fix negate with overflow, unsure why #[repr(C)] fixes it #539

	on: [push, pull_request]

	name: CI

	jobs:
	lint:
	name: Lint
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v1
	- uses: actions-rs/toolchain@v1
	with:
	toolchain: stable
	override: true

	# make sure all code has been formatted with rustfmt
	- run: rustup component add rustfmt
	- name: check rustfmt
	uses: actions-rs/cargo@v1
	with:
	command: fmt
	args: -- --check --color always

	build_and_test:
	name: Test
	strategy:
	matrix:
	os: [ubuntu-latest, windows-latest, macOS-latest]
	runs-on: ${{ matrix.os }}
	steps:
	- if: matrix.os == 'ubuntu-latest'
	run: sudo apt install libwayland-cursor0 libxkbcommon-dev libwayland-dev
	- uses: actions/checkout@v1
	- uses: actions-rs/toolchain@v1
	with:
	toolchain: stable
	override: true
	- name: cargo fetch
	uses: actions-rs/cargo@v1
	with:
	command: fetch
	- name: cargo test build
	uses: actions-rs/cargo@v1
	with:
	command: build
	args: --tests
	- name: cargo test
	uses: actions-rs/cargo@v1
	with:
	command: test

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