Drop custom from_chars for constexpr use, required in C++23 (#2430) #3356

	name: exhaustive float json tests

	on:
	push:
	branches:
	- main
	- feature/*
	paths-ignore:
	- '*/.md'
	- 'docs/**'
	pull_request:
	branches:
	- main
	paths-ignore:
	- '*/.md'
	- 'docs/**'
	workflow_dispatch:

	jobs:
	build:
	runs-on: ubuntu-24.04

	strategy:
	fail-fast: false
	matrix:
	clang: [18]
	build_type: [Release]
	std: [23]

	env:
	CC: clang-${{matrix.clang}}
	CXX: clang++-${{matrix.clang}}

	steps:
	- uses: actions/checkout@v6

	- name: Install dependencies
	run: \|
	sudo apt-get update
	sudo apt-get install -y libc++-dev libc++abi-dev

	- name: Configure CMake
	run: \|
	cmake -B ${{github.workspace}}/build \
	-DCMAKE_BUILD_TYPE=${{matrix.build_type}} \
	-DCMAKE_CXX_STANDARD=${{matrix.std}} \
	-DCMAKE_C_COMPILER=${{env.CC}} \
	-DCMAKE_CXX_COMPILER=${{env.CXX}} \
	-DCMAKE_CXX_FLAGS="-stdlib=libc++" \
	-DBUILD_TESTING=Off

	- name: Build
	run: cmake --build build -j $(nproc)

	- name: Test
	working-directory: build
	run: \|
	set -e
	fuzzing/json_exhaustive_roundtrip_float

	echo all is OK!

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