Port #[rustc_test_marker] to the attribute parser Tracking issue: https://github.com/rust-lang/rust/issues/131229 Targets: Const is for normal tests (const test::TestDescAndFn is inserted before the test fn) Const/Static/Fn is for custom_test_framework's #[test_case] e.g. tests/ui/custom_test_frameworks/full.rs r? @JonathanBrouwer Again I left the use-sites as is since they are early uses.