Files
rust/tests/ui
bors d7ea27808d Auto merge of #124703 - matthiaskrgr:rollup-2lljptd, r=matthiaskrgr
Rollup of 8 pull requests

Successful merges:

 - #123356 (Reduce code size of `thread::set_current`)
 - #124159 (Move thread parking to `sys::sync`)
 - #124293 (Let miri and const eval execute intrinsics' fallback bodies)
 - #124677 (Set non-leaf frame pointers on Fuchsia targets)
 - #124692 (We do not coerce `&mut &mut T -> *mut mut T`)
 - #124698 (Rewrite `rustdoc-determinism` test in Rust)
 - #124700 (Remove an unnecessary cast)
 - #124701 (Docs: suggest `uN::checked_sub` instead of check-then-unchecked)

r? `@ghost`
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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>.