a7922dbb3f
Add extensive set of drop order tests On lang, we've recently been discussing the drop order with respect to `let` chains apropos of how we shortened temporary lifetimes in Rust 2024 and how we may shorten them further in the future. Here we add an extensive set of tests that demonstrate the drop order in the cases that interest us. Regarding the let chains stabilization prompting this analysis, see: - https://github.com/rust-lang/rust/pull/132833 r? ghost cc `@ehuss` `@dingxiangfei2009` `@nikomatsakis`
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>.