more c++20 changes #310

	name: Ubuntu aarch64 (GCC 12)

	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:
	build:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
	- uses: uraimo/run-on-arch-action@b0ffb25eb00af00468375982384441f063da1741 # v2.7.2
	name: Build and Test
	id: runcmd
	with:
	arch: aarch64
	githubToken: ${{ github.token }}
	distro: ubuntu22.04
	install: \|
	apt-get update -q -y
	apt-get install -y cmake make g++-12 ninja-build git gcc-12
	ln -s -f /usr/bin/gcc-12 /usr/bin/gcc
	ln -s -f /usr/bin/g++-12 /usr/bin/g++
	run: \|
	cmake -DCMAKE_CXX_STANDARD=20 -B build
	cmake --build build
	ctest --test-dir build

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