Files
rust/tests/ui
bors ff7906bfe1 Auto merge of #134096 - fmease:rollup-0asgoo8, r=fmease
Rollup of 9 pull requests

Successful merges:

 - #133996 (Move most tests for `-l` and `#[link(..)]` into `tests/ui/link-native-libs`)
 - #134012 (Grammar fixes)
 - #134032 (docs: better examples for `std::ops::ControlFlow`)
 - #134040 (bootstrap: print{ln}! -> eprint{ln}! (take 2))
 - #134043 (Add test to check unicode identifier version)
 - #134053 (rustdoc: rename `issue-\d+.rs` tests to have meaningful names (part 10))
 - #134055 (interpret: clean up deduplicating allocation functions)
 - #134073 (dataflow_const_prop: do not eval a ptr address in SwitchInt)
 - #134084 (Fix typo in RFC mention 3598 -> 3593)

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>.