Files
rust/tests/ui
bors 4cadeda932 Auto merge of #130768 - compiler-errors:rollup-8ncjy55, r=compiler-errors
Rollup of 7 pull requests

Successful merges:

 - #129545 (rustdoc: redesign toolbar and disclosure widgets)
 - #130618 (Skip query in get_parent_item when possible.)
 - #130727 (Check vtable projections for validity in miri)
 - #130750 (Add new Tier-3 target: `loongarch64-unknown-linux-ohos`)
 - #130758 (Revert "Add recursion limit to FFI safety lint")
 - #130759 (Update books)
 - #130762 (stabilize const_intrinsic_copy)

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>.