Files
rust/tests/ui
Matthias Krüger b07fa7696b Rollup merge of #136284 - oli-obk:push-zsxuwnzmonnl, r=lcnr
Allow using named consts in pattern types

This required a refactoring first: I had to stop using `hir::Pat`in `hir::TyKind::Pat` and instead create a separate `TyPat` that has `ConstArg` for range ends instead of `PatExpr`. Within the type system we should be using `ConstArg` for all constants, as otherwise we'd be maintaining two separate const systems that could diverge. The big advantage of this PR is that we now inherit all the rules from const generics and don't have a separate system. While this makes things harder for users (const generic rules wrt what is allowed in those consts), it also means we don't accidentally allow some things like referring to assoc consts or doing math on generic consts.
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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>.