Rescope temp lifetime in if-let into IfElse with migration lint Tracking issue #124085 This PR shortens the temporary lifetime to cover only the pattern matching and consequent branch of a `if let`. At the expression location, means that the lifetime is shortened from previously the deepest enclosing block or statement in Edition 2021. This warrants an Edition change. Coming with the Edition change, this patch also implements an edition lint to warn about the change and a safe rewrite suggestion to preserve the 2021 semantics in most cases. Related to #103108. Related crater runs: https://github.com/rust-lang/rust/pull/129466.
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>
.