Add documentation to `Expr` enum. #67

	name: Rust

	on:
	push:
	branches: [ "**" ]

	env:
	CARGO_TERM_COLOR: always

	jobs:
	build:
	runs-on: ubuntu-latest
	environment: CC

	steps:
	- uses: actions/checkout@v3
	- name: Verify parser up to date
	run: ./scripts/verify_parser_up_to_date.sh
	- name: Build workspace
	run: cargo build --workspace --release
	- name: Cargo fmt
	run: cargo fmt --check
	- name: Cargo clippy
	run: cargo clippy --release -- -D warnings
	- name: Run tests
	run: cargo test --release
	- name: Run regression tests
	env:
	MONGO_PW: ${{ secrets.MONGO_PW }}
	MONGO_ADDRESS: ${{ secrets.MONGO_ADDRESS }}
	run: cargo run -p bencher --release -- --read --write

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