iterator::difference_type;
+    using difference_type = typename std::iterator_traits<const_iterator>::difference_type;
     using source_ptr      = std::shared_ptr<const std::vector<char>>;
 
-    location(std::string name, std::vector<char> cont)
+    location(std::string source_name, std::vector<char> cont)
       : source_(std::make_shared<std::vector<char>>(std::move(cont))),
-        line_number_(1), source_name_(std::move(name)), iter_(source_->cbegin())
+        line_number_(1), source_name_(std::move(source_name)), iter_(source_->cbegin())
     {}
-    location(std::string name, const std::string& cont)
+    location(std::string source_name, const std::string& cont)
       : source_(std::make_shared<std::vector<char>>(cont.begin(), cont.end())),
-        line_number_(1), source_name_(std::move(name)), iter_(source_->cbegin())
+        line_number_(1), source_name_(std::move(source_name)), iter_(source_->cbegin())
     {}
 
     location(const location&) = default;
@@ -92,7 +92,7 @@ struct location final : public region_base
     char front() const noexcept override {return *iter_;}
 
     // this const prohibits codes like `++(loc.iter())`.
-    const const_iterator iter()  const noexcept {return iter_;}
+    std::add_const<const_iterator>::type iter()  const noexcept {return iter_;}
 
     const_iterator begin() const noexcept {return source_->cbegin();}
     const_iterator end()   const noexcept {return source_->cend();}
@@ -227,8 +227,7 @@ struct region final : public region_base
     region& operator+=(const region& other)
     {
         // different regions cannot be concatenated
-        assert(this->begin() == other.begin() && this->end() == other.end() &&
+        assert(this->source_ == other.source_ && this->last_ == other.first_);
-               this->last_   == other.first_);
 
         this->last_ = other.last_;
         return *this;
@@ -343,9 +342,9 @@ struct region final : public region_base
                             }))
                     {
                         // unwrap the first '#' by std::next.
-                        auto str = make_string(std::next(comment_found), iter);
+                        auto s = make_string(std::next(comment_found), iter);
-                        if(str.back() == '\r') {str.pop_back();}
+                        if(!s.empty() && s.back() == '\r') {s.pop_back();}
-                        com.push_back(std::move(str));
+                        com.push_back(std::move(s));
                     }
                     else
                     {
@@ -396,9 +395,9 @@ struct region final : public region_base
                     }))
                 {
                     // unwrap the first '#' by std::next.
-                    auto str = make_string(std::next(comment_found), this->line_end());
+                    auto s = make_string(std::next(comment_found), this->line_end());
-                    if(str.back() == '\r') {str.pop_back();}
+                    if(!s.empty() && s.back() == '\r') {s.pop_back();}
-                    com.push_back(std::move(str));
+                    com.push_back(std::move(s));
                 }
             }
         }

third_party/toml11-3.8.1/toml/serializer.hpp

@@ -2,10 +2,19 @@
 // Distributed under the MIT License.
 #ifndef TOML11_SERIALIZER_HPP
 #define TOML11_SERIALIZER_HPP
+#include <cmath>
 #include <cstdio>
 
 #include <limits>
 
+#if defined(_WIN32)
+#include <locale.h>
+#elif defined(__APPLE__) || defined(__FreeBSD__)
+#include <xlocale.h>
+#elif defined(__linux__)
+#include <locale.h>
+#endif
+
 #include "lexer.hpp"
 #include "value.hpp"
 
@@ -26,19 +35,24 @@ namespace toml
 // a `"` and escaping some special character is boring.
 template<typename charT, typename traits, typename Alloc>
 std::basic_string<charT, traits, Alloc>
-format_key(const std::basic_string<charT, traits, Alloc>& key)
+format_key(const std::basic_string<charT, traits, Alloc>& k)
 {
+    if(k.empty())
+    {
+        return std::string("\"\"");
+    }
+
     // check the key can be a bare (unquoted) key
-    detail::location loc(key, std::vector<char>(key.begin(), key.end()));
+    detail::location loc(k, std::vector<char>(k.begin(), k.end()));
     detail::lex_unquoted_key::invoke(loc);
     if(loc.iter() == loc.end())
     {
-        return key; // all the tokens are consumed. the key is unquoted-key.
+        return k; // all the tokens are consumed. the key is unquoted-key.
     }
 
     //if it includes special characters, then format it in a "quoted" key.
     std::basic_string<charT, traits, Alloc> serialized("\"");
-    for(const char c : key)
+    for(const char c : k)
     {
         switch(c)
         {
@@ -49,7 +63,19 @@ format_key(const std::basic_string<charT, traits, Alloc>& key)
             case '\f': {serialized += "\\f";  break;}
             case '\n': {serialized += "\\n";  break;}
             case '\r': {serialized += "\\r";  break;}
-            default  : {serialized += c;      break;}
+            default: {
+                if (c >= 0x00 && c < 0x20)
+                {
+                    std::array<char, 7> buf;
+                    std::snprintf(buf.data(), buf.size(), "\\u00%02x", static_cast<int>(c));
+                    serialized += buf.data();
+                }
+                else
+                {
+                    serialized += c;
+                }
+                break;
+            }
         }
     }
     serialized += "\"";
@@ -60,9 +86,12 @@ template<typename charT, typename traits, typename Alloc>
 std::basic_string<charT, traits, Alloc>
 format_keys(const std::vector<std::basic_string<charT, traits, Alloc>>& keys)
 {
-    std::basic_string<charT, traits, Alloc> serialized;
+    if(keys.empty())
-    if(keys.empty()) {return serialized;}
+    {
+        return std::string("\"\"");
+    }
 
+    std::basic_string<charT, traits, Alloc> serialized;
     for(const auto& ky : keys)
     {
         serialized += format_key(ky);
@@ -97,8 +126,10 @@ struct serializer
                const int         float_prec     = std::numeric_limits<toml::floating>::max_digits10,
                const bool        can_be_inlined = false,
                const bool        no_comment     = false,
-               std::vector<toml::key> ks        = {})
+               std::vector<toml::key> ks        = {},
+               const bool     value_has_comment = false)
         : can_be_inlined_(can_be_inlined), no_comment_(no_comment),
+          value_has_comment_(value_has_comment && !no_comment),
           float_prec_(float_prec), width_(w), keys_(std::move(ks))
     {}
     ~serializer() = default;
@@ -109,18 +140,93 @@ struct serializer
     }
     std::string operator()(const integer_type i) const
     {
-        return std::to_string(i);
+#if defined(_WIN32)
+        _configthreadlocale(_ENABLE_PER_THREAD_LOCALE);
+        const std::string original_locale(setlocale(LC_NUMERIC, nullptr));
+        setlocale(LC_NUMERIC, "C");
+#elif defined(__APPLE__) || defined(__FreeBSD__) || defined(__linux__)
+        const auto c_locale = newlocale(LC_NUMERIC_MASK, "C", locale_t(0));
+        locale_t original_locale(0);
+        if(c_locale != locale_t(0))
+        {
+            original_locale = uselocale(c_locale);
+        }
+#endif
+
+        const auto str = std::to_string(i);
+
+#if defined(_WIN32)
+        setlocale(LC_NUMERIC, original_locale.c_str());
+        _configthreadlocale(_DISABLE_PER_THREAD_LOCALE);
+#elif defined(__APPLE__) || defined(__FreeBSD__) || defined(__linux__)
+        if(original_locale != locale_t(0))
+        {
+            uselocale(original_locale);
+        }
+#endif
+        return str;
     }
     std::string operator()(const floating_type f) const
     {
+        if(std::isnan(f))
+        {
+            if(std::signbit(f))
+            {
+                return std::string("-nan");
+            }
+            else
+            {
+                return std::string("nan");
+            }
+        }
+        else if(!std::isfinite(f))
+        {
+            if(std::signbit(f))
+            {
+                return std::string("-inf");
+            }
+            else
+            {
+                return std::string("inf");
+            }
+        }
+
+        // set locale to "C".
+        // To make it thread-local, we use OS-specific features.
+        // If we set process-global locale, it can break other thread that also
+        // outputs something simultaneously.
+#if defined(_WIN32)
+        _configthreadlocale(_ENABLE_PER_THREAD_LOCALE);
+        const std::string original_locale(setlocale(LC_NUMERIC, nullptr));
+        setlocale(LC_NUMERIC, "C");
+#elif defined(__APPLE__) || defined(__FreeBSD__) || defined(__linux__)
+        const auto c_locale = newlocale(LC_NUMERIC_MASK, "C", locale_t(0));
+        locale_t original_locale(0);
+        if(c_locale != locale_t(0))
+        {
+            original_locale = uselocale(c_locale);
+        }
+#endif
+
         const auto fmt = "%.*g";
         const auto bsz = std::snprintf(nullptr, 0, fmt, this->float_prec_, f);
         // +1 for null character(\0)
         std::vector<char> buf(static_cast<std::size_t>(bsz + 1), '\0');
         std::snprintf(buf.data(), buf.size(), fmt, this->float_prec_, f);
 
+        // restore the original locale
+#if defined(_WIN32)
+        setlocale(LC_NUMERIC, original_locale.c_str());
+        _configthreadlocale(_DISABLE_PER_THREAD_LOCALE);
+#elif defined(__APPLE__) || defined(__FreeBSD__) || defined(__linux__)
+        if(original_locale != locale_t(0))
+        {
+            uselocale(original_locale);
+        }
+#endif
+
         std::string token(buf.begin(), std::prev(buf.end()));
-        if(token.back() == '.') // 1. => 1.0
+        if(!token.empty() && token.back() == '.') // 1. => 1.0
         {
             token += '0';
         }
@@ -144,8 +250,9 @@ struct serializer
     {
         if(s.kind == string_t::basic)
         {
-            if(std::find(s.str.cbegin(), s.str.cend(), '\n') != s.str.cend() ||
+            if((std::find(s.str.cbegin(), s.str.cend(), '\n') != s.str.cend() ||
-               std::find(s.str.cbegin(), s.str.cend(), '\"') != s.str.cend())
+                std::find(s.str.cbegin(), s.str.cend(), '\"') != s.str.cend()) &&
+               this->width_ != (std::numeric_limits<std::size_t>::max)())
             {
                 // if linefeed or double-quote is contained,
                 // make it multiline basic string.
@@ -244,92 +351,18 @@ struct serializer
 
     std::string operator()(const array_type& v) const
     {
-        if(!v.empty() && v.front().is_table())// v is an array of tables
-        {
-            // if it's not inlined, we need to add `[[table.key]]`.
-            // but if it can be inlined,
-            // ```
-            // table.key = [
-            //   {...},
-            //   # comment
-            //   {...},
-            // ]
-            // ```
-            if(this->can_be_inlined_)
-            {
-                std::string token;
-                if(!keys_.empty())
-                {
-                    token += format_key(keys_.back());
-                    token += " = ";
-                }
-                bool failed = false;
-                token += "[\n";
-                for(const auto& item : v)
-                {
-                    // if an element of the table has a comment, the table
-                    // cannot be inlined.
-                    if(this->has_comment_inside(item.as_table()))
-                    {
-                        failed = true;
-                        break;
-                    }
-                    if(!no_comment_)
-                    {
-                        for(const auto& c : item.comments())
-                        {
-                            token += '#';
-                            token += c;
-                            token += '\n';
-                        }
-                    }
-
-                    const auto t = this->make_inline_table(item.as_table());
-
-                    if(t.size() + 1 > width_ || // +1 for the last comma {...},
-                       std::find(t.cbegin(), t.cend(), '\n') != t.cend())
-                    {
-                        failed = true;
-                        break;
-                    }
-                    token += t;
-                    token += ",\n";
-                }
-                if(!failed)
-                {
-                    token += "]\n";
-                    return token;
-                }
-                // if failed, serialize them as [[array.of.tables]].
-            }
-
-            std::string token;
-            for(const auto& item : v)
-            {
-                if(!no_comment_)
-                {
-                    for(const auto& c : item.comments())
-                    {
-                        token += '#';
-                        token += c;
-                        token += '\n';
-                    }
-                }
-                token += "[[";
-                token += format_keys(keys_);
-                token += "]]\n";
-                token += this->make_multiline_table(item.as_table());
-            }
-            return token;
-        }
         if(v.empty())
         {
             return std::string("[]");
         }
+        if(this->is_array_of_tables(v))
+        {
+            return make_array_of_tables(v);
+        }
 
         // not an array of tables. normal array.
         // first, try to make it inline if none of the elements have a comment.
-        if(!this->has_comment_inside(v))
+        if( ! this->has_comment_inside(v))
         {
             const auto inl = this->make_inline_array(v);
             if(inl.size() < this->width_ &&
@@ -350,7 +383,7 @@ struct serializer
         token += "[\n";
         for(const auto& item : v)
         {
-            if(!item.comments().empty() && !no_comment_)
+            if( ! item.comments().empty() && !no_comment_)
             {
                 // if comment exists, the element must be the only element in the line.
                 // e.g. the following is not allowed.
@@ -376,15 +409,25 @@ struct serializer
                     token += '\n';
                 }
                 token += toml::visit(*this, item);
-                if(token.back() == '\n') {token.pop_back();}
+                if(!token.empty() && token.back() == '\n') {token.pop_back();}
                 token += ",\n";
                 continue;
             }
             std::string next_elem;
-            next_elem += toml::visit(*this, item);
+            if(item.is_table())
+            {
+                serializer ser(*this);
+                ser.can_be_inlined_ = true;
+                ser.width_ = (std::numeric_limits<std::size_t>::max)();
+                next_elem += toml::visit(ser, item);
+            }
+            else
+            {
+                next_elem += toml::visit(*this, item);
+            }
 
             // comma before newline.
-            if(next_elem.back() == '\n') {next_elem.pop_back();}
+            if(!next_elem.empty() && next_elem.back() == '\n') {next_elem.pop_back();}
 
             // if current line does not exceeds the width limit, continue.
             if(current_line.size() + next_elem.size() + 1 < this->width_)
@@ -411,7 +454,10 @@ struct serializer
         }
         if(!current_line.empty())
         {
-            if(current_line.back() != '\n') {current_line += '\n';}
+            if(!current_line.empty() && current_line.back() != '\n')
+            {
+                current_line += '\n';
+            }
             token += current_line;
         }
         token += "]\n";
@@ -467,7 +513,19 @@ struct serializer
                 case '\f': {retval += "\\f";  break;}
                 case '\n': {retval += "\\n";  break;}
                 case '\r': {retval += "\\r";  break;}
-                default  : {retval += c;      break;}
+                default  :
+                {
+                    if((0x00 <= c && c <= 0x08) || (0x0A <= c && c <= 0x1F) || c == 0x7F)
+                    {
+                        retval += "\\u00";
+                        retval += char(48 + (c / 16));
+                        retval += char((c % 16 < 10 ? 48 : 55) + (c % 16));
+                    }
+                    else
+                    {
+                        retval += c;
+                    }
+                }
             }
         }
         return retval;
@@ -501,7 +559,21 @@ struct serializer
                     }
                     break;
                 }
-                default: {retval += *i; break;}
+                default  :
+                {
+                    const auto c = *i;
+                    if((0x00 <= c && c <= 0x08) || (0x0A <= c && c <= 0x1F) || c == 0x7F)
+                    {
+                        retval += "\\u00";
+                        retval += char(48 + (c / 16));
+                        retval += char((c % 16 < 10 ? 48 : 55) + (c % 16));
+                    }
+                    else
+                    {
+                        retval += c;
+                    }
+                }
+
             }
         }
         // Only 1 or 2 consecutive `"`s are allowed in multiline basic string.
@@ -557,8 +629,10 @@ struct serializer
         for(const auto& item : v)
         {
             if(is_first) {is_first = false;} else {token += ',';}
-            token += visit(serializer((std::numeric_limits<std::size_t>::max)(),
+            token += visit(serializer(
-                                      this->float_prec_, true), item);
+                (std::numeric_limits<std::size_t>::max)(), this->float_prec_,
+                /* inlined */ true, /*no comment*/ false, /*keys*/ {},
+                /*has_comment*/ !item.comments().empty()), item);
         }
         token += ']';
         return token;
@@ -577,8 +651,10 @@ struct serializer
             if(is_first) {is_first = false;} else {token += ',';}
             token += format_key(kv.first);
             token += '=';
-            token += visit(serializer((std::numeric_limits<std::size_t>::max)(),
+            token += visit(serializer(
-                                      this->float_prec_, true), kv.second);
+                (std::numeric_limits<std::size_t>::max)(), this->float_prec_,
+                /* inlined */ true, /*no comment*/ false, /*keys*/ {},
+                /*has_comment*/ !kv.second.comments().empty()), kv.second);
         }
         token += '}';
         return token;
@@ -588,8 +664,16 @@ struct serializer
     {
         std::string token;
 
-        // print non-table stuff first. because after printing [foo.bar], the
+        // print non-table elements first.
-        // remaining non-table values will be assigned into [foo.bar], not [foo]
+        // ```toml
+        // [foo]         # a table we're writing now here
+        // key = "value" # <- non-table element, "key"
+        // # ...
+        // [foo.bar] # <- table element, "bar"
+        // ```
+        // because after printing [foo.bar], the remaining non-table values will
+        // be assigned into [foo.bar], not [foo]. Those values should be printed
+        // earlier.
         for(const auto& kv : v)
         {
             if(kv.second.is_table() || is_array_of_tables(kv.second))
@@ -597,21 +681,16 @@ struct serializer
                 continue;
             }
 
-            if(!kv.second.comments().empty() && !no_comment_)
+            token += write_comments(kv.second);
-            {
+
-                for(const auto& c : kv.second.comments())
-                {
-                    token += '#';
-                    token += c;
-                    token += '\n';
-                }
-            }
             const auto key_and_sep    = format_key(kv.first) + " = ";
             const auto residual_width = (this->width_ > key_and_sep.size()) ?
                                         this->width_ - key_and_sep.size() : 0;
             token += key_and_sep;
-            token += visit(serializer(residual_width, this->float_prec_, true),
+            token += visit(serializer(residual_width, this->float_prec_,
-                           kv.second);
+                /*can be inlined*/ true, /*no comment*/ false, /*keys*/ {},
+                /*has_comment*/ !kv.second.comments().empty()), kv.second);
+
             if(token.back() != '\n')
             {
                 token += '\n';
@@ -637,45 +716,172 @@ struct serializer
             ks.push_back(kv.first);
 
             auto tmp = visit(serializer(this->width_, this->float_prec_,
-                !multiline_table_printed, this->no_comment_, ks),
+                !multiline_table_printed, this->no_comment_, ks,
-                kv.second);
+                /*has_comment*/ !kv.second.comments().empty()), kv.second);
 
+            // If it is the first time to print a multi-line table, it would be
+            // helpful to separate normal key-value pair and subtables by a
+            // newline.
+            // (this checks if the current key-value pair contains newlines.
+            //  but it is not perfect because multi-line string can also contain
+            //  a newline. in such a case, an empty line will be written) TODO
             if((!multiline_table_printed) &&
                std::find(tmp.cbegin(), tmp.cend(), '\n') != tmp.cend())
             {
                 multiline_table_printed = true;
-            }
+                token += '\n'; // separate key-value pairs and subtables
-            else
-            {
-                // still inline tables only.
-                tmp += '\n';
-            }
 
-            if(!kv.second.comments().empty() && !no_comment_)
+                token += write_comments(kv.second);
-            {
+                token += tmp;
-                for(const auto& c : kv.second.comments())
+
+                // care about recursive tables (all tables in each level prints
+                // newline and there will be a full of newlines)
+                if(tmp.substr(tmp.size() - 2, 2) != "\n\n" &&
+                   tmp.substr(tmp.size() - 4, 4) != "\r\n\r\n" )
                 {
-                    token += '#';
-                    token += c;
                     token += '\n';
                 }
             }
-            token += tmp;
+            else
+            {
+                token += write_comments(kv.second);
+                token += tmp;
+                token += '\n';
+            }
         }
         return token;
     }
 
+    std::string make_array_of_tables(const array_type& v) const
+    {
+        // if it's not inlined, we need to add `[[table.key]]`.
+        // but if it can be inlined, we can format it as the following.
+        // ```
+        // table.key = [
+        //   {...},
+        //   # comment
+        //   {...},
+        // ]
+        // ```
+        // This function checks if inlinization is possible or not, and then
+        // format the array-of-tables in a proper way.
+        //
+        // Note about comments:
+        //
+        // If the array itself has a comment (value_has_comment_ == true), we
+        // should try to make it inline.
+        // ```toml
+        // # comment about array
+        // array = [
+        //   # comment about table element
+        //   {of = "table"}
+        // ]
+        // ```
+        // If it is formatted as a multiline table, the two comments becomes
+        // indistinguishable.
+        // ```toml
+        // # comment about array
+        // # comment about table element
+        // [[array]]
+        // of = "table"
+        // ```
+        // So we need to try to make it inline, and it force-inlines regardless
+        // of the line width limit.
+        //     It may fail if the element of a table has comment. In that case,
+        // the array-of-tables will be formatted as a multiline table.
+        if(this->can_be_inlined_ || this->value_has_comment_)
+        {
+            std::string token;
+            if(!keys_.empty())
+            {
+                token += format_key(keys_.back());
+                token += " = ";
+            }
+
+            bool failed = false;
+            token += "[\n";
+            for(const auto& item : v)
+            {
+                // if an element of the table has a comment, the table
+                // cannot be inlined.
+                if(this->has_comment_inside(item.as_table()))
+                {
+                    failed = true;
+                    break;
+                }
+                // write comments for the table itself
+                token += write_comments(item);
+
+                const auto t = this->make_inline_table(item.as_table());
+
+                if(t.size() + 1 > width_ || // +1 for the last comma {...},
+                   std::find(t.cbegin(), t.cend(), '\n') != t.cend())
+                {
+                    // if the value itself has a comment, ignore the line width limit
+                    if( ! this->value_has_comment_)
+                    {
+                        failed = true;
+                        break;
+                    }
+                }
+                token += t;
+                token += ",\n";
+            }
+
+            if( ! failed)
+            {
+                token += "]\n";
+                return token;
+            }
+            // if failed, serialize them as [[array.of.tables]].
+        }
+
+        std::string token;
+        for(const auto& item : v)
+        {
+            token += write_comments(item);
+            token += "[[";
+            token += format_keys(keys_);
+            token += "]]\n";
+            token += this->make_multiline_table(item.as_table());
+        }
+        return token;
+    }
+
+    std::string write_comments(const value_type& v) const
+    {
+        std::string retval;
+        if(this->no_comment_) {return retval;}
+
+        for(const auto& c : v.comments())
+        {
+            retval += '#';
+            retval += c;
+            retval += '\n';
+        }
+        return retval;
+    }
+
     bool is_array_of_tables(const value_type& v) const
     {
-        if(!v.is_array()) {return false;}
+        if(!v.is_array() || v.as_array().empty()) {return false;}
-        const auto& a = v.as_array();
+        return is_array_of_tables(v.as_array());
-        return !a.empty() && a.front().is_table();
+    }
+    bool is_array_of_tables(const array_type& v) const
+    {
+        // Since TOML v0.5.0, heterogeneous arrays are allowed. So we need to
+        // check all the element in an array to check if the array is an array
+        // of tables.
+        return std::all_of(v.begin(), v.end(), [](const value_type& elem) {
+                return elem.is_table();
+            });
     }
 
   private:
 
     bool        can_be_inlined_;
     bool        no_comment_;
+    bool        value_has_comment_;
     int         float_prec_;
     std::size_t width_;
     std::vector<toml::key> keys_;
@@ -699,7 +905,7 @@ format(const basic_value<C, M, V>& v, std::size_t w = 80u,
             oss << v.comments();
             oss << '\n'; // to split the file comment from the first element
         }
-        const auto serialized = visit(serializer<value_type>(w, fprec, no_comment, false), v);
+        const auto serialized = visit(serializer<value_type>(w, fprec, false, no_comment), v);
         oss << serialized;
         return oss.str();
     }
@@ -720,7 +926,7 @@ template<typename charT, typename traits>
 std::basic_ostream<charT, traits>&
 nocomment(std::basic_ostream<charT, traits>& os)
 {
-    // by default, it is zero. and by defalut, it shows comments.
+    // by default, it is zero. and by default, it shows comments.
     os.iword(detail::comment_index(os)) = 1;
     return os;
 }
@@ -729,7 +935,7 @@ template<typename charT, typename traits>
 std::basic_ostream<charT, traits>&
 showcomment(std::basic_ostream<charT, traits>& os)
 {
-    // by default, it is zero. and by defalut, it shows comments.
+    // by default, it is zero. and by default, it shows comments.
     os.iword(detail::comment_index(os)) = 0;
     return os;
 }
@@ -746,7 +952,7 @@ operator<<(std::basic_ostream<charT, traits>& os, const basic_value<C, M, V>& v)
     const int  fprec = static_cast<int>(os.precision());
     os.width(0);
 
-    // by defualt, iword is initialized byl 0. And by default, toml11 outputs
+    // by default, iword is initialized by 0. And by default, toml11 outputs
     // comments. So `0` means showcomment. 1 means nocommnet.
     const bool no_comment = (1 == os.iword(detail::comment_index(os)));
 

third_party/toml11-3.8.1/toml/source_location.hpp

@@ -3,6 +3,7 @@
 #ifndef TOML11_SOURCE_LOCATION_HPP
 #define TOML11_SOURCE_LOCATION_HPP
 #include <cstdint>
+#include <sstream>
 
 #include "region.hpp"
 
@@ -124,7 +125,7 @@ inline std::string format_underline(const std::string& message,
 
     std::ostringstream retval;
 
-    if(colorize)
+    if(color::should_color() || colorize)
     {
         retval << color::colorize; // turn on ANSI color
     }
@@ -136,12 +137,18 @@ inline std::string format_underline(const std::string& message,
     // if it is "[error]", it removes that part from the message shown.
     if(message.size() > 7 && message.substr(0, 7) == "[error]")
     {
-        retval << color::bold << color::red << "[error]" << color::reset
+        retval
+#ifndef TOML11_NO_ERROR_PREFIX
+               << color::bold << color::red << "[error]" << color::reset
+#endif
                << color::bold << message.substr(7) << color::reset << '\n';
     }
     else
     {
-        retval << color::bold << color::red << "[error] " << color::reset
+        retval
+#ifndef TOML11_NO_ERROR_PREFIX
+               << color::bold << color::red << "[error] " << color::reset
+#endif
                << color::bold << message << color::reset << '\n';
     }
 

third_party/toml11-3.8.1/toml/string.hpp

@@ -2,13 +2,17 @@
 // Distributed under the MIT License.
 #ifndef TOML11_STRING_HPP
 #define TOML11_STRING_HPP
+
+#include "version.hpp"
+
 #include <cstdint>
 
 #include <algorithm>
 #include <string>
 
-#if __cplusplus >= 201703L
+#if TOML11_CPLUSPLUS_STANDARD_VERSION >= 201703L
 #if __has_include(<string_view>)
+#define TOML11_USING_STRING_VIEW 1
 #include <string_view>
 #endif
 #endif
@@ -53,7 +57,7 @@ struct string
     string& operator+=(const std::string& rhs) {str += rhs; return *this;}
     string& operator+=(const string&      rhs) {str += rhs.str; return *this;}
 
-#if __cplusplus >= 201703L
+#if defined(TOML11_USING_STRING_VIEW) && TOML11_USING_STRING_VIEW>0
     explicit string(std::string_view s): kind(string_t::basic), str(s){}
     string(std::string_view s, string_t k): kind(k), str(s){}
 

third_party/toml11-3.8.1/toml/traits.hpp

@@ -2,6 +2,11 @@
 // Distributed under the MIT License.
 #ifndef TOML11_TRAITS_HPP
 #define TOML11_TRAITS_HPP
+
+#include "from.hpp"
+#include "into.hpp"
+#include "version.hpp"
+
 #include <chrono>
 #include <forward_list>
 #include <string>
@@ -9,7 +14,7 @@
 #include <type_traits>
 #include <utility>
 
-#if __cplusplus >= 201703L
+#if TOML11_CPLUSPLUS_STANDARD_VERSION >= 201703L
 #if __has_include(<string_view>)
 #include <string_view>
 #endif // has_include(<string_view>)
@@ -84,6 +89,22 @@ struct has_into_toml_method_impl
     static std::false_type check(...);
 };
 
+struct has_specialized_from_impl
+{
+    template<typename T>
+    static std::false_type check(...);
+    template<typename T, std::size_t S = sizeof(::toml::from<T>)>
+    static std::true_type check(::toml::from<T>*);
+};
+struct has_specialized_into_impl
+{
+    template<typename T>
+    static std::false_type check(...);
+    template<typename T, std::size_t S = sizeof(::toml::into<T>)>
+    static std::true_type check(::toml::from<T>*);
+};
+
+
 /// Intel C++ compiler can not use decltype in parent class declaration, here
 /// is a hack to work around it. https://stackoverflow.com/a/23953090/4692076
 #ifdef __INTEL_COMPILER
@@ -114,6 +135,11 @@ template<typename T>
 struct has_into_toml_method
 : decltype(has_into_toml_method_impl::check<T>(nullptr)){};
 
+template<typename T>
+struct has_specialized_from : decltype(has_specialized_from_impl::check<T>(nullptr)){};
+template<typename T>
+struct has_specialized_into : decltype(has_specialized_into_impl::check<T>(nullptr)){};
+
 #ifdef __INTEL_COMPILER
 #undef decltype
 #endif
@@ -121,7 +147,7 @@ struct has_into_toml_method
 // ---------------------------------------------------------------------------
 // C++17 and/or/not
 
-#if __cplusplus >= 201703L
+#if TOML11_CPLUSPLUS_STANDARD_VERSION >= 201703L
 
 using std::conjunction;
 using std::disjunction;
@@ -183,8 +209,10 @@ template<typename T>
 struct is_container : conjunction<
     negation<is_map<T>>,                         // not a map
     negation<std::is_same<T, std::string>>,      // not a std::string
-#if __cplusplus >= 201703L
+#if TOML11_CPLUSPLUS_STANDARD_VERSION >= 201703L
+#if __has_include(<string_view>)
     negation<std::is_same<T, std::string_view>>, // not a std::string_view
+#endif // has_include(<string_view>)
 #endif
     has_iterator<T>,                             // has T::iterator
     has_value_type<T>                            // has T::value_type
@@ -206,7 +234,7 @@ struct is_basic_value<::toml::basic_value<C, M, V>>: std::true_type{};
 // ---------------------------------------------------------------------------
 // C++14 index_sequence
 
-#if __cplusplus >= 201402L
+#if TOML11_CPLUSPLUS_STANDARD_VERSION >= 201402L
 
 using std::index_sequence;
 using std::make_index_sequence;
@@ -236,12 +264,12 @@ struct index_sequence_maker<0>
 template<std::size_t N>
 using make_index_sequence = typename index_sequence_maker<N-1>::type;
 
-#endif // __cplusplus >= 2014
+#endif // cplusplus >= 2014
 
 // ---------------------------------------------------------------------------
 // C++14 enable_if_t
 
-#if __cplusplus >= 201402L
+#if TOML11_CPLUSPLUS_STANDARD_VERSION >= 201402L
 
 using std::enable_if_t;
 
@@ -250,12 +278,12 @@ using std::enable_if_t;
 template<bool B, typename T>
 using enable_if_t = typename std::enable_if<B, T>::type;
 
-#endif // __cplusplus >= 2014
+#endif // cplusplus >= 2014
 
 // ---------------------------------------------------------------------------
 // return_type_of_t
 
-#if __cplusplus >= 201703L
+#if TOML11_CPLUSPLUS_STANDARD_VERSION >= 201703L && defined(__cpp_lib_is_invocable) && __cpp_lib_is_invocable>=201703
 
 template<typename F, typename ... Args>
 using return_type_of_t = std::invoke_result_t<F, Args...>;

third_party/toml11-3.8.1/toml/types.hpp

@@ -21,9 +21,14 @@ class basic_value;
 using character = char;
 using key = std::string;
 
+#if !defined(__clang__) && defined(__GNUC__) && __GNUC__ <= 4
+#  pragma GCC diagnostic push
+#  pragma GCC diagnostic ignored "-Wshadow"
+#endif
+
 using boolean        = bool;
 using integer        = std::int64_t;
-using floating       = double; // "float" is a keyward, cannot use it here.
+using floating       = double; // "float" is a keyword, cannot use it here.
 // the following stuffs are structs defined here, so aliases are not needed.
 // - string
 // - offset_datetime
@@ -32,12 +37,26 @@ using floating       = double; // "float" is a keyward, cannot use it here.
 // - local_date
 // - local_time
 
+#if defined(__GNUC__) && !defined(__clang__)
+#  pragma GCC diagnostic pop
+#endif
+
 // default toml::value and default array/table. these are defined after defining
 // basic_value itself.
 // using value = basic_value<discard_comments, std::unordered_map, std::vector>;
 // using array = typename value::array_type;
 // using table = typename value::table_type;
 
+// to avoid warnings about `value_t::integer` is "shadowing" toml::integer in
+// GCC -Wshadow=global.
+#if defined(__GNUC__) && !defined(__clang__)
+#  pragma GCC diagnostic push
+#  if 7 <= __GNUC__
+#    pragma GCC diagnostic ignored "-Wshadow=global"
+#  else // gcc-6 or older
+#    pragma GCC diagnostic ignored "-Wshadow"
+#  endif
+#endif
 enum class value_t : std::uint8_t
 {
     empty           =  0,
@@ -52,6 +71,9 @@ enum class value_t : std::uint8_t
     array           =  9,
     table           = 10,
 };
+#if defined(__GNUC__) && !defined(__clang__)
+#  pragma GCC diagnostic pop
+#endif
 
 template<typename charT, typename traits>
 inline std::basic_ostream<charT, traits>&
@@ -147,4 +169,5 @@ template<typename T, typename V> struct is_exact_toml_type<T const volatile&, V>
 
 } // detail
 } // toml
+
 #endif// TOML11_TYPES_H

third_party/toml11-3.8.1/toml/utility.hpp

@@ -7,8 +7,9 @@
 #include <utility>
 
 #include "traits.hpp"
+#include "version.hpp"
 
-#if __cplusplus >= 201402L
+#if TOML11_CPLUSPLUS_STANDARD_VERSION >= 201402L
 #  define TOML11_MARK_AS_DEPRECATED(msg) [[deprecated(msg)]]
 #elif defined(__GNUC__)
 #  define TOML11_MARK_AS_DEPRECATED(msg) __attribute__((deprecated(msg)))
@@ -21,7 +22,7 @@
 namespace toml
 {
 
-#if __cplusplus >= 201402L
+#if TOML11_CPLUSPLUS_STANDARD_VERSION >= 201402L
 
 using std::make_unique;
 
@@ -33,7 +34,7 @@ inline std::unique_ptr<T> make_unique(Ts&& ... args)
     return std::unique_ptr<T>(new T(std::forward<Ts>(args)...));
 }
 
-#endif // __cplusplus >= 2014
+#endif // TOML11_CPLUSPLUS_STANDARD_VERSION >= 2014
 
 namespace detail
 {
@@ -89,5 +90,61 @@ T from_string(const std::string& str, T opt)
     return v;
 }
 
+namespace detail
+{
+#if TOML11_CPLUSPLUS_STANDARD_VERSION >= 201402L
+template<typename T>
+decltype(auto) last_one(T&& tail) noexcept
+{
+    return std::forward<T>(tail);
+}
+
+template<typename T, typename ... Ts>
+decltype(auto) last_one(T&& /*head*/, Ts&& ... tail) noexcept
+{
+    return last_one(std::forward<Ts>(tail)...);
+}
+#else // C++11
+// The following code
+// ```cpp
+//  1 | template<typename T, typename ... Ts>
+//  2 | auto last_one(T&& /*head*/, Ts&& ... tail)
+//  3 |  -> decltype(last_one(std::forward<Ts>(tail)...))
+//  4 | {
+//  5 |     return last_one(std::forward<Ts>(tail)...);
+//  6 | }
+// ```
+// does not work because the function `last_one(...)` is not yet defined at
+// line #3, so `decltype()` cannot deduce the type returned from `last_one`.
+// So we need to determine return type in a different way, like a meta func.
+
+template<typename T, typename ... Ts>
+struct last_one_in_pack
+{
+    using type = typename last_one_in_pack<Ts...>::type;
+};
+template<typename T>
+struct last_one_in_pack<T>
+{
+    using type = T;
+};
+template<typename ... Ts>
+using last_one_in_pack_t = typename last_one_in_pack<Ts...>::type;
+
+template<typename T>
+T&& last_one(T&& tail) noexcept
+{
+    return std::forward<T>(tail);
+}
+template<typename T, typename ... Ts>
+enable_if_t<(sizeof...(Ts) > 0), last_one_in_pack_t<Ts&& ...>>
+last_one(T&& /*head*/, Ts&& ... tail)
+{
+    return last_one(std::forward<Ts>(tail)...);
+}
+
+#endif
+} // detail
+
 }// toml
 #endif // TOML11_UTILITY

third_party/toml11-3.8.1/toml/value.hpp

@@ -66,9 +66,20 @@ throw_key_not_found_error(const Value& v, const key& ky)
     // ```
     // It actually points to the top-level table at the first character,
     // not `[table]`. But it is too confusing. To avoid the confusion, the error
-    // message should explicitly say "key not found in the top-level table".
+    // message should explicitly say "key not found in the top-level table",
+    // or "the parsed file is empty" if there is no content at all (0 bytes in file).
     const auto loc = v.location();
-    if(loc.line() == 1 && loc.region() == 1)
+    if(loc.line() == 1 && loc.region() == 0)
+    {
+        // First line with a zero-length region means "empty file".
+        // The region will be generated at `parse_toml_file` function
+        // if the file contains no bytes.
+        throw std::out_of_range(format_underline(concat_to_string(
+            "key \"", ky, "\" not found in the top-level table"), {
+                {loc, "the parsed file is empty"}
+            }));
+    }
+    else if(loc.line() == 1 && loc.region() == 1)
     {
         // Here it assumes that top-level table starts at the first character.
         // The region corresponds to the top-level table will be generated at
@@ -90,7 +101,7 @@ throw_key_not_found_error(const Value& v, const key& ky)
         // ```toml
         // a = {b = "c"}
         // ```
-        // toml11 consideres the inline table body as the table region. Here,
+        // toml11 considers the inline table body as the table region. Here,
         // `{b = "c"}` is the region of the table "a". The size of the region
         // is 9, not 1. The shotest inline table still has two characters, `{`
         // and `}`. The size cannot be 1.
@@ -99,7 +110,7 @@ throw_key_not_found_error(const Value& v, const key& ky)
         // ```toml
         // [a]
         // ```
-        // toml11 consideres the whole table key as the table region. Here,
+        // toml11 considers the whole table key as the table region. Here,
         // `[a]` is the table region. The size is 3, not 1.
         //
         throw std::out_of_range(format_underline(concat_to_string(
@@ -236,6 +247,7 @@ class basic_value
     }
     basic_value& operator=(const basic_value& v)
     {
+        if(this == std::addressof(v)) {return *this;}
         this->cleanup();
         this->region_info_ = v.region_info_;
         this->comments_ = v.comments_;
@@ -258,6 +270,7 @@ class basic_value
     }
     basic_value& operator=(basic_value&& v)
     {
+        if(this == std::addressof(v)) {return *this;}
         this->cleanup();
         this->region_info_ = std::move(v.region_info_);
         this->comments_ = std::move(v.comments_);
@@ -281,9 +294,9 @@ class basic_value
 
     // overwrite comments ----------------------------------------------------
 
-    basic_value(const basic_value& v, std::vector<std::string> comments)
+    basic_value(const basic_value& v, std::vector<std::string> com)
         : type_(v.type()), region_info_(v.region_info_),
-          comments_(std::move(comments))
+          comments_(std::move(com))
     {
         switch(v.type())
         {
@@ -301,9 +314,9 @@ class basic_value
         }
     }
 
-    basic_value(basic_value&& v, std::vector<std::string> comments)
+    basic_value(basic_value&& v, std::vector<std::string> com)
         : type_(v.type()), region_info_(std::move(v.region_info_)),
-          comments_(std::move(comments))
+          comments_(std::move(com))
     {
         switch(this->type_) // here this->type_ is already initialized
         {
@@ -359,9 +372,9 @@ class basic_value
     template<typename C,
              template<typename ...> class T,
              template<typename ...> class A>
-    basic_value(const basic_value<C, T, A>& v, std::vector<std::string> comments)
+    basic_value(const basic_value<C, T, A>& v, std::vector<std::string> com)
         : type_(v.type()), region_info_(v.region_info_),
-          comments_(std::move(comments))
+          comments_(std::move(com))
     {
         switch(v.type())
         {
@@ -443,10 +456,10 @@ class basic_value
         assigner(this->boolean_, b);
         return *this;
     }
-    basic_value(boolean b, std::vector<std::string> comments)
+    basic_value(boolean b, std::vector<std::string> com)
         : type_(value_t::boolean),
           region_info_(std::make_shared<region_base>(region_base{})),
-          comments_(std::move(comments))
+          comments_(std::move(com))
     {
         assigner(this->boolean_, b);
     }
@@ -478,10 +491,10 @@ class basic_value
     template<typename T, typename std::enable_if<detail::conjunction<
         std::is_integral<T>, detail::negation<std::is_same<T, boolean>>>::value,
         std::nullptr_t>::type = nullptr>
-    basic_value(T i, std::vector<std::string> comments)
+    basic_value(T i, std::vector<std::string> com)
         : type_(value_t::integer),
           region_info_(std::make_shared<region_base>(region_base{})),
-          comments_(std::move(comments))
+          comments_(std::move(com))
     {
         assigner(this->integer_, static_cast<integer>(i));
     }
@@ -511,10 +524,10 @@ class basic_value
 
     template<typename T, typename std::enable_if<
         std::is_floating_point<T>::value, std::nullptr_t>::type = nullptr>
-    basic_value(T f, std::vector<std::string> comments)
+    basic_value(T f, std::vector<std::string> com)
         : type_(value_t::floating),
           region_info_(std::make_shared<region_base>(region_base{})),
-          comments_(std::move(comments))
+          comments_(std::move(com))
     {
         assigner(this->floating_, f);
     }
@@ -535,10 +548,10 @@ class basic_value
         assigner(this->string_, s);
         return *this;
     }
-    basic_value(toml::string s, std::vector<std::string> comments)
+    basic_value(toml::string s, std::vector<std::string> com)
         : type_(value_t::string),
           region_info_(std::make_shared<region_base>(region_base{})),
-          comments_(std::move(comments))
+          comments_(std::move(com))
     {
         assigner(this->string_, std::move(s));
     }
@@ -563,17 +576,17 @@ class basic_value
     {
         assigner(this->string_, toml::string(std::move(s), kind));
     }
-    basic_value(std::string s, std::vector<std::string> comments)
+    basic_value(std::string s, std::vector<std::string> com)
         : type_(value_t::string),
           region_info_(std::make_shared<region_base>(region_base{})),
-          comments_(std::move(comments))
+          comments_(std::move(com))
     {
         assigner(this->string_, toml::string(std::move(s)));
     }
-    basic_value(std::string s, string_t kind, std::vector<std::string> comments)
+    basic_value(std::string s, string_t kind, std::vector<std::string> com)
         : type_(value_t::string),
           region_info_(std::make_shared<region_base>(region_base{})),
-          comments_(std::move(comments))
+          comments_(std::move(com))
     {
         assigner(this->string_, toml::string(std::move(s), kind));
     }
@@ -598,22 +611,22 @@ class basic_value
     {
         assigner(this->string_, toml::string(std::string(s), kind));
     }
-    basic_value(const char* s, std::vector<std::string> comments)
+    basic_value(const char* s, std::vector<std::string> com)
         : type_(value_t::string),
           region_info_(std::make_shared<region_base>(region_base{})),
-          comments_(std::move(comments))
+          comments_(std::move(com))
     {
         assigner(this->string_, toml::string(std::string(s)));
     }
-    basic_value(const char* s, string_t kind, std::vector<std::string> comments)
+    basic_value(const char* s, string_t kind, std::vector<std::string> com)
         : type_(value_t::string),
           region_info_(std::make_shared<region_base>(region_base{})),
-          comments_(std::move(comments))
+          comments_(std::move(com))
     {
         assigner(this->string_, toml::string(std::string(s), kind));
     }
 
-#if __cplusplus >= 201703L
+#if defined(TOML11_USING_STRING_VIEW) && TOML11_USING_STRING_VIEW>0
     basic_value(std::string_view s)
         : type_(value_t::string),
           region_info_(std::make_shared<region_base>(region_base{}))
@@ -628,10 +641,10 @@ class basic_value
         assigner(this->string_, toml::string(s));
         return *this;
     }
-    basic_value(std::string_view s, std::vector<std::string> comments)
+    basic_value(std::string_view s, std::vector<std::string> com)
         : type_(value_t::string),
           region_info_(std::make_shared<region_base>(region_base{})),
-          comments_(std::move(comments))
+          comments_(std::move(com))
     {
         assigner(this->string_, toml::string(s));
     }
@@ -641,10 +654,10 @@ class basic_value
     {
         assigner(this->string_, toml::string(s, kind));
     }
-    basic_value(std::string_view s, string_t kind, std::vector<std::string> comments)
+    basic_value(std::string_view s, string_t kind, std::vector<std::string> com)
         : type_(value_t::string),
           region_info_(std::make_shared<region_base>(region_base{})),
-          comments_(std::move(comments))
+          comments_(std::move(com))
     {
         assigner(this->string_, toml::string(s, kind));
     }
@@ -666,10 +679,10 @@ class basic_value
         assigner(this->local_date_, ld);
         return *this;
     }
-    basic_value(const local_date& ld, std::vector<std::string> comments)
+    basic_value(const local_date& ld, std::vector<std::string> com)
         : type_(value_t::local_date),
           region_info_(std::make_shared<region_base>(region_base{})),
-          comments_(std::move(comments))
+          comments_(std::move(com))
     {
         assigner(this->local_date_, ld);
     }
@@ -682,10 +695,10 @@ class basic_value
     {
         assigner(this->local_time_, lt);
     }
-    basic_value(const local_time& lt, std::vector<std::string> comments)
+    basic_value(const local_time& lt, std::vector<std::string> com)
         : type_(value_t::local_time),
           region_info_(std::make_shared<region_base>(region_base{})),
-          comments_(std::move(comments))
+          comments_(std::move(com))
     {
         assigner(this->local_time_, lt);
     }
@@ -707,10 +720,10 @@ class basic_value
     }
     template<typename Rep, typename Period>
     basic_value(const std::chrono::duration<Rep, Period>& dur,
-                std::vector<std::string> comments)
+                std::vector<std::string> com)
         : type_(value_t::local_time),
           region_info_(std::make_shared<region_base>(region_base{})),
-          comments_(std::move(comments))
+          comments_(std::move(com))
     {
         assigner(this->local_time_, local_time(dur));
     }
@@ -732,10 +745,10 @@ class basic_value
     {
         assigner(this->local_datetime_, ldt);
     }
-    basic_value(const local_datetime& ldt, std::vector<std::string> comments)
+    basic_value(const local_datetime& ldt, std::vector<std::string> com)
         : type_(value_t::local_datetime),
           region_info_(std::make_shared<region_base>(region_base{})),
-          comments_(std::move(comments))
+          comments_(std::move(com))
     {
         assigner(this->local_datetime_, ldt);
     }
@@ -756,10 +769,10 @@ class basic_value
     {
         assigner(this->offset_datetime_, odt);
     }
-    basic_value(const offset_datetime& odt, std::vector<std::string> comments)
+    basic_value(const offset_datetime& odt, std::vector<std::string> com)
         : type_(value_t::offset_datetime),
           region_info_(std::make_shared<region_base>(region_base{})),
-          comments_(std::move(comments))
+          comments_(std::move(com))
     {
         assigner(this->offset_datetime_, odt);
     }
@@ -778,10 +791,10 @@ class basic_value
         assigner(this->offset_datetime_, offset_datetime(tp));
     }
     basic_value(const std::chrono::system_clock::time_point& tp,
-                std::vector<std::string> comments)
+                std::vector<std::string> com)
         : type_(value_t::offset_datetime),
           region_info_(std::make_shared<region_base>(region_base{})),
-          comments_(std::move(comments))
+          comments_(std::move(com))
     {
         assigner(this->offset_datetime_, offset_datetime(tp));
     }
@@ -802,10 +815,10 @@ class basic_value
     {
         assigner(this->array_, ary);
     }
-    basic_value(const array_type& ary, std::vector<std::string> comments)
+    basic_value(const array_type& ary, std::vector<std::string> com)
         : type_(value_t::array),
           region_info_(std::make_shared<region_base>(region_base{})),
-          comments_(std::move(comments))
+          comments_(std::move(com))
     {
         assigner(this->array_, ary);
     }
@@ -833,10 +846,10 @@ class basic_value
     template<typename T, typename std::enable_if<
             std::is_convertible<T, value_type>::value,
         std::nullptr_t>::type = nullptr>
-    basic_value(std::initializer_list<T> list, std::vector<std::string> comments)
+    basic_value(std::initializer_list<T> list, std::vector<std::string> com)
         : type_(value_t::array),
           region_info_(std::make_shared<region_base>(region_base{})),
-          comments_(std::move(comments))
+          comments_(std::move(com))
     {
         array_type ary(list.begin(), list.end());
         assigner(this->array_, std::move(ary));
@@ -876,10 +889,10 @@ class basic_value
             detail::negation<std::is_same<T, array_type>>,
             detail::is_container<T>
         >::value, std::nullptr_t>::type = nullptr>
-    basic_value(const T& list, std::vector<std::string> comments)
+    basic_value(const T& list, std::vector<std::string> com)
         : type_(value_t::array),
           region_info_(std::make_shared<region_base>(region_base{})),
-          comments_(std::move(comments))
+          comments_(std::move(com))
     {
         static_assert(std::is_convertible<typename T::value_type, value_type>::value,
             "elements of a container should be convertible to toml::value");
@@ -915,10 +928,10 @@ class basic_value
     {
         assigner(this->table_, tab);
     }
-    basic_value(const table_type& tab, std::vector<std::string> comments)
+    basic_value(const table_type& tab, std::vector<std::string> com)
         : type_(value_t::table),
           region_info_(std::make_shared<region_base>(region_base{})),
-          comments_(std::move(comments))
+          comments_(std::move(com))
     {
         assigner(this->table_, tab);
     }
@@ -943,10 +956,10 @@ class basic_value
     }
 
     basic_value(std::initializer_list<std::pair<key, basic_value>> list,
-                std::vector<std::string> comments)
+                std::vector<std::string> com)
         : type_(value_t::table),
           region_info_(std::make_shared<region_base>(region_base{})),
-          comments_(std::move(comments))
+          comments_(std::move(com))
     {
         table_type tab;
         for(const auto& elem : list) {tab[elem.first] = elem.second;}
@@ -982,10 +995,10 @@ class basic_value
             detail::negation<std::is_same<Map, table_type>>,
             detail::is_map<Map>
         >::value, std::nullptr_t>::type = nullptr>
-    basic_value(const Map& mp, std::vector<std::string> comments)
+    basic_value(const Map& mp, std::vector<std::string> com)
         : type_(value_t::table),
           region_info_(std::make_shared<region_base>(region_base{})),
-          comments_(std::move(comments))
+          comments_(std::move(com))
     {
         table_type tab;
         for(const auto& elem : mp) {tab[elem.first] = elem.second;}
@@ -1017,8 +1030,8 @@ class basic_value
 
     template<typename T, typename std::enable_if<
         detail::has_into_toml_method<T>::value, std::nullptr_t>::type = nullptr>
-    basic_value(const T& ud, std::vector<std::string> comments)
+    basic_value(const T& ud, std::vector<std::string> com)
-        : basic_value(ud.into_toml(), std::move(comments))
+        : basic_value(ud.into_toml(), std::move(com))
     {}
     template<typename T, typename std::enable_if<
         detail::has_into_toml_method<T>::value, std::nullptr_t>::type = nullptr>
@@ -1033,8 +1046,8 @@ class basic_value
     template<typename T, std::size_t S = sizeof(::toml::into<T>)>
     basic_value(const T& ud): basic_value(::toml::into<T>::into_toml(ud)) {}
     template<typename T, std::size_t S = sizeof(::toml::into<T>)>
-    basic_value(const T& ud, std::vector<std::string> comments)
+    basic_value(const T& ud, std::vector<std::string> com)
-        : basic_value(::toml::into<T>::into_toml(ud), std::move(comments))
+        : basic_value(::toml::into<T>::into_toml(ud), std::move(com))
     {}
     template<typename T, std::size_t S = sizeof(::toml::into<T>)>
     basic_value& operator=(const T& ud)
@@ -1047,10 +1060,10 @@ class basic_value
     //
     // Those constructors take detail::region that contains parse result.
 
-    basic_value(boolean b, detail::region reg)
+    basic_value(boolean b, detail::region reg, std::vector<std::string> cm)
         : type_(value_t::boolean),
           region_info_(std::make_shared<detail::region>(std::move(reg))),
-          comments_(region_info_->comments())
+          comments_(std::move(cm))
     {
         assigner(this->boolean_, b);
     }
@@ -1058,68 +1071,75 @@ class basic_value
         detail::conjunction<
             std::is_integral<T>, detail::negation<std::is_same<T, boolean>>
         >::value, std::nullptr_t>::type = nullptr>
-    basic_value(T i, detail::region reg)
+    basic_value(T i, detail::region reg, std::vector<std::string> cm)
         : type_(value_t::integer),
           region_info_(std::make_shared<detail::region>(std::move(reg))),
-          comments_(region_info_->comments())
+          comments_(std::move(cm))
     {
         assigner(this->integer_, static_cast<integer>(i));
     }
     template<typename T, typename std::enable_if<
         std::is_floating_point<T>::value, std::nullptr_t>::type = nullptr>
-    basic_value(T f, detail::region reg)
+    basic_value(T f, detail::region reg, std::vector<std::string> cm)
         : type_(value_t::floating),
           region_info_(std::make_shared<detail::region>(std::move(reg))),
-          comments_(region_info_->comments())
+          comments_(std::move(cm))
     {
         assigner(this->floating_, static_cast<floating>(f));
     }
-    basic_value(toml::string s, detail::region reg)
+    basic_value(toml::string s, detail::region reg,
+                std::vector<std::string> cm)
         : type_(value_t::string),
           region_info_(std::make_shared<detail::region>(std::move(reg))),
-          comments_(region_info_->comments())
+          comments_(std::move(cm))
     {
         assigner(this->string_, std::move(s));
     }
-    basic_value(const local_date& ld, detail::region reg)
+    basic_value(const local_date& ld, detail::region reg,
+                std::vector<std::string> cm)
         : type_(value_t::local_date),
           region_info_(std::make_shared<detail::region>(std::move(reg))),
-          comments_(region_info_->comments())
+          comments_(std::move(cm))
     {
         assigner(this->local_date_, ld);
     }
-    basic_value(const local_time& lt, detail::region reg)
+    basic_value(const local_time& lt, detail::region reg,
+                std::vector<std::string> cm)
         : type_(value_t::local_time),
           region_info_(std::make_shared<detail::region>(std::move(reg))),
-          comments_(region_info_->comments())
+          comments_(std::move(cm))
     {
         assigner(this->local_time_, lt);
     }
-    basic_value(const local_datetime& ldt, detail::region reg)
+    basic_value(const local_datetime& ldt, detail::region reg,
+                std::vector<std::string> cm)
         : type_(value_t::local_datetime),
           region_info_(std::make_shared<detail::region>(std::move(reg))),
-          comments_(region_info_->comments())
+          comments_(std::move(cm))
     {
         assigner(this->local_datetime_, ldt);
     }
-    basic_value(const offset_datetime& odt, detail::region reg)
+    basic_value(const offset_datetime& odt, detail::region reg,
+                std::vector<std::string> cm)
         : type_(value_t::offset_datetime),
           region_info_(std::make_shared<detail::region>(std::move(reg))),
-          comments_(region_info_->comments())
+          comments_(std::move(cm))
     {
         assigner(this->offset_datetime_, odt);
     }
-    basic_value(const array_type& ary, detail::region reg)
+    basic_value(const array_type& ary, detail::region reg,
+                std::vector<std::string> cm)
         : type_(value_t::array),
           region_info_(std::make_shared<detail::region>(std::move(reg))),
-          comments_(region_info_->comments())
+          comments_(std::move(cm))
     {
         assigner(this->array_, ary);
     }
-    basic_value(const table_type& tab, detail::region reg)
+    basic_value(const table_type& tab, detail::region reg,
+                std::vector<std::string> cm)
         : type_(value_t::table),
           region_info_(std::make_shared<detail::region>(std::move(reg))),
-          comments_(region_info_->comments())
+          comments_(std::move(cm))
     {
         assigner(this->table_, tab);
     }
@@ -1127,8 +1147,10 @@ class basic_value
     template<typename T, typename std::enable_if<
         detail::is_exact_toml_type<T, value_type>::value,
         std::nullptr_t>::type = nullptr>
-    basic_value(std::pair<T, detail::region> parse_result)
+    basic_value(std::pair<T, detail::region> parse_result, std::vector<std::string> com)
-        : basic_value(std::move(parse_result.first), std::move(parse_result.second))
+        : basic_value(std::move(parse_result.first),
+                      std::move(parse_result.second),
+                      std::move(com))
     {}
 
     // type checking and casting ============================================
@@ -1692,9 +1714,9 @@ class basic_value
     {
         switch(this->type_)
         {
-            case value_t::string  : {string_.~string();       return;}
+            case value_t::string : {string_.~string();       return;}
-            case value_t::array   : {array_.~array_storage(); return;}
+            case value_t::array  : {array_.~array_storage(); return;}
-            case value_t::table   : {table_.~table_storage(); return;}
+            case value_t::table  : {table_.~table_storage(); return;}
             default              : return;
         }
     }
@@ -1730,7 +1752,8 @@ class basic_value
 };
 
 // default toml::value and default array/table.
-using value = basic_value<discard_comments, std::unordered_map, std::vector>;
+// TOML11_DEFAULT_COMMENT_STRATEGY is defined in comments.hpp
+using value = basic_value<TOML11_DEFAULT_COMMENT_STRATEGY, std::unordered_map, std::vector>;
 using array = typename value::array_type;
 using table = typename value::table_type;
 

third_party/toml11-3.8.1/toml/version.hpp

@@ -0,0 +1,42 @@
+#ifndef TOML11_VERSION_HPP
+#define TOML11_VERSION_HPP
+
+// This file checks C++ version.
+
+#ifndef __cplusplus
+#    error "__cplusplus is not defined"
+#endif
+
+// Since MSVC does not define `__cplusplus` correctly unless you pass
+// `/Zc:__cplusplus` when compiling, the workaround macros are added.
+// Those enables you to define version manually or to use MSVC specific
+// version macro automatically.
+//
+// The value of `__cplusplus` macro is defined in the C++ standard spec, but
+// MSVC ignores the value, maybe because of backward compatibility. Instead,
+// MSVC defines _MSVC_LANG that has the same value as __cplusplus defined in
+// the C++ standard. First we check the manual version definition, and then
+// we check if _MSVC_LANG is defined. If neither, use normal `__cplusplus`.
+//
+// FYI: https://docs.microsoft.com/en-us/cpp/build/reference/zc-cplusplus?view=msvc-170
+//      https://docs.microsoft.com/en-us/cpp/preprocessor/predefined-macros?view=msvc-170
+//
+#if   defined(TOML11_ENFORCE_CXX11)
+#  define TOML11_CPLUSPLUS_STANDARD_VERSION 201103L
+#elif defined(TOML11_ENFORCE_CXX14)
+#  define TOML11_CPLUSPLUS_STANDARD_VERSION 201402L
+#elif defined(TOML11_ENFORCE_CXX17)
+#  define TOML11_CPLUSPLUS_STANDARD_VERSION 201703L
+#elif defined(TOML11_ENFORCE_CXX20)
+#  define TOML11_CPLUSPLUS_STANDARD_VERSION 202002L
+#elif defined(_MSVC_LANG) && defined(_MSC_VER) && 1910 <= _MSC_VER
+#  define TOML11_CPLUSPLUS_STANDARD_VERSION _MSVC_LANG
+#else
+#  define TOML11_CPLUSPLUS_STANDARD_VERSION __cplusplus
+#endif
+
+#if TOML11_CPLUSPLUS_STANDARD_VERSION < 201103L && _MSC_VER < 1900
+#    error "toml11 requires C++11 or later."
+#endif
+
+#endif// TOML11_VERSION_HPP