Files
rust/tests/ui
bors 10a7aa14fe Auto merge of #123128 - GuillaumeGomez:rollup-3l3zu6s, r=GuillaumeGomez
Rollup of 6 pull requests

Successful merges:

 - #121843 (Implement `-L KIND=`@RUSTC_BUILTIN/...`)`
 - #122860 (coverage: Re-enable `UnreachablePropagation` for coverage builds)
 - #123021 (Make `TyCtxt::coroutine_layout` take coroutine's kind parameter)
 - #123024 (CFI: Enable KCFI testing of run-pass tests)
 - #123083 (lib: fix some unnecessary_cast clippy lint)
 - #123116 (rustdoc: Swap fields and variant documentations)

r? `@ghost`
`@rustbot` modify labels: rollup
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UI Tests

This folder contains rustc's UI tests.

Test Directives (Headers)

Typically, a UI test will have some test directives / headers which are special comments that tell compiletest how to build and intepret a test.

As part of an on-going effort to rewrite compiletest (see https://github.com/rust-lang/compiler-team/issues/536), a major change proposal to change legacy compiletest-style headers // <directive> to ui_test-style headers //@ <directive> was accepted (see https://github.com/rust-lang/compiler-team/issues/512.

An example directive is ignore-test. In legacy compiletest style, the header would be written as

// ignore-test

but in ui_test style, the header would be written as

//@ ignore-test

compiletest is changed to accept only //@ directives for UI tests (currently), and will reject and report an error if it encounters any comments // <content> that may be parsed as an legacy compiletest-style test header. To fix this, you should migrate to the ui_test-style header //@ <content>.