Files
rust/tests/ui
bors 905b1bf1cc Auto merge of #137010 - workingjubilee:rollup-g00c07v, r=workingjubilee
Rollup of 9 pull requests

Successful merges:

 - #135439 (Make `-O` mean `OptLevel::Aggressive`)
 - #136460 (Simplify `rustc_span` `analyze_source_file`)
 - #136904 (add `IntoBounds` trait)
 - #136908 ([AIX] expect `EINVAL` for `pthread_mutex_destroy`)
 - #136924 (Add profiling of bootstrap commands using Chrome events)
 - #136951 (Use the right binder for rebinding `PolyTraitRef`)
 - #136981 (ci: switch loongarch jobs to free runners)
 - #136992 (Update backtrace)
 - #136993 ([cg_llvm] Remove dead error message)

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 interpret a test.

As part of an ongoing 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 a legacy compiletest-style test header. To fix this, you should migrate to the ui_test-style header //@ <content>.