Files
rust/tests/ui
Matthias Krüger 07bd4590fb Rollup merge of #121875 - estebank:e0277-drive-by, r=compiler-errors
Account for unmet T: !Copy in E0277 message

```
error[E0277]: the trait bound `T: !Copy` is not satisfied
  --> $DIR/simple.rs:10:16
   |
LL |     not_copy::<T>();
   |                ^ the trait bound `T: !Copy` is not satisfied
```
instead of the current

```
error[E0277]: the trait bound `T: !Copy` is not satisfied
  --> $DIR/simple.rs:10:16
   |
LL |     not_copy::<T>();
   |                ^ the trait `!Copy` is not implemented for `T`
```
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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>.