Add xsimd::get<>() for optimized compile-time element extraction #4318

	name: macOS build
	on: [push, pull_request]
	concurrency:
	group: ${{ github.workflow }}-${{ github.job }}-${{ github.ref }}
	cancel-in-progress: true

	jobs:
	build:
	strategy:
	matrix:
	os:
	- 14
	- 15
	- 15-intel
	runs-on: macos-${{ matrix.os }}
	name: 'macos-${{ matrix.os }}'
	steps:
	- uses: actions/checkout@v6
	- name: Setup
	run: cmake -B _build -DBUILD_TESTS=ON -DDOWNLOAD_DOCTEST=ON -DBUILD_BENCHMARK=ON -DBUILD_EXAMPLES=ON -DCMAKE_BUILD_TYPE=Release -DCMAKE_OSX_ARCHITECTURES="arm64;x86_64"
	- name: Build
	run: cmake --build _build --verbose
	- name: Testing sequential
	run: cmake --build _build --target xbenchmark --verbose
	- name: Set CPU feature test expectations
	run: \|
	if echo '${{ matrix.os }}' \| grep -q intel; then
	echo "XSIMD_TEST_CPU_ASSUME_NEON64=0" >> "$GITHUB_ENV"
	echo "XSIMD_TEST_CPU_ASSUME_SSE4_2=1" >> "$GITHUB_ENV"
	echo "XSIMD_TEST_CPU_ASSUME_MANUFACTURER=intel" >> "$GITHUB_ENV"
	else
	echo "XSIMD_TEST_CPU_ASSUME_NEON64=1" >> "$GITHUB_ENV"
	echo "XSIMD_TEST_CPU_ASSUME_SSE4_2=0" >> "$GITHUB_ENV"
	echo "XSIMD_TEST_CPU_ASSUME_MANUFACTURER=unknown" >> "$GITHUB_ENV"
	fi
	- name: Testing xsimd
	run: ${{github.workspace}}/_build/test/test_xsimd

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