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Issue #74616 tracks a backwards-compatibility hack for certain macros. This has is implemented by hard-coding the filenames and macro names of certain code that we want to continue to compile. However, the initial implementation of the hack was based on the directory structure when building the crate from its repository (e.g. `js-sys/src/lib.rs`). When the crate is build as a dependency, it will include a version number from the clone from the cargo registry (e.g. `js-sys-0.3.17/src/lib.rs`), which would fail the check. This commit modifies the backwards-compatibility hack to check that desired crate name (`js-sys` or `time-macros-impl`) is a prefix of the proper part of the path. See https://github.com/rust-lang/rust/issues/76070#issuecomment-687215646 for more details. |
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Cargo.toml | ||
README.md |
The rustc_ast
crate contains those things concerned purely with syntax
– that is, the AST ("abstract syntax tree"), parser, pretty-printer,
lexer, macro expander, and utilities for traversing ASTs.
For more information about how these things work in rustc, see the rustc dev guide: