d50a8d5fb3
- Show the `#![ ... ]` in the span (to make it clear that it should not be included in the CLI argument) - Show more detailed errors when the crate has valid token trees but invalid syntax. Previously, `crate-attr=feature(foo),feature(bar)` would just say "invalid crate attribute" and point at the comma. Now, it explicitly says that the comma was unexpected, which is useful when using `--error-format=short`. It also fixes the column to show the correct span. - Recover from parse errors. Previously we would abort immediately on syntax errors; now we go on to try and type-check the rest of the crate. The new diagnostic code also happens to be slightly shorter. |
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| .. | ||
| src | ||
| Cargo.toml | ||
| README.md | ||
The rustc_ast crate contains those things concerned purely with syntax
– that is, the AST ("abstract syntax tree"), along with some definitions for tokens and token streams, data structures/traits for mutating ASTs, and shared definitions for other AST-related parts of the compiler (like the lexer and macro-expansion).
For more information about how these things work in rustc, see the rustc dev guide: