6b0c8cfedc
Improve missing_abi lint This is for the migration lint for https://github.com/rust-lang/rfcs/pull/3722 It is not yet marked as an edition migration lint, because `Edition2027` doesn't exist yet. The lint now includes a machine applicable suggestion: ``` warning: extern declarations without an explicit ABI are deprecated --> src/main.rs:3:1 | 3 | extern fn a() {} | ^^^^^^ help: explicitly specify the C ABI: `extern "C"` | ```
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>.