bors f9515fdd5a Auto merge of #126473 - matthiaskrgr:rollup-8w2xm09, r=matthiaskrgr
Rollup of 7 pull requests

Successful merges:

 - #123769 (Improve escaping of byte, byte str, and c str proc-macro literals)
 - #126054 (`E0229`: Suggest Moving Type Constraints to Type Parameter Declaration)
 - #126135 (add HermitOS support for vectored read/write operations)
 - #126266 (Unify guarantees about the default allocator)
 - #126285 (`UniqueRc`: support allocators and `T: ?Sized`.)
 - #126399 (extend the check for LLVM build)
 - #126426 (const validation: fix ICE on dangling ZST reference)

r? `@ghost`
`@rustbot` modify labels: rollup
2024-06-14 11:29:58 +00:00
..
2024-06-13 12:24:31 +02:00
2024-06-13 14:43:16 +02:00
2024-06-07 08:33:58 +00:00
2024-06-13 20:22:21 +00:00

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>.