[RISC-V Vector]Add 128-bit fixed-width SIMD layer (#2472)

* Fix riscv intrinsics header missing SIMDJSON_CONDITIONAL_INCLUDE guard

Co-authored-by: gong-flying <gongxiaofei24@iscas.ac.cn>

* Fix riscv intrinsics header missing SIMDJSON_CONDITIONAL_INCLUDE guard

Co-authored-by: gong-flying <gongxiaofei24@iscas.ac.cn>

* Implement simd8/simd8x64 with RVV intrinsics and fallback bitmanipulation

Co-authored-by: gong-flying <gongxiaofei24@iscas.ac.cn>

* Fix missing SIMDJSON_CONDITIONAL_INCLUDE guard

Co-authored-by: gong-flying <gongxiaofei24@iscas.ac.cn>

* Fix missing SIMDJSON_CONDITIONAL_INCLUDE guard

Co-authored-by: gong-flying <gongxiaofei24@iscas.ac.cn>

---------

Co-authored-by: gong-flying <gongxiaofei24@iscas.ac.cn>

.github/workflows/ubuntu24-noexcept.yml

@@ -31,4 +31,4 @@ jobs:
           echo -e '#include <simdjson.h>\nint main(int argc,char**argv) {simdjson::dom::parser parser;simdjson::dom::element tweets = parser.load(argv[1]); }' > tmp.cpp && c++ -Idestination/include -Ldestination/lib -std=c++17 -Wl,-rpath,destination/lib -o linkandrun tmp.cpp -lsimdjson && ./linkandrun jsonexamples/twitter.json &&
           mkdir testfindpackage &&
           cd testfindpackage &&
-          echo -e 'cmake_minimum_required(VERSION 3.14)\nproject(simdjsontester)\nset(CMAKE_CXX_STANDARD 17)\nfind_package(simdjson REQUIRED)'> CMakeLists.txt && mkdir build && cd build && cmake -DCMAKE_INSTALL_PREFIX:PATH=../destination .. &&  cmake --build .
+          echo -e 'cmake_minimum_required(VERSION 3.1)\nproject(simdjsontester)\nset(CMAKE_CXX_STANDARD 17)\nfind_package(simdjson REQUIRED)'> CMakeLists.txt && mkdir build && cd build && cmake -DCMAKE_INSTALL_PREFIX:PATH=../destination .. &&  cmake --build .

.github/workflows/ubuntu24-nothread.yml

@@ -31,4 +31,4 @@ jobs:
           echo -e '#include <simdjson.h>\nint main(int argc,char**argv) {simdjson::dom::parser parser;simdjson::dom::element tweets = parser.load(argv[1]); }' > tmp.cpp && c++ -Idestination/include -Ldestination/lib -std=c++17 -Wl,-rpath,destination/lib -o linkandrun tmp.cpp -lsimdjson && ./linkandrun jsonexamples/twitter.json &&
           mkdir testfindpackage &&
           cd testfindpackage &&
-          echo -e 'cmake_minimum_required(VERSION 3.14)\nproject(simdjsontester)\nset(CMAKE_CXX_STANDARD 17)\nfind_package(simdjson REQUIRED)'> CMakeLists.txt && mkdir build && cd build && cmake -DCMAKE_INSTALL_PREFIX:PATH=../destination .. &&  cmake --build .
+          echo -e 'cmake_minimum_required(VERSION 3.1)\nproject(simdjsontester)\nset(CMAKE_CXX_STANDARD 17)\nfind_package(simdjson REQUIRED)'> CMakeLists.txt && mkdir build && cd build && cmake -DCMAKE_INSTALL_PREFIX:PATH=../destination .. &&  cmake --build .

.gitignore

@@ -88,6 +88,7 @@ objs
 # Build outputs
 /build*/
 /visual_studio/
+/originbuild/
 
 # Fuzzer outputs generated by instructions in fuzz/Fuzzing.md
 /corpus.zip

CMakeLists.txt

@@ -3,7 +3,7 @@ cmake_minimum_required(VERSION 3.14)
 project(
     simdjson
     # The version number is modified by tools/release.py
-    VERSION 4.0.6
+    VERSION 4.0.2
     DESCRIPTION "Parsing gigabytes of JSON per second"
     HOMEPAGE_URL "https://simdjson.org/"
     LANGUAGES CXX C

Doxyfile

@@ -38,7 +38,7 @@ PROJECT_NAME           = simdjson
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = "4.0.6"
+PROJECT_NUMBER         = "4.0.2"
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description
 # for a project that appears at the top of each page and should give viewer a

README.md

@@ -62,7 +62,6 @@ Real-world usage
 - [WasmEdge](https://wasmedge.org)
 - [RonDB](https://github.com/logicalclocks/rondb)
 - [GreptimeDB](https://github.com/GreptimeTeam/greptimedb)
-- [mamba](https://github.com/mamba-org/mamba)
 
 
 If you are planning to use simdjson in a product, please work from one of our releases.
@@ -118,9 +117,9 @@ Godbolt
 -------------
 
 Some users may want to browse code along with the compiled assembly. You want to check out the following lists of examples:
-* [C++26 reflection example](https://godbolt.org/z/K3Px64TqK)
 * [simdjson examples with errors handled through exceptions](https://godbolt.org/z/7G5qE4sr9)
 * [simdjson examples with errors without exceptions](https://godbolt.org/z/e9dWb9E4v)
+* [C++26 reflection example](https://godbolt.org/z/xK5TGKdPb)
 
 Performance results
 -------------------

benchmark/static_reflect/CMakeLists.txt

@@ -6,27 +6,26 @@ CPMAddPackage(
   EXCLUDE_FROM_ALL YES
 )
 
-option(SIMDJSON_USE_RUST "Build the static_reflect benchmark" OFF)
 
-if(SIMDJSON_USER_RUST)
+
-  if(NOT WIN32)
+if(NOT WIN32)
-  # We want the check whether Rust is available before trying to build a crate.
+# We want the check whether Rust is available before trying to build a crate.
-  CPMAddPackage(
+CPMAddPackage(
   NAME corrosion
   GITHUB_REPOSITORY corrosion-rs/corrosion
   VERSION 0.4.4
   DOWNLOAD_ONLY ON
   OPTIONS "Rust_FIND_QUIETLY OFF"
-  )
+)
-  include("${corrosion_SOURCE_DIR}/cmake/FindRust.cmake")
+include("${corrosion_SOURCE_DIR}/cmake/FindRust.cmake")
-  endif()
+endif()
 
-  if(RUST_FOUND)
+if(RUST_FOUND)
   message(STATUS "Rust found: " ${Rust_VERSION} )
   add_subdirectory("${corrosion_SOURCE_DIR}" "${PROJECT_BINARY_DIR}/_deps/corrosion" EXCLUDE_FROM_ALL)
   # Important: we want to build in release mode!
   corrosion_import_crate(MANIFEST_PATH "serde-benchmark/Cargo.toml" NO_LINKER_OVERRIDE PROFILE release)
-  else()
+else()
   message(STATUS "Rust/Cargo is unavailable." )
   message(STATUS "We will not benchmark serde-benchmark." )
   if (${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
@@ -38,10 +37,7 @@ if(SIMDJSON_USER_RUST)
     message(STATUS "or" )
     message(STATUS "curl https://sh.rustup.rs -sSf | sh")
   endif()
-  endif()
+endif()
-else(SIMDJSON_USER_RUST)
-  message(STATUS "We will not benchmark serde-benchmark." )
-endif(SIMDJSON_USER_RUST)
 
 # Add the benchmark executable targets
 add_subdirectory(twitter_benchmark)

cmake/developer-options.cmake

@@ -174,10 +174,6 @@ else()
       -Werror -Wall -Wextra -Weffc++ -Wsign-compare -Wshadow -Wwrite-strings
       -Wpointer-arith -Winit-self -Wconversion -Wno-sign-conversion
   )
-  if(CMAKE_CXX_STANDARD VERSION_GREATER_EQUAL 20)
-    target_compile_options(simdjson-internal-flags INTERFACE -Wctad-maybe-unsupported)
-  endif()
-
 endif()
 
 option(SIMDJSON_GLIBCXX_ASSERTIONS "Set _GLIBCXX_ASSERTIONS" OFF)

cmake/implementation-flags.cmake

@@ -1,7 +1,7 @@
 #
 # Implementation selection
 #
-set(SIMDJSON_ALL_IMPLEMENTATIONS fallback westmere haswell icelake arm64 ppc64)
+set(SIMDJSON_ALL_IMPLEMENTATIONS fallback westmere haswell icelake arm64 ppc64 rvv)
 
 set(
     SIMDJSON_IMPLEMENTATION ""
@@ -15,7 +15,7 @@ set(
     SIMDJSON_EXCLUDE_IMPLEMENTATION ""
     CACHE STRING "\
 Semicolon-separated list of implementations to exclude \
-(icelake/haswell/westmere/arm64/ppc64/fallback). By default, excludes any \
+(icelake/haswell/westmere/arm64/ppc64/rvv/fallback). By default, excludes any \
 implementations that are unsupported at compile time or cannot be selected at \
 runtime."
 )

doc/basics.md

@@ -1395,14 +1395,11 @@ Car c = doc.get<Car>();
 
 We try to automate the parsing of any given structure or class
 by looking at its non-static public members. At compile-time,
-the library looks at a simple structure like `Car` and
+the library looks at a simple structre like `Car` and
 maps it to parsing code. We call the default constructor,
 and then assign values to the public members.
 
 
-If a key is missing in the JSON document, an error is generated (`NO_SUCH_FIELD`),
-except if the attribute is of a type like `std::optional` (`simdjson::concepts::optional_type`).
-
 #### Special cases
 
 However, there are instances where the construction cannot
@@ -1453,7 +1450,7 @@ struct complicated_weather_data {
 };
 ```
 
-The code might be as simple as the following.
+The code might as simple as the following.
 
 ```cpp
 auto padded = R"({"time":["2023-03-15T12:00:00Z"],"temperature":[42]})"_padded;
@@ -1480,12 +1477,6 @@ type without a document instance like so:
 Car car = simdjson::from(json);
 ```
 
-You can also use the `simdjson::from` syntax without exceptions, like so:
-```cpp
-Car car;
-simdjson::error_code err = simdjson::from(json_car).get(car);
-```
-
 You can also use the `simdjson::from` syntax to iterate over an array.
 
 ```cpp

doc/builder.md

@@ -34,15 +34,14 @@ It has the following methods to add content to the string:
 - `append_null()`: Appends the string "null" to the JSON buffer.
 - `clear()`: Clears the contents of the JSON buffer, resetting the position to 0 while retaining the allocated capacity.
 - `escape_and_append(std::string_view input)`: Appends a string view to the JSON buffer after escaping special characters (e.g., quotes, backslashes) as required by JSON.
-- `escape_and_append_with_quotes(std::string_view input)` Appends a string view surrounded by double quotes (e.g., "input") to the JSON buffer after escaping special characters. For constant strings, you may also do `escape_and_append_with_quotes<"mystring">()`.
+- `escape_and_append_with_quotes(std::string_view input)` Appends a string view surrounded by double quotes (e.g., "input") to the JSON buffer after escaping special characters.
+Parameters:
 - `escape_and_append_with_quotes(char input)`: Appends a single character surrounded by double quotes (e.g., "c") to the JSON buffer after escaping it if necessary.
 - `append_raw(const char *c)`: Appends a null-terminated C string directly to the JSON buffer without escaping.
 - `append_raw(std::string_view input)`: Appends a string view directly to the JSON buffer without escaping.
 - `append_raw(const char *str, size_t len)`: Appends a specified number of characters from a C string directly to the JSON
-- `append_key_value(key,value)`: Appends a key and a value (`"json":somevalue`)
-- `append_key_value<"mykey">(value)`: Appends a key and a value (`"json":somevalue`), useful when the key is a compile-time constant (C++20).
 
-After writing the content, if you have reasons to believe that the content might violate UTF-8 conventions, you can check it as follows:
+After writting the content, if you have reasons to believe that the content might violate UTF-8 conventions, you can check it as follows:
 
 - `validate_unicode()`: Checks if the content in the JSON buffer is valid UTF-8. Returns: true if the content is valid UTF-8, false otherwise.
 
@@ -53,7 +52,7 @@ Once you are satisfied, you can recover the string as follows:
 
 - `operator std::string()`: Converts the JSON buffer to an std::string. (Might throw if an error occurred.)
 - `operator std::string_view()`: Converts the JSON buffer to an std::string_view.  (Might throw if an error occurred.)
-- `view()`: Returns a view of the written JSON buffer as a `simdjson_result<std::string_view>` (C++20).
+- `view()`: Returns a view of the written JSON buffer as a `simdjson_result<std::string_view>`.
 
 The later method (`view()`) is recommended.  For performance reasons, we expect you to explicitly call `validate_unicode()` as needed (e.g., prior to calling `view()`).
 
@@ -132,20 +131,20 @@ In all cases, the `std::string_view` instance depends the corresponding `string_
 
 
 
-If you have C++20, you can simplify the code, as the `std::vector<double>` is automatically supported. Further, we can pass the keys (which are compile-time
+If you have C++20, you can simplify the code, as the `std::vector<double>` is automatically
-constant) as template parameter (for improved performance).
+supported.
 
 ```cpp
     Car c = {"Toyota", "Corolla", 2017, {30.0,30.2,30.513,30.79}};
     simdjson::builder::string_builder sb;
     sb.start_object();
-    sb.append_key_value<"make">(c.make);
+    sb.append_key_value("make", c.make);
     sb.append_comma();
-    sb.append_key_value<"model">(c.model);
+    sb.append_key_value("model", c.model);
     sb.append_comma();
-    sb.append_key_value<"year">(c.year);
+    sb.append_key_value("year", c.year);
     sb.append_comma();
-    sb.append_key_value<"tire_pressure">(c.tire_pressure);
+    sb.append_key_value("tire_pressure", c.tire_pressure);
     sb.end_object();
     std::string_view p = sb.view();
 ```
@@ -176,52 +175,9 @@ std::vector<std::vector<double>> c = {{1.0, 2.0}, {3.0, 4.0}};
 std::string json = simdjson::to_json(c);
 ```
 
-We also have an overload for when you want to reuse the same `std::string` instance:
-
-
-```cpp
-std::vector<std::vector<double>> c = {{1.0, 2.0}, {3.0, 4.0}};
-std::string json;
-auto error = simdjson::to_json(c, json);
-if(error) { /* there was an error */ }
-```
-
-
 We do recommend that you create and reuse the `string_builder` instance for performance
 reasons.
 
-You can also add custom serialization functions using a `tag_invoke` function.
-For example, the following
-function will allow you to serialize instances of the type `Car`.
-
-```cpp
-#include <simdjson>
-
-struct Car {
-  std::string make;
-  std::string model;
-  int64_t year;
-  std::vector<float> tire_pressure;
-};
-
-namespace simdjson {
-
-template <typename builder_type>
-void tag_invoke(serialize_tag, builder_type &builder, const Car& car) {
-  builder.start_object();
-  builder.append_key_value("make", car.make);
-  builder.append_comma();
-  builder.append_key_value("model", car.model);
-  builder.append_comma();
-  builder.append_key_value("year", car.year);
-  builder.append_comma();
-  builder.append_key_value("tire_pressure", car.tire_pressure);
-  builder.end_object();
-}
-
-} // namespace simdjson
-```
-
 C++26 static reflection
 ------------------------
 
@@ -283,17 +239,7 @@ with the `simdjson::to_json` template function.
 If you know the output size, in bytes, of your JSON string, you may
 pass it as a second parameter (e.g., `simdjson::to_json(c, 31123)`).
 
-Sometimes you may want to reuse the same `std::string` instance. We
-have an overload for this purpose:
 
-```cpp
-Car c = {"Toyota", "Corolla", 2017, {30.0,30.2,30.513,30.79}};
-std::string s;
-auto error = simdjson::to_json(c, s);
-if(error) { /* there was an error */ }
-```
-
-You can then also add a third parameter for the expected output size in bytes.
 
 ### Without `string_buffer` instance but with explicit error handling
 
@@ -302,44 +248,9 @@ pattern:
 
 ```cpp
   std::string json;
-  if(simdjson::to_json(c).get(json)) {
+  if(simdjson::to(c).get(json)) {
     // there was an error
   } else {
     // json contain the serialized JSON
   }
 ```
-
-### Customization
-
-If you want to serialize a value in a custome way, you can do it with a
-`tag_invoke` specialization like the following example which will map
-the year attribute to a string.
-
-
-```cpp
-#include <simdjson>
-
-struct Car {
-  std::string make;
-  std::string model;
-  int64_t year;
-  std::vector<float> tire_pressure;
-};
-
-namespace simdjson {
-
-template <typename builder_type>
-void tag_invoke(serialize_tag, builder_type &builder, const Car& car) {
-  builder.start_object();
-  builder.append_key_value("make", car.make);
-  builder.append_comma();
-  builder.append_key_value("model", car.model);
-  builder.append_comma();
-  builder.append_key_value("year", std::to_string(car.year));
-  builder.append_comma();
-  builder.append_key_value("tire_pressure", car.tire_pressure);
-  builder.end_object();
-}
-
-} // namespace simdjson
-```

doc/dom.md

@@ -129,7 +129,7 @@ Once you have an element, you can navigate it with idiomatic C++ iterators, oper
   The strings contain unescaped valid UTF-8 strings: no unmatched surrogate is allowed.
   Internally, numbers are stored as either 64-bit integers or 64-bit floating-point numbers.
   Thus it is possible to get the full 64-bit integer range (either signed or  unsigned).
-  By default, the string `-0` is parsed as the integer 0 as in Python or C++. If you set the macro
+  By default, the string `-0` is parsed as the integer 0 as in Pytho or C++. If you set the macro
   `SIMDJSON_MINUS_ZERO_AS_FLOAT` to `1` when building simdjson, you can get that `-0` is mapped to `-0.0`
   as in JavaScript. You can get the desired effect by building simdjson with cmake setting the
   `SIMDJSON_MINUS_ZERO_AS_FLOAT` to on: `cmake -B build -D SIMDJSON_MINUS_ZERO_AS_FLOAT=ON`.

include/simdjson/builtin.h

@@ -24,6 +24,8 @@
 #include "simdjson/lsx.h"
 #elif SIMDJSON_BUILTIN_IMPLEMENTATION_IS(lasx)
 #include "simdjson/lasx.h"
+#elif SIMDJSON_BUILTIN_IMPLEMENTATION_IS(rvv)
+#include "simdjson/rvv.h"
 #else
 #error Unknown SIMDJSON_BUILTIN_IMPLEMENTATION
 #endif

include/simdjson/builtin/base.h

@@ -21,6 +21,8 @@ namespace simdjson {
   namespace lsx {}
 #elif SIMDJSON_BUILTIN_IMPLEMENTATION_IS(lasx)
   namespace lasx {}
+#elif SIMDJSON_BUILTIN_IMPLEMENTATION_IS(rvv)
+  namespace rvv {}
 #else
 #error Unknown SIMDJSON_BUILTIN_IMPLEMENTATION
 #endif

include/simdjson/builtin/implementation.h

@@ -23,6 +23,8 @@
 #include "simdjson/lsx/implementation.h"
 #elif SIMDJSON_BUILTIN_IMPLEMENTATION_IS(lasx)
 #include "simdjson/lasx/implementation.h"
+#elif SIMDJSON_BUILTIN_IMPLEMENTATION_IS(rvv)
+#include "simdjson/rvv/implementation.h"
 #else
 #error Unknown SIMDJSON_BUILTIN_IMPLEMENTATION
 #endif

include/simdjson/builtin/ondemand.h

@@ -24,6 +24,8 @@
 #include "simdjson/lsx/ondemand.h"
 #elif SIMDJSON_BUILTIN_IMPLEMENTATION_IS(lasx)
 #include "simdjson/lasx/ondemand.h"
+#elif SIMDJSON_BUILTIN_IMPLEMENTATION_IS(rvv)
+#include "simdjson/rvv/ondemand.h"
 #else
 #error Unknown SIMDJSON_BUILTIN_IMPLEMENTATION
 #endif

include/simdjson/concepts.h

@@ -122,32 +122,11 @@ concept optional_type = requires(std::remove_cvref_t<T> obj) {
     } -> std::convertible_to<typename std::remove_cvref_t<T>::value_type>;
   };
   { static_cast<bool>(obj) } -> std::same_as<bool>; // convertible to bool
-  { obj.reset() } noexcept -> std::same_as<void>;
 };
 
 
 
-
-
 } // namespace concepts
-
-
-/**
- * We use tag_invoke as our customization point mechanism.
- */
-template <typename Tag, typename... Args>
-concept tag_invocable = requires(Tag tag, Args... args) {
-  tag_invoke(std::forward<Tag>(tag), std::forward<Args>(args)...);
-};
-
-template <typename Tag, typename... Args>
-concept nothrow_tag_invocable =
-    tag_invocable<Tag, Args...> && requires(Tag tag, Args... args) {
-      {
-        tag_invoke(std::forward<Tag>(tag), std::forward<Args>(args)...)
-      } noexcept;
-    };
-
 } // namespace simdjson
 #endif // SIMDJSON_SUPPORTS_CONCEPTS
 #endif // SIMDJSON_CONCEPTS_H

include/simdjson/convert-inl.h

@@ -58,12 +58,6 @@ inline simdjson_result<T> auto_parser<parser_type>::result() noexcept(is_nothrow
   return m_doc.get<T>();
 }
 
-template <typename parser_type>
-template <typename T>
-simdjson_warn_unused simdjson_inline error_code auto_parser<parser_type>::get(T &value) && noexcept(is_nothrow_gettable<T>) {
-  return result<T>().get(value);
-}
-
 template <typename parser_type>
 inline simdjson_result<ondemand::array> auto_parser<parser_type>::array() noexcept {
   return result<ondemand::array>();
@@ -79,7 +73,12 @@ inline simdjson_result<ondemand::number> auto_parser<parser_type>::number() noex
   return result<ondemand::number>();
 }
 
-#if SIMDJSON_EXCEPTIONS
+template <typename parser_type>
+template <typename T>
+inline auto_parser<parser_type>::operator simdjson_result<T>() noexcept(is_nothrow_gettable<T>) {
+  return result<T>();
+}
+
 template <typename parser_type>
 template <typename T>
 inline auto_parser<parser_type>::operator T() noexcept(false) {
@@ -88,7 +87,6 @@ inline auto_parser<parser_type>::operator T() noexcept(false) {
   }
   return m_doc.get<T>();
 }
-#endif // SIMDJSON_EXCEPTIONS
 
 template <typename parser_type>
 template <typename T>
@@ -111,23 +109,13 @@ inline T to_adaptor<T>::operator()(simdjson_result<ondemand::value> &val) const
 
 template <typename T>
 inline auto to_adaptor<T>::operator()(padded_string_view const str) const noexcept {
-  return auto_parser<ondemand::parser *>{str};
+  return auto_parser{str};
 }
 
 template <typename T>
 inline auto to_adaptor<T>::operator()(ondemand::parser &parser, padded_string_view const str) const noexcept {
   return auto_parser<ondemand::parser *>{parser, str};
 }
-
-template <typename T>
-inline auto to_adaptor<T>::operator()(std::string str) const noexcept {
-  return auto_parser<ondemand::parser *>{pad_with_reserve(str)};
-}
-
-template <typename T>
-inline auto to_adaptor<T>::operator()(ondemand::parser &parser, std::string str) const noexcept {
-  return auto_parser<ondemand::parser *>{parser, pad_with_reserve(str)};
-}
 } // namespace internal
 } // namespace convert
 } // namespace simdjson

include/simdjson/convert.h

@@ -46,19 +46,16 @@ public:
 
 	template <typename T>
 	simdjson_warn_unused simdjson_inline simdjson_result<T> result() noexcept(is_nothrow_gettable<T>);
-	template <typename T>
-	simdjson_warn_unused simdjson_inline error_code get(T &value) && noexcept(is_nothrow_gettable<T>);
-
 
 	simdjson_warn_unused simdjson_inline simdjson_result<ondemand::array> array() noexcept;
 	simdjson_warn_unused simdjson_inline simdjson_result<ondemand::object> object() noexcept;
 	simdjson_warn_unused simdjson_inline simdjson_result<ondemand::number> number() noexcept;
 
+	template <typename T>
+	simdjson_warn_unused simdjson_inline explicit(false) operator simdjson_result<T>() noexcept(is_nothrow_gettable<T>);
 
-#if SIMDJSON_EXCEPTIONS
 	template <typename T>
 	simdjson_warn_unused simdjson_inline explicit(false) operator T() noexcept(false);
-#endif // SIMDJSON_EXCEPTIONS
 
 	template <typename T>
 	simdjson_warn_unused simdjson_inline std::optional<T> optional() noexcept(is_nothrow_gettable<T>);
@@ -75,14 +72,7 @@ struct to_adaptor {
 	T operator()(simdjson_result<ondemand::value> &val) const noexcept;
 	auto operator()(padded_string_view const str) const noexcept;
 	auto operator()(ondemand::parser &parser, padded_string_view const str) const noexcept;
-	// The std::string is padded with reserve to ensure there is enough space for padding.
-	// Some sanitizers may not like this, so you can use simdjson::pad instead.
-	// simdjson::from(simdjson::pad(str))
-	auto operator()(std::string str) const noexcept;
-	auto operator()(ondemand::parser &parser, std::string str) const noexcept;
 };
-// deduction guide
-auto_parser(padded_string_view const str) -> auto_parser<ondemand::parser*>;
 } // namespace internal
 } // namespace convert
 

include/simdjson/generic/ondemand/deserialize.h

@@ -7,8 +7,55 @@
 #include "simdjson/generic/ondemand/array.h"
 #endif // SIMDJSON_CONDITIONAL_INCLUDE
 
+#include <concepts>
 namespace simdjson {
 
+namespace tag_invoke_fn_ns {
+void tag_invoke();
+
+struct tag_invoke_fn {
+  template <typename Tag, typename... Args>
+    requires requires(Tag tag, Args &&...args) {
+      tag_invoke(std::forward<Tag>(tag), std::forward<Args>(args)...);
+    }
+  constexpr auto operator()(Tag tag, Args &&...args) const
+      noexcept(noexcept(tag_invoke(std::forward<Tag>(tag),
+                                   std::forward<Args>(args)...)))
+          -> decltype(tag_invoke(std::forward<Tag>(tag),
+                                 std::forward<Args>(args)...)) {
+    return tag_invoke(std::forward<Tag>(tag), std::forward<Args>(args)...);
+  }
+};
+} // namespace tag_invoke_fn_ns
+
+inline namespace tag_invoke_ns {
+inline constexpr tag_invoke_fn_ns::tag_invoke_fn tag_invoke = {};
+} // namespace tag_invoke_ns
+
+template <typename Tag, typename... Args>
+concept tag_invocable = requires(Tag tag, Args... args) {
+  tag_invoke(std::forward<Tag>(tag), std::forward<Args>(args)...);
+};
+
+template <typename Tag, typename... Args>
+concept nothrow_tag_invocable =
+    tag_invocable<Tag, Args...> && requires(Tag tag, Args... args) {
+      {
+        tag_invoke(std::forward<Tag>(tag), std::forward<Args>(args)...)
+      } noexcept;
+    };
+
+template <typename Tag, typename... Args>
+using tag_invoke_result =
+    std::invoke_result<decltype(tag_invoke), Tag, Args...>;
+
+template <typename Tag, typename... Args>
+using tag_invoke_result_t =
+    std::invoke_result_t<decltype(tag_invoke), Tag, Args...>;
+
+template <auto &Tag> using tag_t = std::decay_t<decltype(Tag)>;
+
+
 struct deserialize_tag;
 
 /// These types are deserializable in a built-in way

include/simdjson/generic/ondemand/json_builder.h

@@ -38,7 +38,7 @@ concept container_but_not_string =
     !std::is_same_v<T, std::string_view> && !std::is_same_v<T, const char *>;
 
 template <class T>
-  requires(container_but_not_string<T> && !require_custom_serialization<T>)
+  requires(container_but_not_string<T>)
 constexpr void atom(string_builder &b, const T &t) {
   if (t.size() == 0) {
     b.append_raw("[]");
@@ -63,7 +63,6 @@ constexpr void atom(string_builder &b, const T &t) {
 }
 
 template <concepts::string_view_keyed_map T>
-  requires(!require_custom_serialization<T>)
 constexpr void atom(string_builder &b, const T &m) {
   if (m.empty()) {
     b.append_raw("{}");
@@ -100,7 +99,7 @@ template <class T>
            !std::is_same_v<T, std::string> &&
            !std::is_same_v<T, std::string_view> &&
            !std::is_same_v<T, const char*> &&
-           !std::is_same_v<T, char> && !require_custom_serialization<T>)
+           !std::is_same_v<T, char>)
 constexpr void atom(string_builder &b, const T &t) {
   int i = 0;
   b.append('{');
@@ -118,7 +117,6 @@ constexpr void atom(string_builder &b, const T &t) {
 
 // Support for optional types (std::optional, etc.)
 template <concepts::optional_type T>
-  requires(!require_custom_serialization<T>)
 constexpr void atom(string_builder &b, const T &opt) {
   if (opt) {
     atom(b, opt.value());
@@ -129,7 +127,6 @@ constexpr void atom(string_builder &b, const T &opt) {
 
 // Support for smart pointers (std::unique_ptr, std::shared_ptr, etc.)
 template <concepts::smart_pointer T>
-  requires(!require_custom_serialization<T>)
 constexpr void atom(string_builder &b, const T &ptr) {
   if (ptr) {
     atom(b, *ptr);
@@ -140,7 +137,7 @@ constexpr void atom(string_builder &b, const T &ptr) {
 
 // Support for enums - serialize as string representation using expand approach from P2996R12
 template <typename T>
-  requires(std::is_enum_v<T> && !require_custom_serialization<T>)
+  requires(std::is_enum_v<T>)
 void atom(string_builder &b, const T &e) {
 #if SIMDJSON_STATIC_REFLECTION
   constexpr auto enumerators = std::define_static_array(std::meta::enumerators_of(^^T));
@@ -164,7 +161,7 @@ template <concepts::appendable_containers T>
   requires(!container_but_not_string<T> && !concepts::string_view_keyed_map<T> &&
            !concepts::optional_type<T> && !concepts::smart_pointer<T> &&
            !std::is_same_v<T, std::string> &&
-           !std::is_same_v<T, std::string_view> && !std::is_same_v<T, const char*> && !require_custom_serialization<T>)
+           !std::is_same_v<T, std::string_view> && !std::is_same_v<T, const char*>)
 constexpr void atom(string_builder &b, const T &container) {
   if (container.empty()) {
     b.append_raw("[]");
@@ -199,13 +196,11 @@ void append(string_builder &b, const T &t) {
 }
 
 template <concepts::optional_type T>
-  requires(!require_custom_serialization<T>)
 void append(string_builder &b, const T &t) {
   atom(b, t);
 }
 
 template <concepts::smart_pointer T>
-  requires(!require_custom_serialization<T>)
 void append(string_builder &b, const T &t) {
   atom(b, t);
 }
@@ -214,13 +209,12 @@ template <concepts::appendable_containers T>
   requires(!container_but_not_string<T> && !concepts::string_view_keyed_map<T> &&
            !concepts::optional_type<T> && !concepts::smart_pointer<T> &&
            !std::is_same_v<T, std::string> &&
-           !std::is_same_v<T, std::string_view> && !std::is_same_v<T, const char*> && !require_custom_serialization<T>)
+           !std::is_same_v<T, std::string_view> && !std::is_same_v<T, const char*>)
 void append(string_builder &b, const T &t) {
   atom(b, t);
 }
 
 template <concepts::string_view_keyed_map T>
-  requires(!require_custom_serialization<T>)
 void append(string_builder &b, const T &t) {
   atom(b, t);
 }
@@ -235,7 +229,7 @@ template <class Z>
            !std::is_same_v<Z, std::string> &&
            !std::is_same_v<Z, std::string_view> &&
            !std::is_same_v<Z, const char*> &&
-           !std::is_same_v<Z, char> && !require_custom_serialization<Z>)
+           !std::is_same_v<Z, char>)
 void append(string_builder &b, const Z &z) {
   int i = 0;
   b.append('{');
@@ -253,7 +247,7 @@ void append(string_builder &b, const Z &z) {
 
 // works for container
 template <class Z>
-  requires(container_but_not_string<Z> && !require_custom_serialization<Z>)
+  requires(container_but_not_string<Z>)
 void append(string_builder &b, const Z &z) {
   if (z.size() == 0) {
     b.append_raw("[]");
@@ -269,14 +263,7 @@ void append(string_builder &b, const Z &z) {
 }
 
 template <class Z>
-  requires (require_custom_serialization<Z>)
+simdjson_result<std::string> to_json_string(const Z &z, size_t initial_capacity = 1024) {
-void append(string_builder &b, const Z &z) {
-  b.append(z);
-}
-
-
-template <class Z>
-simdjson_warn_unused simdjson_result<std::string> to_json_string(const Z &z, size_t initial_capacity = string_builder::DEFAULT_INITIAL_CAPACITY) {
   string_builder b(initial_capacity);
   append(b, z);
   std::string_view s;
@@ -285,8 +272,8 @@ simdjson_warn_unused simdjson_result<std::string> to_json_string(const Z &z, siz
 }
 
 template <class Z>
-simdjson_warn_unused simdjson_error to_json(const Z &z, std::string &s, size_t initial_capacity = string_builder::DEFAULT_INITIAL_CAPACITY) {
+simdjson_error to_json(const Z &z, std::string &s) {
-  string_builder b(initial_capacity);
+  string_builder b;
   append(b, z);
   std::string_view view;
   if(auto e = b.view().get(view); e) { return e; }
@@ -303,13 +290,9 @@ string_builder& operator<<(string_builder& b, const Z& z) {
 } // namespace SIMDJSON_IMPLEMENTATION
 // Alias the function template to 'to' in the global namespace
 template <class Z>
-simdjson_warn_unused simdjson_result<std::string> to_json(const Z &z, size_t initial_capacity = SIMDJSON_IMPLEMENTATION::builder::string_builder::DEFAULT_INITIAL_CAPACITY) {
+simdjson_result<std::string> to_json(const Z &z, size_t initial_capacity = 1024) {
   return SIMDJSON_IMPLEMENTATION::builder::to_json_string(z, initial_capacity);
 }
-template <class Z>
-simdjson_warn_unused simdjson_error to_json(const Z &z, std::string &s, size_t initial_capacity = SIMDJSON_IMPLEMENTATION::builder::string_builder::DEFAULT_INITIAL_CAPACITY) {
-  return SIMDJSON_IMPLEMENTATION::builder::to_json(z, s, initial_capacity);
-}
 } // namespace simdjson
 
 #endif // SIMDJSON_STATIC_REFLECTION

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

@@ -284,12 +284,10 @@ simdjson_inline void string_builder::clear() noexcept {
 
 namespace internal {
 
+// We could specialize further for 32-bit integers.
+simdjson_really_inline int int_log2(uint32_t x) { return (63 - leading_zeroes(x | 1)); }
 
-template <typename number_type, typename = typename std::enable_if<
+simdjson_really_inline int fast_digit_count(uint32_t x) {
-                                    std::is_unsigned<number_type>::value>::type>
-simdjson_really_inline int int_log2(number_type x) { return 63 - leading_zeroes(uint64_t(x) | 1); }
-
-simdjson_really_inline int fast_digit_count_32(uint32_t x) {
   static uint64_t table[] = {
       4294967296,  8589934582,  8589934582,  8589934582,  12884901788,
       12884901788, 12884901788, 17179868184, 17179868184, 17179868184,
@@ -301,8 +299,9 @@ simdjson_really_inline int fast_digit_count_32(uint32_t x) {
   return uint32_t((x + table[int_log2(x)]) >> 32);
 }
 
+simdjson_really_inline int int_log2(uint64_t x) { return 63 - leading_zeroes(x | 1); }
 
-simdjson_really_inline int fast_digit_count_64(uint64_t x) {
+simdjson_really_inline int fast_digit_count(uint64_t x) {
   static uint64_t table[] = {9,
                              99,
                              999,
@@ -333,11 +332,7 @@ simdjson_really_inline size_t digit_count(number_type v) noexcept {
   static_assert(sizeof(number_type) == 8 || sizeof(number_type) == 4 ||
                     sizeof(number_type) == 2 || sizeof(number_type) == 1,
                 "We only support 8-bit, 16-bit, 32-bit and 64-bit numbers");
-  SIMDJSON_IF_CONSTEXPR(sizeof(number_type) <= 4) {
+  return fast_digit_count(v);
-    return fast_digit_count_32(static_cast<uint32_t>(v));
-  } else {
-    return fast_digit_count_64(static_cast<uint64_t>(v));
-  }
 }
 static const char decimal_table[200] = {
   0x30, 0x30, 0x30, 0x31, 0x30, 0x32, 0x30, 0x33, 0x30, 0x34, 0x30, 0x35,
@@ -360,7 +355,6 @@ static const char decimal_table[200] = {
 };
 } // namespace internal
 
-
 template <typename number_type, typename>
 simdjson_inline void string_builder::append(number_type v) noexcept {
   static_assert(std::is_same<number_type, bool>::value ||
@@ -476,12 +470,6 @@ simdjson_inline void string_builder::escape_and_append_with_quotes(const char* i
   std::string_view cinput(input);
   escape_and_append_with_quotes(cinput);
 }
-#if SIMDJSON_SUPPORTS_CONCEPTS
-template<internal::fixed_string key>
-simdjson_inline void string_builder::escape_and_append_with_quotes()  noexcept {
-  escape_and_append_with_quotes(internal::string_constant<key>::value);
-}
-#endif
 
 simdjson_inline void string_builder::append_raw(const char *c) noexcept {
   size_t len = std::strlen(c);
@@ -506,7 +494,6 @@ simdjson_inline void string_builder::append_raw(const char *str,
 #if SIMDJSON_SUPPORTS_CONCEPTS
 // Support for optional types (std::optional, etc.)
 template <concepts::optional_type T>
- requires(!require_custom_serialization<T>)
 simdjson_inline void string_builder::append(const T &opt) {
   if (opt) {
     append(*opt);
@@ -514,17 +501,9 @@ simdjson_inline void string_builder::append(const T &opt) {
     append_null();
   }
 }
-
-
-template <typename T>
-requires(require_custom_serialization<T>)
-simdjson_inline void string_builder::append(const T &val) {
-  serialize(*this, val);
-}
-
 template <typename T>
 requires(std::is_convertible<T, std::string_view>::value ||
-std::is_same<T, const char*>::value)
+std::is_same<T, const char*>::value )
 simdjson_inline void string_builder::append(const T &value) {
   escape_and_append_with_quotes(value);
 }
@@ -670,25 +649,6 @@ simdjson_inline void string_builder::append_key_value(key_type key, value_type v
   }
 }
 
-#if SIMDJSON_SUPPORTS_CONCEPTS
-template<internal::fixed_string key, typename value_type>
-simdjson_inline void string_builder::append_key_value(value_type value) noexcept {
-  escape_and_append_with_quotes<key>();
-  append_colon();
-  SIMDJSON_IF_CONSTEXPR(std::is_same<value_type, std::nullptr_t>::value) {
-    append_null();
-  } else SIMDJSON_IF_CONSTEXPR(std::is_same<value_type, char>::value) {
-    escape_and_append_with_quotes(value);
-  } else SIMDJSON_IF_CONSTEXPR(std::is_convertible<value_type, std::string_view>::value) {
-    escape_and_append_with_quotes(value);
-  } else SIMDJSON_IF_CONSTEXPR(std::is_same<value_type, const char*>::value) {
-    escape_and_append_with_quotes(value);
-  } else {
-    append(value);
-  }
-}
-#endif
-
 } // namespace builder
 } // namespace SIMDJSON_IMPLEMENTATION
 } // namespace simdjson

include/simdjson/generic/ondemand/json_string_builder.h

@@ -10,62 +10,9 @@
 #endif // SIMDJSON_CONDITIONAL_INCLUDE
 
 namespace simdjson {
-
-
-#if SIMDJSON_SUPPORTS_CONCEPTS
-
 namespace SIMDJSON_IMPLEMENTATION {
 namespace builder {
-  class string_builder;
-}}
 
-template <typename T, typename = void>
-struct has_custom_serialization : std::false_type {};
-
-inline constexpr struct serialize_tag {
-  template <typename T>
-    requires custom_deserializable<T>
-  constexpr void operator()(SIMDJSON_IMPLEMENTATION::builder::string_builder& b, T& obj) const{
-    return tag_invoke(*this, b, obj);
-  }
-
-
-} serialize{};
-template <typename T>
-struct has_custom_serialization<T, std::void_t<
-    decltype(tag_invoke(serialize, std::declval<SIMDJSON_IMPLEMENTATION::builder::string_builder&>(), std::declval<T&>()))
->> : std::true_type {};
-
-template <typename T>
-constexpr bool require_custom_serialization = has_custom_serialization<T>::value;
-#else
-struct has_custom_serialization : std::false_type {};
-#endif // SIMDJSON_SUPPORTS_CONCEPTS
-
-namespace SIMDJSON_IMPLEMENTATION {
-namespace builder {
-#if SIMDJSON_SUPPORTS_CONCEPTS
-// Helper to create string constants
-namespace internal {
-template <std::size_t N>
-struct fixed_string {
-    constexpr fixed_string(const char (&str)[N])  {
-        for (std::size_t i = 0; i < N; ++i) {
-            data[i] = str[i];
-        }
-    }
-    char data[N];
-    constexpr std::string_view view() const { return {data, N - 1}; }
-};
-template <std::size_t N>
-fixed_string(const char (&)[N]) -> fixed_string<N>;
-
-template <fixed_string str>
-struct string_constant {
-    static constexpr std::string_view value = str.view();
-};
-} // namespace internal
-#endif // SIMDJSON_SUPPORTS_CONCEPTS
 /**
  * A builder for JSON strings representing documents. This is a low-level
  * builder that is not meant to be used directly by end-users. Though it
@@ -77,9 +24,7 @@ struct string_constant {
  */
 class string_builder {
 public:
-  simdjson_inline string_builder(size_t initial_capacity = DEFAULT_INITIAL_CAPACITY);
+  simdjson_inline string_builder(size_t initial_capacity = 1024);
-
-  static constexpr size_t DEFAULT_INITIAL_CAPACITY = 1024;
 
   /**
    * Append number (includes Booleans). Booleans are mapped to the strings
@@ -117,10 +62,7 @@ public:
    * There is no UTF-8 validation.
    */
   simdjson_inline void escape_and_append_with_quotes(std::string_view input)  noexcept;
-#if SIMDJSON_SUPPORTS_CONCEPTS
+
-  template<internal::fixed_string key>
-  simdjson_inline void escape_and_append_with_quotes()  noexcept;
-#endif
   /**
    * Append the character surrounded by double quotes, after escaping it.
    * There is no UTF-8 validation.
@@ -177,18 +119,10 @@ public:
    template<typename key_type, typename value_type>
   simdjson_inline void append_key_value(key_type key, value_type value) noexcept;
 #if SIMDJSON_SUPPORTS_CONCEPTS
-  template<internal::fixed_string key, typename value_type>
-  simdjson_inline void append_key_value(value_type value) noexcept;
-
   // Support for optional types (std::optional, etc.)
   template <concepts::optional_type T>
-  requires(!require_custom_serialization<T>)
   simdjson_inline void append(const T &opt);
 
-  template <typename T>
-  requires(require_custom_serialization<T>)
-  simdjson_inline void append(const T &val);
-
   // Support for string-like types
   template <typename T>
   requires(std::is_convertible<T, std::string_view>::value ||
@@ -298,7 +232,7 @@ private:
 #if !SIMDJSON_STATIC_REFLECTION
 // fallback implementation until we have static reflection
 template <class Z>
-simdjson_warn_unused simdjson_result<std::string> to_json(const Z &z, size_t initial_capacity = simdjson::SIMDJSON_IMPLEMENTATION::builder::string_builder::DEFAULT_INITIAL_CAPACITY) {
+simdjson_result<std::string> to_json(const Z &z, size_t initial_capacity = 1024) {
   simdjson::SIMDJSON_IMPLEMENTATION::builder::string_builder b(initial_capacity);
   b.append(z);
   std::string_view s;
@@ -306,20 +240,8 @@ simdjson_warn_unused simdjson_result<std::string> to_json(const Z &z, size_t ini
   if(e) { return e; }
   return std::string(s);
 }
-template <class Z>
-simdjson_warn_unused simdjson_error to_json(const Z &z, std::string &s, size_t initial_capacity = simdjson::SIMDJSON_IMPLEMENTATION::builder::string_builder::DEFAULT_INITIAL_CAPACITY) {
-  simdjson::SIMDJSON_IMPLEMENTATION::builder::string_builder b(initial_capacity);
-  b.append(z);
-  std::string_view sv;
-  auto e = b.view().get(sv);
-  if(e) { return e; }
-  s.assign(sv.data(), sv.size());
-  return simdjson::SUCCESS;
-}
 #endif
 
-#if SIMDJSON_SUPPORTS_CONCEPTS
-#endif // SIMDJSON_SUPPORTS_CONCEPTS
 
 } // namespace simdjson
 

include/simdjson/generic/ondemand/std_deserialize.h

@@ -16,12 +16,15 @@
 #endif
 
 namespace simdjson {
+template <typename T>
+constexpr bool require_custom_serialization = false;
 
 //////////////////////////////
 // Number deserialization
 //////////////////////////////
 
 template <std::unsigned_integral T>
+  requires(!require_custom_serialization<T>)
 error_code tag_invoke(deserialize_tag, auto &val, T &out) noexcept {
   using limits = std::numeric_limits<T>;
 
@@ -35,6 +38,7 @@ error_code tag_invoke(deserialize_tag, auto &val, T &out) noexcept {
 }
 
 template <std::floating_point T>
+  requires(!require_custom_serialization<T>)
 error_code tag_invoke(deserialize_tag, auto &val, T &out) noexcept {
   double x;
   SIMDJSON_TRY(val.get_double().get(x));
@@ -43,6 +47,7 @@ error_code tag_invoke(deserialize_tag, auto &val, T &out) noexcept {
 }
 
 template <std::signed_integral T>
+  requires(!require_custom_serialization<T>)
 error_code tag_invoke(deserialize_tag, auto &val, T &out) noexcept {
   using limits = std::numeric_limits<T>;
 
@@ -72,6 +77,7 @@ error_code tag_invoke(deserialize_tag, auto &val, char &out) noexcept {
 
 // any string-like type (can be constructed from std::string_view)
 template <concepts::constructible_from_string_view T, typename ValT>
+  requires(!require_custom_serialization<T>)
 error_code tag_invoke(deserialize_tag, ValT &val, T &out) noexcept(std::is_nothrow_constructible_v<T, std::string_view>) {
   std::string_view str;
   SIMDJSON_TRY(val.get_string().get(str));
@@ -88,6 +94,7 @@ error_code tag_invoke(deserialize_tag, ValT &val, T &out) noexcept(std::is_nothr
  * doc.get<std::vector<int>>().
  */
 template <concepts::appendable_containers T, typename ValT>
+  requires(!require_custom_serialization<T>)
 error_code tag_invoke(deserialize_tag, ValT &val, T &out) noexcept(false) {
   using value_type = typename std::remove_cvref_t<T>::value_type;
   static_assert(
@@ -133,6 +140,7 @@ error_code tag_invoke(deserialize_tag, ValT &val, T &out) noexcept(false) {
  * string-keyed types.
  */
  template <concepts::string_view_keyed_map T, typename ValT>
+ requires(!require_custom_serialization<T>)
 error_code tag_invoke(deserialize_tag, ValT &val, T &out) noexcept(false) {
   using value_type = typename std::remove_cvref_t<T>::mapped_type;
   static_assert(
@@ -214,6 +222,7 @@ error_code tag_invoke(deserialize_tag, SIMDJSON_IMPLEMENTATION::ondemand::docume
  * @return status of the conversion
  */
 template <concepts::smart_pointer T, typename ValT>
+  requires(!require_custom_serialization<T>)
 error_code tag_invoke(deserialize_tag, ValT &val, T &out) noexcept(nothrow_deserializable<typename std::remove_cvref_t<T>::element_type, ValT>) {
   using element_type = typename std::remove_cvref_t<T>::element_type;
 
@@ -239,6 +248,7 @@ error_code tag_invoke(deserialize_tag, ValT &val, T &out) noexcept(nothrow_deser
  * This CPO (Customization Point Object) will help deserialize into optional types.
  */
 template <concepts::optional_type T>
+  requires(!require_custom_serialization<T>)
 error_code tag_invoke(deserialize_tag, auto &val, T &out) noexcept(nothrow_deserializable<typename std::remove_cvref_t<T>::value_type, decltype(val)>) {
   using value_type = typename std::remove_cvref_t<T>::value_type;
 
@@ -264,7 +274,7 @@ error_code tag_invoke(deserialize_tag, auto &val, T &out) noexcept(nothrow_deser
 template <typename T>
 constexpr bool user_defined_type = (std::is_class_v<T>
 && !std::is_same_v<T, std::string> && !std::is_same_v<T, std::string_view> && !concepts::optional_type<T> &&
-!concepts::appendable_containers<T>);
+!concepts::appendable_containers<T> && !require_custom_serialization<T>);
 
 
 template <typename T, typename ValT>
@@ -276,26 +286,18 @@ error_code tag_invoke(deserialize_tag, ValT &val, T &out) noexcept {
   } else {
     SIMDJSON_TRY(val.get_object().get(obj));
   }
+  error_code e = simdjson::SUCCESS;
   template for (constexpr auto mem : std::define_static_array(std::meta::nonstatic_data_members_of(^^T, std::meta::access_context::unchecked()))) {
         if constexpr (!std::meta::is_const(mem) && std::meta::is_public(mem)) {
       constexpr std::string_view key = std::define_static_string(std::meta::identifier_of(mem));
-      if constexpr (concepts::optional_type<decltype(out.[:mem:])>) {
+      // Note: removed static assert as optional types are now handled generically
-        // for optional members, it's ok if the key is missing
+      // as long we are succesful or the field is not found, we continue
-        auto error = obj[key].get(out.[:mem:]);
+      if(e == simdjson::SUCCESS || e == simdjson::NO_SUCH_FIELD) {
-        if (error && error != NO_SUCH_FIELD) {
+        e = obj[key].get(out.[:mem:]);
-          if(error == NO_SUCH_FIELD) {
-            out.[:mem:].reset();
-            continue;
-          }
-          return error;
-        }
-      } else {
-        // for non-optional members, the key must be present
-        SIMDJSON_TRY(obj[key].get(out.[:mem:]));
       }
     }
   };
-  return simdjson::SUCCESS;
+  return e;
 }
 
 // Support for enum deserialization - deserialize from string representation using expand approach from P2996R12

include/simdjson/implementation_detection.h

@@ -12,6 +12,7 @@
 #define SIMDJSON_IMPLEMENTATION_ID_westmere 6
 #define SIMDJSON_IMPLEMENTATION_ID_lsx 7
 #define SIMDJSON_IMPLEMENTATION_ID_lasx 8
+#define SIMDJSON_IMPLEMENTATION_ID_rvv 9
 
 #define SIMDJSON_IMPLEMENTATION_ID_FOR(IMPL) SIMDJSON_CAT(SIMDJSON_IMPLEMENTATION_ID_, IMPL)
 #define SIMDJSON_IMPLEMENTATION_ID SIMDJSON_IMPLEMENTATION_ID_FOR(SIMDJSON_IMPLEMENTATION)
@@ -23,6 +24,15 @@
 // in which we include them.
 //
 
+#ifndef SIMDJSON_IMPLEMENTATION_RVV
+#define SIMDJSON_IMPLEMENTATION_RVV (SIMDJSON_IS_RISCV64 && SIMDJSON_IS_RVV)
+#endif
+#if SIMDJSON_IMPLEMENTATION_RVV && SIMDJSON_IS_RISCV64 && SIMDJSON_IS_RVV
+#define SIMDJSON_CAN_ALWAYS_RUN_RVV 1
+#else
+#define SIMDJSON_CAN_ALWAYS_RUN_RVV 0
+#endif
+
 #ifndef SIMDJSON_IMPLEMENTATION_ARM64
 #define SIMDJSON_IMPLEMENTATION_ARM64 (SIMDJSON_IS_ARM64)
 #endif
@@ -128,7 +138,7 @@
 
 // Default Fallback to on unless a builtin implementation has already been selected.
 #ifndef SIMDJSON_IMPLEMENTATION_FALLBACK
-#if SIMDJSON_CAN_ALWAYS_RUN_ARM64 || SIMDJSON_CAN_ALWAYS_RUN_ICELAKE || SIMDJSON_CAN_ALWAYS_RUN_HASWELL || SIMDJSON_CAN_ALWAYS_RUN_WESTMERE || SIMDJSON_CAN_ALWAYS_RUN_PPC64 || SIMDJSON_CAN_ALWAYS_RUN_LSX || SIMDJSON_CAN_ALWAYS_RUN_LASX
+#if SIMDJSON_CAN_ALWAYS_RUN_ARM64 || SIMDJSON_CAN_ALWAYS_RUN_ICELAKE || SIMDJSON_CAN_ALWAYS_RUN_HASWELL || SIMDJSON_CAN_ALWAYS_RUN_WESTMERE || SIMDJSON_CAN_ALWAYS_RUN_PPC64 || SIMDJSON_CAN_ALWAYS_RUN_LSX || SIMDJSON_CAN_ALWAYS_RUN_LASX || SIMDJSON_CAN_ALWAYS_RUN_RVV
 // if anything at all except fallback can always run, then disable fallback.
 #define SIMDJSON_IMPLEMENTATION_FALLBACK 0
 #else
@@ -154,6 +164,8 @@
 #define SIMDJSON_BUILTIN_IMPLEMENTATION lsx
 #elif SIMDJSON_CAN_ALWAYS_RUN_LASX
 #define SIMDJSON_BUILTIN_IMPLEMENTATION lasx
+#elif SIMDJSON_CAN_ALWAYS_RUN_RVV
+#define SIMDJSON_BUILTIN_IMPLEMENTATION rvv
 #elif SIMDJSON_CAN_ALWAYS_RUN_FALLBACK
 #define SIMDJSON_BUILTIN_IMPLEMENTATION fallback
 #else

include/simdjson/rvv.h

@@ -0,0 +1,8 @@
+#ifndef SIMDJSON_RVV_H
+#define SIMDJSON_RVV_H
+
+#include "simdjson/rvv/begin.h"
+#include "simdjson/generic/amalgamated.h"
+#include "simdjson/rvv/end.h"
+
+#endif // SIMDJSON_RVV_H

include/simdjson/rvv/base.h

@@ -0,0 +1,20 @@
+#ifndef SIMDJSON_RVV_BASE_H
+#define SIMDJSON_RVV_BASE_H
+
+#ifndef SIMDJSON_CONDITIONAL_INCLUDE
+#include "simdjson/base.h"
+#endif // SIMDJSON_CONDITIONAL_INCLUDE
+namespace simdjson {
+namespace rvv {
+
+class implementation;
+
+namespace {
+namespace simd {
+template <typename T> struct simd8;
+template <typename T> struct simd8x64;
+} // namespace simd
+} // unnamed namespace
+} // namespace rvv
+} // namespace simdjson
+#endif // SIMDJSON_RVV_BASE_H

include/simdjson/rvv/begin.h

@@ -0,0 +1,13 @@
+#define SIMDJSON_IMPLEMENTATION rvv
+
+// include RVV intrinsics and definitions
+#include <riscv_vector.h>
+#include "simdjson/rvv/base.h"
+#include "simdjson/rvv/intrinsics.h"
+#include "simdjson/rvv/bitmanipulation.h"
+#include "simdjson/rvv/bitmask.h"
+#include "simdjson/rvv/numberparsing_defs.h"
+#include "simdjson/rvv/simd.h"
+#include "simdjson/rvv/stringparsing_defs.h"
+
+#define SIMDJSON_SKIP_BACKSLASH_SHORT_CIRCUIT 1

include/simdjson/rvv/bitmanipulation.h

@@ -0,0 +1,54 @@
+#ifndef SIMDJSON_RVV_BITMANIPULATION_H
+#define SIMDJSON_RVV_BITMANIPULATION_H
+
+#ifndef SIMDJSON_CONDITIONAL_INCLUDE
+#include "simdjson/rvv/base.h"
+#endif // SIMDJSON_CONDITIONAL_INCLUDE
+
+namespace simdjson {
+namespace rvv {
+namespace {
+
+/* result might be undefined when input_num is zero */
+simdjson_inline int leading_zeroes(uint64_t input_num) {
+#if defined(_MSC_VER) && !defined(__clang__)
+    unsigned long leading_zero = 0;
+    if (_BitScanReverse64(&leading_zero, input_num))
+        return (int)(63 - leading_zero);
+    else
+        return 64;
+#else
+    return __builtin_clzll(input_num);
+#endif
+}
+
+simdjson_inline uint64_t clear_lowest_bit(uint64_t input_num) {
+    return input_num & (input_num - 1);
+}
+
+simdjson_inline int count_ones(uint64_t input_num) {
+    return __builtin_popcountll(input_num);
+}
+
+
+inline simdjson::internal::value128 full_multiplication(uint64_t a, uint64_t b) {
+#if __SIZEOF_INT128__
+    unsigned __int128 p = (unsigned __int128)a * b;
+    return { (uint64_t)p, (uint64_t)(p >> 64) };
+#else
+    uint64_t lo = a * b;
+    uint64_t a0 = (uint32_t)a, a1 = a >> 32;
+    uint64_t b0 = (uint32_t)b, b1 = b >> 32;
+    uint64_t mid1 = a0 * b1;
+    uint64_t mid2 = a1 * b0;
+    uint64_t carry = ((mid1 & 0xFFFFFFFF) + (mid2 & 0xFFFFFFFF) + (lo >> 32)) >> 32;
+    uint64_t hi = a1 * b1 + (mid1 >> 32) + (mid2 >> 32) + carry;
+    return { lo, hi };
+#endif
+}
+
+} // unnamed namespace
+} // namespace rvv
+} // namespace simdjson
+
+#endif // SIMDJSON_RVV_BITMANIPULATION_H

include/simdjson/rvv/end.h

@@ -0,0 +1,6 @@
+#ifndef SIMDJSON_CONDITIONAL_INCLUDE
+#include "simdjson/rvv/base.h"
+#endif // SIMDJSON_CONDITIONAL_INCLUDE
+
+#undef SIMDJSON_SKIP_BACKSLASH_SHORT_CIRCUIT
+#undef SIMDJSON_IMPLEMENTATION

include/simdjson/rvv/implementation.h

@@ -0,0 +1,29 @@
+#ifndef SIMDJSON_RVV_IMPLEMENTATION_H
+#define SIMDJSON_RVV_IMPLEMENTATION_H
+
+#ifndef SIMDJSON_CONDITIONAL_INCLUDE
+#define SIMDJSON_CONDITIONAL_INCLUDE
+#include "simdjson/base.h"
+#include "simdjson/implementation.h"
+#include "simdjson/internal/instruction_set.h"
+#endif // SIMDJSON_CONDITIONAL_INCLUDE
+
+namespace simdjson {
+namespace rvv {
+
+class implementation final: public simdjson::implementation {
+public:
+  simdjson_inline implementation() : simdjson::implementation("rvv", "RISC-V Vector Extension", 0) {}
+  simdjson_warn_unused error_code create_dom_parser_implementation(
+    size_t capacity,
+    size_t max_depth,
+    std::unique_ptr<internal::dom_parser_implementation>& dst
+  ) const noexcept final;
+  simdjson_warn_unused error_code minify(const uint8_t *buf, size_t len, uint8_t *dst, size_t &dst_len) const noexcept final;
+  simdjson_warn_unused bool validate_utf8(const char *buf, size_t len) const noexcept final;
+};
+
+} // namespace rvv
+} // namespace simdjson
+
+#endif // SIMDJSON_RVV_IMPLEMENTATION_H

include/simdjson/rvv/intrinsics.h

@@ -0,0 +1,8 @@
+#ifndef SIMDJSON_RVV_INTRINSICS_H
+#define SIMDJSON_RVV_INTRINSICS_H
+
+
+#ifndef SIMDJSON_CONDITIONAL_INCLUDE
+#include "simdjson/rvv/base.h"
+#endif // SIMDJSON_CONDITIONAL_INCLUDE
+#endif // SIMDJSON_RVV_INTRINSICS_H

include/simdjson/rvv/ondemand.h

@@ -0,0 +1,9 @@
+#ifndef SIMDJSON_RVV_ONDEMAND_H
+#define SIMDJSON_RVV_ONDEMAND_H
+
+#include "simdjson/rvv/begin.h"
+#include "simdjson/generic/ondemand/amalgamated.h"
+#include "simdjson/rvv/end.h"
+
+#endif // SIMDJSON_RVV_ONDEMAND_H
+

include/simdjson/rvv/simd.h

@@ -0,0 +1,298 @@
+#ifndef SIMDJSON_RVV_SIMD_H
+#define SIMDJSON_RVV_SIMD_H
+
+#ifndef SIMDJSON_CONDITIONAL_INCLUDE
+#include "simdjson/rvv/base.h"
+#include "simdjson/rvv/intrinsics.h"
+#include "simdjson/internal/simdprune_tables.h"
+#endif // SIMDJSON_CONDITIONAL_INCLUDE
+
+namespace simdjson {
+namespace rvv {
+namespace {
+namespace simd {
+
+// ---------- 128-bit fixed vectors ----------
+using vuint8x16 = vuint8m1_t __attribute__((riscv_rvv_vector_bits(128)));
+using vint8x16  = vint8m1_t  __attribute__((riscv_rvv_vector_bits(128)));
+using vbool8x16 = vbool8_t;
+static constexpr size_t fixed_vl = 16;
+
+// ---------- forward ----------
+template<typename T> struct simd8;
+template<typename T> struct simd8x64;
+
+// ---------- base<Child> ----------
+template<typename Child>
+struct base {
+    vuint8x16 value{};
+    base() = default;
+    base(vuint8x16 v) : value(v) {}
+    operator vuint8x16() const { return value; }
+    operator vuint8x16&()      { return value; }
+
+    simdjson_inline Child operator|(const Child o) const { return __riscv_vor_vv_u8m1(value, o, fixed_vl); }
+    simdjson_inline Child operator&(const Child o) const { return __riscv_vand_vv_u8m1(value, o, fixed_vl); }
+    simdjson_inline Child operator^(const Child o) const { return __riscv_vxor_vv_u8m1(value, o, fixed_vl); }
+    simdjson_inline Child bit_andnot(const Child o) const { return __riscv_vandn_vv_u8m1(value, o, fixed_vl); }
+
+    simdjson_inline Child& operator|=(const Child o) { auto* c = static_cast<Child*>(this); *c = *c | o; return *c; }
+    simdjson_inline Child& operator&=(const Child o) { auto* c = static_cast<Child*>(this); *c = *c & o; return *c; }
+    simdjson_inline Child& operator^=(const Child o) { auto* c = static_cast<Child*>(this); *c = *c ^ o; return *c; }
+};
+
+// ---------- base8<T,Mask> ----------
+template<typename T, typename Mask = simd8<bool>>
+struct base8 : base<simd8<T>> {
+    using base<simd8<T>>::value;
+    using bitmask_t = uint32_t;
+    base8() = default;
+    base8(vuint8x16 v) : base<simd8<T>>(v) {}
+
+    friend simdjson_inline Mask operator==(const simd8<T> a, const simd8<T> b) {
+        return simd8<bool>(__riscv_vmseq_vv_u8m1_b8(a, b, fixed_vl));
+    }
+    template<int N=1>
+    simdjson_inline simd8<T> prev(const simd8<T> prev_chunk) const {
+        return __riscv_vslideup_vx_u8m1(prev_chunk, value, fixed_vl - N, 2 * fixed_vl);
+    }
+};
+
+// ---------- simd8<bool> ----------
+template<>
+struct simd8<bool> : base8<bool> {
+    simd8() = default;
+    simd8(vuint8x16 v) : base8(v) {}
+    simd8(vbool8_t m) : base8(__riscv_vmerge_vvm_u8m1(
+                                    __riscv_vmv_v_x_u8m1(0, fixed_vl),
+                                    __riscv_vmv_v_x_u8m1(0xFFu, fixed_vl),
+                                    m, fixed_vl)) {}
+
+    static simdjson_inline simd8<bool> splat(bool b) {
+        return __riscv_vmv_v_x_u8m1(uint8_t(-b), fixed_vl);
+    }
+    simdjson_inline simd8(bool b) : simd8(splat(b)) {}
+
+    simdjson_inline int to_bitmask() const {
+        vuint8x16 bits = __riscv_vand_vx_u8m1(value, 0xFFu, fixed_vl);
+        vbool8x16 mask = __riscv_vmseq_vx_u8m1_b8(bits, 0xFFu, fixed_vl);
+        return __riscv_vcpop_m_b8(mask, fixed_vl);
+    }
+    simdjson_inline bool any_bits_set_anywhere() const {
+        return to_bitmask() != 0;
+    }
+    simdjson_inline simd8<bool> operator~() const { return *this ^ splat(true); }
+};
+
+// ---------- simd8<uint8_t> ----------
+template<>
+struct simd8<uint8_t> : base8<uint8_t> {
+    simd8() = default;
+    simd8(vuint8x16 v) : base8(v) {}
+    static simdjson_inline simd8<uint8_t> splat(uint8_t v) {
+        return __riscv_vmv_v_x_u8m1(v, fixed_vl);
+    }
+    static simdjson_inline simd8<uint8_t> zero() { return splat(0); }
+    static simdjson_inline simd8<uint8_t> load(const uint8_t* p) {
+        return __riscv_vle8_v_u8m1(p, fixed_vl);
+    }
+    simdjson_inline simd8(uint8_t v) : simd8(splat(v)) {}
+    simdjson_inline simd8(const uint8_t* p) : simd8(load(p)) {}
+
+    simdjson_inline void store(uint8_t* p) const {
+        __riscv_vse8_v_u8m1(p, value, fixed_vl);
+    }
+
+    simdjson_inline simd8<uint8_t> operator+(const simd8<uint8_t> o) const {
+        return __riscv_vadd_vv_u8m1(value, o, fixed_vl);
+    }
+    simdjson_inline simd8<uint8_t> operator-(const simd8<uint8_t> o) const {
+        return __riscv_vsub_vv_u8m1(value, o, fixed_vl);
+    }
+    simdjson_inline simd8<uint8_t>& operator+=(const simd8<uint8_t> o) {
+        *this = *this + o; return *this;
+    }
+    simdjson_inline simd8<uint8_t>& operator-=(const simd8<uint8_t> o) {
+        *this = *this - o; return *this;
+    }
+
+    simdjson_inline simd8<uint8_t> saturating_add(const simd8<uint8_t> o) const {
+        return __riscv_vsaddu_vv_u8m1(value, o, fixed_vl);
+    }
+    simdjson_inline simd8<uint8_t> saturating_sub(const simd8<uint8_t> o) const {
+        return __riscv_vssubu_vv_u8m1(value, o, fixed_vl);
+    }
+    simdjson_inline simd8<uint8_t> max_val(const simd8<uint8_t> o) const {
+        return __riscv_vmaxu_vv_u8m1(value, o, fixed_vl);
+    }
+    simdjson_inline simd8<uint8_t> min_val(const simd8<uint8_t> o) const {
+        return __riscv_vminu_vv_u8m1(value, o, fixed_vl);
+    }
+    simdjson_inline simd8<bool> operator>(const simd8<uint8_t> o) const {
+        return simd8<bool>(__riscv_vmsgtu_vv_u8m1_b8(value, o, fixed_vl));
+    }
+    simdjson_inline simd8<bool> operator<(const simd8<uint8_t> o) const {
+        return simd8<bool>(__riscv_vmsgtu_vv_u8m1_b8(o, value, fixed_vl));
+    }
+    simdjson_inline simd8<bool> operator<=(const simd8<uint8_t> o) const {
+        return simd8<bool>(__riscv_vmsleu_vv_u8m1_b8(value, o, fixed_vl));
+    }
+    simdjson_inline simd8<bool> operator>=(const simd8<uint8_t> o) const {
+        return simd8<bool>(__riscv_vmsleu_vv_u8m1_b8(o, value, fixed_vl));
+    }
+    template<int NS>
+    simdjson_inline simd8<uint8_t> shr() const {
+        return __riscv_vsrl_vx_u8m1(value, NS, fixed_vl);
+    }
+    template<int NS>
+    simdjson_inline simd8<uint8_t> shl() const {
+        return __riscv_vsll_vx_u8m1(value, NS, fixed_vl);
+    }
+    template <typename Ret>
+    simdjson_inline simd8<Ret> lookup_16(const Ret* table) const {
+        alignas(16) uint8_t idx[16];
+        store(idx);
+        alignas(16) Ret res[16];
+        for (int i = 0; i < 16; ++i) res[i] = table[idx[i]];
+        return simd8<Ret>::load(reinterpret_cast<const Ret*>(res));
+    }
+    simdjson_inline void compress(uint16_t mask, uint8_t* out) const {
+        alignas(16) uint8_t tmp[16];
+        store(tmp);
+        for (int i = 0, j = 0; i < 16; ++i)
+            if (mask & (1u << i)) out[j++] = tmp[i];
+    }
+    simdjson_inline uint64_t gt_bits(uint8_t max_value) const {
+        return (*this > splat(max_value)).to_bitmask();
+    }
+    simdjson_inline uint64_t gt_bits(const simd8<uint8_t>& max_vec) const {
+        return (*this > max_vec).to_bitmask();
+    }
+    simdjson_inline bool any_bits_set_anywhere() const {
+        return (*this > zero()).any_bits_set_anywhere();
+    }
+};
+
+// ---------- simd8<int8_t> ----------
+template<>
+struct simd8<int8_t> {
+    vint8x16 value{};
+    simd8() = default;
+    simd8(vint8x16 v) : value(v) {}
+    static simdjson_inline simd8<int8_t> splat(int8_t v) {
+        return __riscv_vmv_v_x_i8m1(v, fixed_vl);
+    }
+    static simdjson_inline simd8<int8_t> zero() { return splat(0); }
+        static simdjson_inline simd8<int8_t> load(const int8_t* p) {
+        return __riscv_vle8_v_i8m1(p, fixed_vl);
+    }
+    simdjson_inline simd8(int8_t v) : simd8(splat(v)) {}
+    simdjson_inline simd8(const int8_t* p) : simd8(load(p)) {}
+
+    simdjson_inline void store(int8_t* p) const {
+        __riscv_vse8_v_i8m1(p, value, fixed_vl);
+    }
+    simdjson_inline simd8<int8_t> operator+(const simd8<int8_t> o) const {
+        return __riscv_vadd_vv_i8m1(value, o.value, fixed_vl);
+    }
+    simdjson_inline simd8<int8_t> operator-(const simd8<int8_t> o) const {
+        return __riscv_vsub_vv_i8m1(value, o.value, fixed_vl);
+    }
+    simdjson_inline simd8<int8_t> max_val(const simd8<int8_t> o) const {
+        return __riscv_vmax_vv_i8m1(value, o.value, fixed_vl);
+    }
+    simdjson_inline simd8<int8_t> min_val(const simd8<int8_t> o) const {
+        return __riscv_vmin_vv_i8m1(value, o.value, fixed_vl);
+    }
+    simdjson_inline simd8<bool> operator>(const simd8<int8_t> o) const {
+        return simd8<bool>(__riscv_vmsgt_vv_i8m1_b8(value, o.value, fixed_vl));
+    }
+    simdjson_inline simd8<bool> operator<(const simd8<int8_t> o) const {
+        return simd8<bool>(__riscv_vmsgt_vv_i8m1_b8(o.value, value, fixed_vl));
+    }
+    simdjson_inline simd8<bool> operator==(const simd8<int8_t> o) const {
+        return simd8<bool>(__riscv_vmseq_vv_i8m1_b8(value, o.value, fixed_vl));
+    }
+    template<int N=1>
+    simdjson_inline simd8<int8_t> prev(const simd8<int8_t> prev_chunk) const {
+        return __riscv_vslideup_vx_i8m1(prev_chunk.value, value, fixed_vl - N, 2 * fixed_vl);
+    }
+};
+
+// ---------- simd8x64<T> ----------
+template<typename T>
+struct simd8x64 {
+    static constexpr int NUM_CHUNKS = 64 / sizeof(simd8<T>);
+    static_assert(NUM_CHUNKS == 4, "RVV kernel uses 4×128-bit chunks per 64-byte block.");
+    const simd8<T> chunks[4];
+
+    simd8x64(const simd8x64&) = delete;
+    simd8x64& operator=(const simd8x64&) = delete;
+    simd8x64() = delete;
+
+    simdjson_inline simd8x64(const simd8<T> c0, const simd8<T> c1,
+                             const simd8<T> c2, const simd8<T> c3)
+        : chunks{c0, c1, c2, c3} {}
+    simdjson_inline simd8x64(const T* ptr)
+        : chunks{simd8<T>::load(ptr),
+                 simd8<T>::load(ptr + 16),
+                 simd8<T>::load(ptr + 32),
+                 simd8<T>::load(ptr + 48)} {}
+
+    simdjson_inline void store(T* ptr) const {
+        chunks[0].store(ptr);
+        chunks[1].store(ptr + 16);
+        chunks[2].store(ptr + 32);
+        chunks[3].store(ptr + 48);
+    }
+    simdjson_inline simd8<T> reduce_or() const {
+        return (chunks[0] | chunks[1]) | (chunks[2] | chunks[3]);
+    }
+    simdjson_inline uint64_t to_bitmask() const {
+        uint16_t m0 = uint16_t(chunks[0].to_bitmask());
+        uint16_t m1 = uint16_t(chunks[1].to_bitmask());
+        uint16_t m2 = uint16_t(chunks[2].to_bitmask());
+        uint16_t m3 = uint16_t(chunks[3].to_bitmask());
+        return m0 | (uint64_t(m1) << 16) | (uint64_t(m2) << 32) | (uint64_t(m3) << 48);
+    }
+    simdjson_inline uint64_t eq(const T m) const {
+        simd8<T> spl = simd8<T>::splat(m);
+        return simd8x64<bool>(chunks[0] == spl,
+                              chunks[1] == spl,
+                              chunks[2] == spl,
+                              chunks[3] == spl).to_bitmask();
+    }
+    simdjson_inline uint64_t lteq(const T m) const {
+        simd8<T> spl = simd8<T>::splat(m);
+        return simd8x64<bool>(chunks[0] <= spl,
+                              chunks[1] <= spl,
+                              chunks[2] <= spl,
+                              chunks[3] <= spl).to_bitmask();
+    }
+    simdjson_inline uint64_t compress(uint64_t mask, T* out) const {
+        using internal::BitsSetTable256mul2;
+        uint32_t m0 = uint32_t(mask);
+        uint32_t m1 = uint32_t(mask >> 16);
+        uint32_t m2 = uint32_t(mask >> 32);
+        uint32_t m3 = uint32_t(mask >> 48);
+
+        int pop0 = BitsSetTable256mul2[uint8_t(m0)];
+        int pop1 = BitsSetTable256mul2[uint8_t(m1)];
+        int pop2 = BitsSetTable256mul2[uint8_t(m2)];
+
+        chunks[0].compress(uint16_t(m0), out);
+        chunks[1].compress(uint16_t(m1), out + 16 - pop0);
+        chunks[2].compress(uint16_t(m2), out + 32 - pop0 - pop1);
+        chunks[3].compress(uint16_t(m3), out + 48 - pop0 - pop1 - pop2);
+        return 64 - __builtin_popcountll(mask);
+    }
+};
+
+
+} // namespace simd
+} // unnamed namespace
+} // namespace rvv
+} // namespace simdjson
+
+
+#endif // SIMDJSON_RVV_SIMD_H

include/simdjson/simdjson_version.h

@@ -4,7 +4,7 @@
 #define SIMDJSON_SIMDJSON_VERSION_H
 
 /** The version of simdjson being used (major.minor.revision) */
-#define SIMDJSON_VERSION "4.0.6"
+#define SIMDJSON_VERSION "4.0.2"
 
 namespace simdjson {
 enum {
@@ -19,7 +19,7 @@ enum {
   /**
    * The revision (major.minor.REVISION) of simdjson being used.
    */
-  SIMDJSON_VERSION_REVISION = 6
+  SIMDJSON_VERSION_REVISION = 2
 };
 } // namespace simdjson
 

singleheader/amalgamate.py

@@ -71,7 +71,7 @@ else:
 RelativeRoot = str # Literal['src','include'] # Literal not supported in Python 3.7 (CI)
 RELATIVE_ROOTS: List[RelativeRoot] = ['src', 'include' ]
 Implementation = str # Literal['arm64', 'fallback', 'haswell', 'icelake', 'ppc64', 'westmere', 'lsx', 'lasx'] # Literal not supported in Python 3.7 (CI)
-IMPLEMENTATIONS: List[Implementation] = [ 'arm64', 'haswell', 'icelake', 'lasx', 'lsx', 'ppc64', 'westmere', 'fallback' ]
+IMPLEMENTATIONS: List[Implementation] = [ 'arm64', 'haswell', 'icelake', 'lasx', 'lsx', 'ppc64', 'westmere', 'fallback', 'rvv' ]
 GENERIC_INCLUDE = "simdjson/generic"
 GENERIC_SRC = "generic"
 BUILTIN = "simdjson/builtin"
@@ -358,7 +358,6 @@ class Amalgamator:
         self.include_stack.append(file)
 
         file.processed = False
-
         self.write(f"/* begin file {self.file_to_str(file)} */")
 
         if file == BUILTIN_BEGIN_H:

singleheader/simdjson.cpp

@@ -1,4 +1,4 @@
-/* auto-generated on 2025-09-20 22:23:09 -0600. version 4.0.6 Do not edit! */
+/* auto-generated on 2025-09-14 09:01:41 -0600. version 4.0.2 Do not edit! */
 /* including simdjson.cpp:  */
 /* begin file simdjson.cpp */
 #define SIMDJSON_SRC_SIMDJSON_CPP
@@ -3009,32 +3009,11 @@ concept optional_type = requires(std::remove_cvref_t<T> obj) {
     } -> std::convertible_to<typename std::remove_cvref_t<T>::value_type>;
   };
   { static_cast<bool>(obj) } -> std::same_as<bool>; // convertible to bool
-  { obj.reset() } noexcept -> std::same_as<void>;
 };
 
 
 
-
-
 } // namespace concepts
-
-
-/**
- * We use tag_invoke as our customization point mechanism.
- */
-template <typename Tag, typename... Args>
-concept tag_invocable = requires(Tag tag, Args... args) {
-  tag_invoke(std::forward<Tag>(tag), std::forward<Args>(args)...);
-};
-
-template <typename Tag, typename... Args>
-concept nothrow_tag_invocable =
-    tag_invocable<Tag, Args...> && requires(Tag tag, Args... args) {
-      {
-        tag_invoke(std::forward<Tag>(tag), std::forward<Args>(args)...)
-      } noexcept;
-    };
-
 } // namespace simdjson
 #endif // SIMDJSON_SUPPORTS_CONCEPTS
 #endif // SIMDJSON_CONCEPTS_H

src/implementation.cpp

@@ -21,6 +21,19 @@ bool implementation::supported_by_runtime_system() const {
 
 #define SIMDJSON_CONDITIONAL_INCLUDE
 
+#if SIMDJSON_IMPLEMENTATION_RVV
+#include <simdjson/rvv/implementation.h>
+namespace simdjson {
+namespace internal {
+static const rvv::implementation* get_rvv_singleton() {
+  static const rvv::implementation rvv_singleton{};
+  return &rvv_singleton;
+}
+} // namespace internal
+} // namespace simdjson
+#endif // SIMDJSON_IMPLEMENTATION_RVV
+
+
 #if SIMDJSON_IMPLEMENTATION_ARM64
 #include <simdjson/arm64/implementation.h>
 namespace simdjson {
@@ -130,6 +143,7 @@ namespace internal {
              + SIMDJSON_IMPLEMENTATION_HASWELL + SIMDJSON_IMPLEMENTATION_WESTMERE \
              + SIMDJSON_IMPLEMENTATION_ARM64 + SIMDJSON_IMPLEMENTATION_PPC64 \
              + SIMDJSON_IMPLEMENTATION_LSX + SIMDJSON_IMPLEMENTATION_LASX \
+             + SIMDJSON_IMPLEMENTATION_RVV \
              + SIMDJSON_IMPLEMENTATION_FALLBACK == 1)
 
 #if SIMDJSON_SINGLE_IMPLEMENTATION
@@ -156,6 +170,9 @@ namespace internal {
 #if SIMDJSON_IMPLEMENTATION_LASX
     get_lasx_singleton();
 #endif
+#if SIMDJSON_IMPLEMENTATION_RVV
+    get_rvv_singleton();
+#endif
 #if SIMDJSON_IMPLEMENTATION_FALLBACK
     get_fallback_singleton();
 #endif
@@ -216,6 +233,9 @@ static const std::initializer_list<const implementation *>& get_available_implem
 #if SIMDJSON_IMPLEMENTATION_LASX
     get_lasx_singleton(),
 #endif
+#if SIMDJSON_IMPLEMENTATION_RVV
+    get_rvv_singleton(),
+#endif
 #if SIMDJSON_IMPLEMENTATION_FALLBACK
     get_fallback_singleton(),
 #endif

src/rvv.cpp

@@ -0,0 +1,23 @@
+#ifndef SIMDJSON_SRC_RVV_CPP
+#define SIMDJSON_SRC_RVV_CPP
+
+#ifndef SIMDJSON_CONDITIONAL_INCLUDE
+#include <base.h>
+#endif // SIMDJSON_CONDITIONAL_INCLUDE
+
+
+#include <simdjson/rvv.h>
+#include <simdjson/rvv/implementation.h>
+
+
+
+namespace simdjson {
+namespace rvv {
+error_code implementation::create_dom_parser_implementation(
+    size_t, size_t,
+    std::unique_ptr<simdjson::internal::dom_parser_implementation>&) const noexcept {
+  return error_code::UNSUPPORTED_ARCHITECTURE;
+}
+} // namespace rvv
+} // namespace simdjson
+#endif // SIMDJSON_SRC_RVV_CPP

src/simdjson.cpp

@@ -41,6 +41,9 @@ SIMDJSON_PUSH_DISABLE_UNUSED_WARNINGS
 #if SIMDJSON_IMPLEMENTATION_LASX
 #include <lasx.cpp>
 #endif
+#if SIMDJSON_IMPLEMENTATION_RVV
+#include <rvv.cpp>
+#endif
 #if SIMDJSON_IMPLEMENTATION_FALLBACK
 #include <fallback.cpp>
 #endif

tests/builder/CMakeLists.txt

@@ -2,7 +2,6 @@
 include_directories(..)
 add_cpp_test(builder_string_builder_tests              LABELS ondemand acceptance per_implementation)
 if(SIMDJSON_STATIC_REFLECTION)
-  add_cpp_test(static_reflection_custom_tests            LABELS ondemand acceptance per_implementation)
   add_cpp_test(static_reflection_builder_tests           LABELS ondemand acceptance per_implementation)
   add_cpp_test(static_reflection_comprehensive_tests     LABELS ondemand acceptance per_implementation)
   add_cpp_test(static_reflection_edge_cases_tests        LABELS ondemand acceptance per_implementation)

tests/builder/builder_string_builder_tests.cpp

@@ -331,6 +331,8 @@ namespace builder_tests {
         TEST_SUCCEED();
     }
 
+
+
     void serialize_car(const Car& car, simdjson::builder::string_builder& builder) {
         // start of JSON
         builder.start_object();
@@ -367,43 +369,7 @@ namespace builder_tests {
         builder.end_object();
     }
 
-#if SIMDJSON_SUPPORTS_CONCEPTS
-    void serialize_car_template(const Car& car, simdjson::builder::string_builder& builder) {
-        // start of JSON
-        builder.start_object();
 
-        // "make"
-        builder.append_key_value<"make">(car.make);
-        builder.append_comma();
-
-        // "model"
-        builder.append_key_value<"model">(car.model);
-
-        builder.append_comma();
-
-        // "year"
-        builder.append_key_value<"year">(car.year);
-
-        builder.append_comma();
-
-        // "tire_pressure"
-        builder.escape_and_append_with_quotes<"tire_pressure">();
-        builder.append_colon();
-        builder.start_array();
-        // vector tire_pressure
-        for (size_t i = 0; i < car.tire_pressure.size(); ++i) {
-            builder.append(car.tire_pressure[i]);
-            if (i < car.tire_pressure.size() - 1) {
-                builder.append_comma();
-            }
-        }
-        // end of array
-        builder.end_array();
-
-        // end of object
-        builder.end_object();
-    }
-#endif
     bool car_test() {
         TEST_START();
         simdjson::builder::string_builder sb;
@@ -415,18 +381,7 @@ namespace builder_tests {
         ASSERT_EQUAL(p, "{\"make\":\"Toyota\",\"model\":\"Corolla\",\"year\":2017,\"tire_pressure\":[30.0,30.2,30.513,30.79]}");
         TEST_SUCCEED();
     }
-#if SIMDJSON_SUPPORTS_CONCEPTS
+    #if SIMDJSON_SUPPORTS_CONCEPTS
-    bool car_test_template() {
-        TEST_START();
-        simdjson::builder::string_builder sb;
-        Car c = {"Toyota", "Corolla", 2017, {30.0,30.2,30.513,30.79}};
-        serialize_car_template(c, sb);
-        std::string_view p;
-        auto result = sb.view().get(p);
-        ASSERT_SUCCESS(result);
-        ASSERT_EQUAL(p, "{\"make\":\"Toyota\",\"model\":\"Corolla\",\"year\":2017,\"tire_pressure\":[30.0,30.2,30.513,30.79]}");
-        TEST_SUCCEED();
-    }
     bool serialize_optional() {
         TEST_START();
         simdjson::builder::string_builder sb;
@@ -444,7 +399,7 @@ namespace builder_tests {
         ASSERT_EQUAL(p, "null");
         TEST_SUCCEED();
     }
-#endif
+    #endif
 
     #if SIMDJSON_SUPPORTS_RANGES && SIMDJSON_SUPPORTS_CONCEPTS
     void serialize_car_simple(const Car& car, simdjson::builder::string_builder& builder) {
@@ -519,20 +474,6 @@ namespace builder_tests {
         ASSERT_EQUAL(s, "[[1.0,2.0],[3.0,4.0]]");
         TEST_SUCCEED();
     }
-    bool double_double_test_to_string() {
-        TEST_START();
-        std::vector<std::vector<double>> c = {{1.0, 2.0}, {3.0, 4.0}};
-        simdjson::builder::string_builder sb;
-        sb.append(c);
-        std::string_view p;
-        auto result = sb.view().get(p);
-        ASSERT_SUCCESS(result);
-        ASSERT_EQUAL(p, "[[1.0,2.0],[3.0,4.0]]");
-        std::string s;
-        simdjson::simdjson_error ec = simdjson::to_json(c,s);
-        ASSERT_EQUAL(s, "[[1.0,2.0],[3.0,4.0]]");
-        TEST_SUCCEED();
-    }
     #if SIMDJSON_EXCEPTIONS
     bool car_test_simple_complete_exceptions() {
         TEST_START();
@@ -581,7 +522,6 @@ namespace builder_tests {
     #if SIMDJSON_SUPPORTS_RANGES && SIMDJSON_SUPPORTS_CONCEPTS
             map_test() &&
             double_double_test() &&
-            double_double_test_to_string() &&
             car_test_simple() &&
             car_test_simple_complete() &&
         #if SIMDJSON_EXCEPTIONS
@@ -589,7 +529,6 @@ namespace builder_tests {
         #endif
     #endif
     #if SIMDJSON_SUPPORTS_CONCEPTS
-            car_test_template() &&
            serialize_optional() &&
     #endif
             append_char() &&

tests/builder/static_reflection_custom_tests.cpp

@@ -1,138 +0,0 @@
-
-
-
-#include "simdjson.h"
-#include "test_builder.h"
-#include <charconv>
-#include <string>
-
-using namespace simdjson;
-
-// Suppose that we want to serialize/deserialize Car using
-// strings for the year
-struct Car {
-  std::string make;
-  std::string model;
-  int64_t year;
-  std::vector<float> tire_pressure;
-};
-
-
-
-namespace simdjson {
-// This tag_invoke MUST be inside simdjson namespace
-template <typename simdjson_value>
-auto tag_invoke(deserialize_tag, simdjson_value &val, Car& car) {
-  ondemand::object obj;
-  auto error = val.get_object().get(obj);
-  if (error) {
-    return error;
-  }
-  if ((error = obj["make"].get_string(car.make))) {
-    return error;
-  }
-  if ((error = obj["model"].get_string(car.model))) {
-    return error;
-  }
-  std::string_view year_str;
-  if ((error = obj["year"].get(year_str))) {
-    return error;
-  }
-  int64_t year_value;
-  auto [ptr, ec] = std::from_chars(year_str.data(), year_str.data() + year_str.size(), year_value);
-  if (ec != std::errc{}) {
-    return INCORRECT_TYPE;
-  }
-  car.year = year_value;
-  if ((error = obj["tire_pressure"].get<std::vector<float>>().get(
-           car.tire_pressure))) {
-    return error;
-  }
-  return simdjson::SUCCESS;
-}
-
-template <typename builder_type>
-void tag_invoke(serialize_tag, builder_type &builder, const Car& car) {
-  builder.start_object();
-  builder.append_key_value("make", car.make);
-  builder.append_comma();
-  builder.append_key_value("model", car.model);
-  builder.append_comma();
-  builder.append_key_value("year", std::to_string(car.year));
-  builder.append_comma();
-  builder.append_key_value("tire_pressure", car.tire_pressure);
-  builder.end_object();
-}
-
-} // namespace simdjson
-namespace custom_tests {
-
-  bool test_car_deserialization() {
-    TEST_START();
-    auto json = R"({"make":"Toyota","model":"Camry","year":"2018","tire_pressure":[30.5,30.6,30.7,30.8]})"_padded;
-    ondemand::parser parser;
-    auto doc_result = parser.iterate(json);
-    ASSERT_SUCCESS(doc_result);
-    Car car;
-    ASSERT_SUCCESS(doc_result.get(car));
-    if (car.make != "Toyota" || car.model != "Camry" || std::to_string(car.year) != "2018" || car.tire_pressure.size() != 4 || car.tire_pressure[0] != 30.5f) {
-      return false;
-    }
-    TEST_SUCCEED();
-  }
-  bool test_car_serialization() {
-    TEST_START();
-    Car car{"Toyota", "Camry", 2018, {30.5f,30.6f,30.7f,30.8f}};
-    simdjson::builder::string_builder builder;
-    builder.append(car);
-    std::string_view json;
-    ASSERT_SUCCESS(builder.view().get(json));
-    TEST_SUCCEED();
-  }
-  bool test_car_roundtrip() {
-    TEST_START();
-    Car car{"Toyota", "Camry", 2018, {30.5f,30.6f,30.7f,30.8f}};
-    simdjson::builder::string_builder builder;
-    builder.append(car);
-    std::string json;
-    ASSERT_SUCCESS(builder.view().get(json));
-    ondemand::parser parser;
-    auto doc_result = parser.iterate(json);
-    ASSERT_SUCCESS(doc_result);
-    Car carback;
-    ASSERT_SUCCESS(doc_result.get(carback));
-
-    if (carback.make != car.make || carback.model != car.model || carback.year != car.year || carback.tire_pressure != car.tire_pressure) {
-      return false;
-    }
-
-    TEST_SUCCEED();
-  }
-
-  bool test_car_roundtrip_to_json() {
-    TEST_START();
-    Car car{"Toyota", "Camry", 2018, {30.5f,30.6f,30.7f,30.8f}};
-    std::string json;
-    ASSERT_SUCCESS(simdjson::to_json(car).get(json));
-    simdjson::builder::string_builder builder;
-    ondemand::parser parser;
-    auto doc_result = parser.iterate(json);
-    ASSERT_SUCCESS(doc_result);
-    Car carback;
-    ASSERT_SUCCESS(doc_result.get(carback));
-
-    if (carback.make != car.make || carback.model != car.model || carback.year != car.year || carback.tire_pressure != car.tire_pressure) {
-      return false;
-    }
-
-    TEST_SUCCEED();
-  }
-  bool run() {
-    return test_car_deserialization() && test_car_serialization() && test_car_roundtrip() && test_car_roundtrip_to_json();
-  }
-
-} // namespace builder_tests
-
-int main(int argc, char *argv[]) {
-  return test_main(argc, argv, custom_tests::run);
-}

tests/dom/CMakeLists.txt

@@ -123,7 +123,7 @@ endif()
 
 # Add the tests if we're on:
 #   1. Visual Studio 2022 v17.6 or later
-#   2. GCC v14.0.0 or later (GCC v13.0.0 cannot handle pipe operator of lambda)
+#   2. GCC v14.0.0 or later (GCC v13.0.0 cannot handle pipe oprator of lambda)
 #   3. Clang v15.0.0 or later (certain version C++ headers occur error when compiling)
 if(
   (MSVC AND MSVC_VERSION LESS 1930) OR

tests/ondemand/ondemand_convert_tests.cpp

@@ -2,7 +2,6 @@
 #include "simdjson/convert.h"
 #include "test_ondemand.h"
 
-#include <chrono>
 #include <map>
 #include <ranges>
 #include <string>
@@ -22,24 +21,6 @@ private:
     std::string date_str;
 };
 
-
-struct Meeting {
-    std::string title;
-    std::vector<std::string> attendees;
-    std::optional<std::string> location;
-    bool is_recurring;
-};
-
-
-struct MeetingTime {
-    std::string title;
-    std::chrono::system_clock::time_point start_time;
-    std::vector<std::string> attendees;
-    std::optional<std::string> location;
-    bool is_recurring;
-};
-
-
 namespace simdjson {
 template <typename simdjson_value>
 auto tag_invoke(deserialize_tag, simdjson_value &val, MyDate& date) {
@@ -62,25 +43,8 @@ struct complicated_weather_data {
 #ifdef __cpp_lib_ranges
 
 namespace convert_tests {
-
+#if SIMDJSON_EXCEPTIONS && SIMDJSON_SUPPORTS_CONCEPTS
-simdjson::padded_string json_car =
+struct Car {
-    R"( {
-         "make": "Toyota",
-         "model": "Camry",
-         "year": 2018,
-         "tire_pressure": [ 40.1, 39.9 ]
-       } )"_padded;
-simdjson::padded_string json_cars =
-    R"( [ { "make": "Toyota", "model": "Camry",  "year": 2018,
-       "tire_pressure": [ 40.1, 39.9 ] },
-  { "make": "Kia",    "model": "Soul",   "year": 2012,
-       "tire_pressure": [ 30.1, 31.0 ] },
-  { "make": "Toyota", "model": "Tercel", "year": 1999,
-       "tire_pressure": [ 29.8, 30.0 ] }
-])"_padded;
-
-#if SIMDJSON_SUPPORTS_CONCEPTS
-  struct Car {
   std::string make{};
   std::string model{};
   int year{};
@@ -125,68 +89,44 @@ simdjson::padded_string json_cars =
     }
     return simdjson::SUCCESS;
   }
-  };
+};
 
-  static_assert(simdjson::custom_deserializable<std::unique_ptr<Car>>,
+static_assert(simdjson::custom_deserializable<std::unique_ptr<Car>>,
               "It should be deserializable");
 
 
-  bool simple_no_except() {
+simdjson::padded_string json_car =
-    TEST_START();
+    R"( {
-    Car car;
+         "make": "Toyota",
-    ASSERT_SUCCESS(simdjson::from(json_car).get(car));
+         "model": "Camry",
-    if (car.make != "Toyota" || car.model != "Camry" || car.year != 2018) {
+         "year": 2018,
-      return false;
+         "tire_pressure": [ 40.1, 39.9 ]
-    }
+       } )"_padded;
-    TEST_SUCCEED();
+simdjson::padded_string json_cars =
-  }
+    R"( [ { "make": "Toyota", "model": "Camry",  "year": 2018,
-#endif // SIMDJSON_SUPPORTS_CONCEPTS
+       "tire_pressure": [ 40.1, 39.9 ] },
-#if SIMDJSON_EXCEPTIONS && SIMDJSON_SUPPORTS_CONCEPTS
+  { "make": "Kia",    "model": "Soul",   "year": 2012,
+       "tire_pressure": [ 30.1, 31.0 ] },
+  { "make": "Toyota", "model": "Tercel", "year": 1999,
+       "tire_pressure": [ 29.8, 30.0 ] }
+])"_padded;
 
-  bool simple() {
+bool simple() {
   TEST_START();
   Car car = simdjson::from(json_car);
   if (car.make != "Toyota" || car.model != "Camry" || car.year != 2018) {
     return false;
   }
   TEST_SUCCEED();
-  }
+}
-  struct Player {
+
-      std::string username;
+
-      int level;
-      double health;
-  };
   struct BadPlayer {
       int username;  // Oops, should be string!
       int level;
       double health;
   };
-  struct OptionalPlayer {
-      std::string username;
-      std::optional<int> level;
-      double health;
-  };
 #if SIMDJSON_STATIC_REFLECTION
-  bool missing_key_player() {
-    TEST_START();
-    std::string json = R"({"username":"Alice","health":100.0})";
-    simdjson::padded_string padded(json);
-    Player p;
-    simdjson::ondemand::parser parser;
-    auto doc = parser.iterate(padded);
-    ASSERT_ERROR(doc.get(p), simdjson::NO_SUCH_FIELD);
-    TEST_SUCCEED();
-  }
-  bool missing_key_optional_player() {
-    TEST_START();
-    std::string json = R"({"username":"Alice","health":100.0})";
-    simdjson::padded_string padded(json);
-    OptionalPlayer p;
-    simdjson::ondemand::parser parser;
-    auto doc = parser.iterate(padded);
-    ASSERT_SUCCESS(doc.get(p));
-    TEST_SUCCEED();
-  }
   bool bad_player() {
     TEST_START();
     // username is a string but we declared it as an int
@@ -220,38 +160,6 @@ simdjson::padded_string json_cars =
     ASSERT_SUCCESS(doc.get(p));
     TEST_SUCCEED();
   }
-
-
-  bool meeting_test() {
-    TEST_START();
-    std::string json = simdjson::to_json(Meeting{
-        .title = "CppCon Planning",
-        .attendees = {"Alice", "Bob", "Charlie"},
-        .location = "Denver",
-        .is_recurring = true
-    });
-    Meeting m2 = simdjson::from(json);
-    std::cout << m2.title << std::endl;
-    TEST_SUCCEED();
-  }
-  bool meeting_time_test() {
-    TEST_START();
-    auto start_time = std::chrono::system_clock::now();
-    std::string json = simdjson::to_json(MeetingTime{
-        .title = "CppCon Planning",
-        .start_time = start_time,
-        .attendees = {"Alice", "Bob", "Charlie"},
-        .location = "Denver",
-        .is_recurring = true
-    });
-    std::cout << json << std::endl;
-    MeetingTime m2 = simdjson::from(json);
-    //ASSERT_EQUAL(m2.start_time, start_time);
-    std::cout << m2.title << std::endl;
-    TEST_SUCCEED();
-  }
-
-
 #endif
 bool broken() {
   TEST_START();
@@ -507,10 +415,7 @@ bool test_to_vs_from_equivalence() {
 bool run() {
   return
 #if SIMDJSON_STATIC_REFLECTION
-      missing_key_optional_player() && missing_key_player() && meeting_time_test() && meeting_test() && bad_player() && good_player() && complicated_weather_test() &&
+      bad_player() && good_player() && complicated_weather_test() &&
-#endif
-#if SIMDJSON_SUPPORTS_CONCEPTS
-      simple_no_except() &&
 #endif
 #if SIMDJSON_EXCEPTIONS && SIMDJSON_SUPPORTS_CONCEPTS
       broken() && simple() && simple_optional() && with_parser() && to_array() &&