5d55009b79
Improve HIR stats #100398 improve the AST stats collection done by `-Zhir-stats`. This PR does the same for HIR stats collection. r? `@davidtwco`
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: