make repeated 'using X ;' a no-op #142

	# Copyright 2023 Nikita Kniazev
	#
	# Use, modification, and distribution are subject to the
	# Boost Software License, Version 1.0. (See accompanying file LICENSE.txt)

	name: "Extra Tests"

	on:
	push:
	paths-ignore: #&paths
	- '.circleci/**'
	- '.cirrus.yml'
	- '.drone.star'
	- '.semaphore/**'
	- '.travis.yml'
	- 'appveyor.yml'
	- 'azure-pipelines.yml'
	- '.ci/azp-*.yml'
	pull_request:
	paths-ignore: #*paths #https://github.com/actions/runner/issues/1182
	- '.circleci/**'
	- '.cirrus.yml'
	- '.drone.star'
	- '.semaphore/**'
	- '.travis.yml'
	- 'appveyor.yml'
	- 'azure-pipelines.yml'
	- '.ci/azp-*.yml'

	concurrency:
	# cancel test runners on force-push in pull requests
	group: ${{ github.event_name == 'push' && github.event.forced && github.head_ref \|\| github.run_id }}
	cancel-in-progress: true

	jobs:
	msys2:
	name: Windows msys2 ${{matrix.msys}} ${{matrix.toolset}}
	runs-on: windows-latest
	strategy:
	fail-fast: false
	matrix:
	msys:
	- mingw64
	- mingw32
	- ucrt64
	- clang64
	toolset:
	- clang
	- gcc
	defaults:
	run:
	shell: msys2 {0}
	steps:
	- name: Checkout
	uses: actions/checkout@master

	- name: Install Toolset
	uses: msys2/setup-msys2@v2
	with:
	msystem: ${{matrix.msys}}
	pacboy: python:p ${{matrix.toolset}}:p

	- name: Bootstrap
	run: ./bootstrap.sh ${{matrix.toolset}}

	- name: Test
	working-directory: test
	env: { PYTHONUTF8: 1 }
	run: ./test_all.py ${{matrix.toolset}}

	- name: 'No Warnings'
	run: ./b2 warnings=all warnings-as-errors=on variant=debug,release debug-symbols=off toolset=${{matrix.toolset}} b2

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