migrate to c++20 #1012

	name: Ubuntu 22.04 (Release build)

	on:
	pull_request:
	types: [opened, synchronize, reopened, ready_for_review]
	paths-ignore:
	- '**.md'
	- 'docs/**'
	push:
	branches:
	- main
	paths-ignore:
	- '**.md'
	- 'docs/**'

	permissions:
	contents: read

	concurrency:
	group: ${{ github.workflow }}-${{ github.ref }}
	cancel-in-progress: true

	jobs:
	ubuntu-release-build:
	runs-on: ubuntu-22.04
	strategy:
	matrix:
	cxx: [g++-12, clang++-14]
	steps:
	- uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
	- name: Setup Ninja
	run: sudo apt-get install ninja-build
	- name: Prepare
	run: cmake -DBUILD_TESTING=OFF -DCMAKE_BUILD_TYPE=Release -G Ninja -B build
	env:
	CXX: ${{matrix.cxx}}
	- name: Build
	run: cmake --build build -j=2
	- name: Test
	run: ctest --output-on-failure --test-dir build

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