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implementation of https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2023/p2497r0.html

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This commit is contained in:
Daniel Lemire 2025-05-19 18:08:36 -04:00
parent b8085ba363
commit 81b8306c5f
3 changed files with 12 additions and 16 deletions
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2
CMakeLists.txt
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@ -1,4 +1,4 @@
cmake_minimum_required(VERSION 3.9) cmake_minimum_required(VERSION 3.14)
project(fast_float VERSION 8.0.2 LANGUAGES CXX) project(fast_float VERSION 8.0.2 LANGUAGES CXX)
set(FASTFLOAT_CXX_STANDARD 11 CACHE STRING "the C++ standard to use for fastfloat") set(FASTFLOAT_CXX_STANDARD 11 CACHE STRING "the C++ standard to use for fastfloat")

5
include/fast_float/float_common.h
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@ -58,6 +58,11 @@ enum class chars_format : uint64_t {
template <typename UC> struct from_chars_result_t { template <typename UC> struct from_chars_result_t {
UC const *ptr; UC const *ptr;
std::errc ec; std::errc ec;
// https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2023/p2497r0.html
constexpr explicit operator bool() const noexcept {
return ec == std::errc();
}
}; };
using from_chars_result = from_chars_result_t<char>; using from_chars_result = from_chars_result_t<char>;

17
tests/CMakeLists.txt
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@ -10,7 +10,7 @@ option(FASTFLOAT_SUPPLEMENTAL_TESTS "Run supplemental tests" ON)
if (NOT SYSTEM_DOCTEST) if (NOT SYSTEM_DOCTEST)
FetchContent_Declare(doctest FetchContent_Declare(doctest
GIT_REPOSITORY https://github.com/onqtam/doctest.git GIT_REPOSITORY https://github.com/onqtam/doctest.git
GIT_TAG v2.4.11) GIT_TAG v2.4.12)
else () else ()
find_package(doctest REQUIRED) find_package(doctest REQUIRED)
endif() endif()
@ -23,24 +23,15 @@ endif()
# FetchContent_MakeAvailable() was only introduced in 3.14 # FetchContent_MakeAvailable() was only introduced in 3.14
# https://cmake.org/cmake/help/v3.14/release/3.14.html#modules # https://cmake.org/cmake/help/v3.14/release/3.14.html#modules
# FetchContent_MakeAvailable(doctest)
if (NOT SYSTEM_DOCTEST) if (NOT SYSTEM_DOCTEST)
FetchContent_GetProperties(doctest) FetchContent_MakeAvailable(doctest)
if(NOT doctest_POPULATED)
FetchContent_Populate(doctest)
add_subdirectory(${doctest_SOURCE_DIR} ${doctest_BINARY_DIR})
endif()
endif() endif()
add_library(supplemental-data INTERFACE) add_library(supplemental-data INTERFACE)
if (FASTFLOAT_SUPPLEMENTAL_TESTS) if (FASTFLOAT_SUPPLEMENTAL_TESTS)
FetchContent_GetProperties(supplemental_test_files)
if(NOT supplemental_test_files_POPULATED)
message(STATUS "Supplemental tests enabled. Retrieving test files.") message(STATUS "Supplemental tests enabled. Retrieving test files.")
FetchContent_Populate(supplemental_test_files) FetchContent_MakeAvailable(supplemental_test_files)
message(STATUS "Supplemental test files retrieved.") message(STATUS "Supplemental test files retrieved.")
add_subdirectory(${supplemental_test_files_SOURCE_DIR} ${supplemental_test_files_BINARY_DIR})
endif()
target_compile_definitions(supplemental-data INTERFACE SUPPLEMENTAL_TEST_DATA_DIR="${supplemental_test_files_BINARY_DIR}/data") target_compile_definitions(supplemental-data INTERFACE SUPPLEMENTAL_TEST_DATA_DIR="${supplemental_test_files_BINARY_DIR}/data")
endif() endif()
@ -82,7 +73,7 @@ endif()
if (FASTFLOAT_SUPPLEMENTAL_TESTS) if (FASTFLOAT_SUPPLEMENTAL_TESTS)
target_compile_definitions(basictest PRIVATE FASTFLOAT_SUPPLEMENTAL_TESTS) target_compile_definitions(basictest PRIVATE FASTFLOAT_SUPPLEMENTAL_TESTS)
endif() endif()
fast_float_add_cpp_test(p2497)
fast_float_add_cpp_test(long_test) fast_float_add_cpp_test(long_test)
fast_float_add_cpp_test(powersoffive_hardround) fast_float_add_cpp_test(powersoffive_hardround)
fast_float_add_cpp_test(string_test) fast_float_add_cpp_test(string_test)