rust-lang / rust-lang/rust

compiletest: `needs-*` directive handling mixes `:` and ` ` name-val/name-comment separator

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A-compiletest C-bug E-hard E-tedious T-bootstrap T-compiler
Dominant language
Rust
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Description

Remark: I didn't want to adjust how directives accept : for name-value form vs name-comment form in this PR, so this temporarily accepts //@ needs-target-has-atomic 8,16,ptr but I want to only accept the colon form in the future.

Originally posted by @jieyouxu in https://github.com/rust-lang/rust/pull/133736#discussion_r1865325663

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Research direction

Start by locating compiletest's parser for needs-* directives, especially needs-target-has-atomic. Check the existing handling of the colon and space separators, then verify that the colon form remains accepted while the space-separated name-value form is no longer accepted.

Written by the indexing model from the issue text.

Assessment

Tech stack
rust
Domain
compilers
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
45/100

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