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Rollup of 10 pull requests Successful merges: - rust-lang/rust#142458 (Merge unboxed trait object error suggestion into regular dyn incompat error) - rust-lang/rust#142593 (Add a warning to LateContext::get_def_path) - rust-lang/rust#142594 (Add DesugaringKind::FormatLiteral) - rust-lang/rust#142740 (Clean-up `FnCtxt::is_destruct_assignment_desugaring`) - rust-lang/rust#142780 (Port `#[must_use]` to new attribute parsing infrastructure) - rust-lang/rust#142798 (Don't fail to parse a struct if a semicolon is used to separate fields) - rust-lang/rust#142856 (Add a few inline directives in rustc_serialize.) - rust-lang/rust#142868 (remove few allow(dead_code)) - rust-lang/rust#142874 (cranelift: fix target feature name typo: "fxsr") - rust-lang/rust#142877 (Document why tidy checks if `eslint` is installed via `npm`) r? `@ghost` `@rustbot` modify labels: rollup
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: