flake.nix instead of shell.nix #36

	name: hffix test

	# Controls when the action will run. Triggers the workflow on push
	on:
	push:
	branches:
	- master
	pull_request:
	# release:
	# tags:
	# - 'v' # Push events to matching v, i.e. v1.0, v20.15.10

	jobs:
	test:
	runs-on:
	- ubuntu-latest
	strategy:
	fail-fast: false
	matrix:
	compiler:
	- cxx: "g++"
	# https://stackoverflow.com/questions/76859275/error-compiling-a-cpp-containing-stdchrono-errorstatic-constexpr-unsigned-fra
	- cxx: "clang++ -stdlib=libc++"
	flags:
	- cxxflags: "-std=c++98"
	- cxxflags: "-std=c++11"
	- cxxflags: "-std=c++17"
	- cxxflags: "-std=c++20"
	steps:
	- name: Checkout
	uses: actions/checkout@v3
	- name: Install Boost
	uses: MarkusJx/install-boost@v2.4.5
	id: install-boost
	with:
	boost_version: 1.83.0
	- name: Test
	# Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
	shell: bash
	env:
	CPLUS_INCLUDE_PATH: ${{steps.install-boost.outputs.BOOST_ROOT}}/include
	LIBRARY_PATH: ${{steps.install-boost.outputs.BOOST_ROOT}}/lib
	CXX: ${{matrix.compiler.cxx}}
	CXXFLAGS: ${{matrix.flags.cxxflags}}
	run: \|
	$CXX --version
	make test

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