Files
rust/tests/ui
bors f5729cfed3 Auto merge of #137573 - compiler-errors:rollup-noq9yhp, r=compiler-errors
Rollup of 11 pull requests

Successful merges:

 - #136522 (Remove `feature(dyn_compatible_for_dispatch)` from the compiler)
 - #137289 (Consolidate and improve error messaging for `CoerceUnsized` and `DispatchFromDyn`)
 - #137321 (Correct doc about `temp_dir()` behavior on Android)
 - #137417 (rustc_target: Add more RISC-V atomic-related features)
 - #137489 (remove `#[rustc_intrinsic_must_be_overridde]`)
 - #137530 (DWARF mixed versions with LTO on MIPS)
 - #137543 (std: Fix another new symlink test on Windows)
 - #137548 (Pass correct `TypingEnv` to `InlineAsmCtxt`)
 - #137550 (Don't immediately panic if dropck fails without returning errors)
 - #137552 (Update books)
 - #137556 (rename simd_shuffle_generic → simd_shuffle_const_generic)

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>.