mirror of
https://github.com/rust-lang/rust.git
synced 2025-10-05 11:47:13 +00:00
9639a7c522
Introduce `-Zmacro-stats` Introduce `-Zmacro-stats`. It collects data about macro expansions and prints them in a table after expansion finishes. It's very useful for detecting macro bloat, especially for proc macros. r? `@petrochenkov`
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: