rustc-ap-rustc_ast_passes 667.0.0

Automatically published version of the package `rustc_ast_passes` in the rust-lang/rust repository from commit a1528c432e45339d9b5602a19ac3571e2900d37b The publishing script for this crate lives at: https://github.com/alexcrichton/rustc-auto-publish
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The rustc_ast_passes crate contains passes which validate the AST in syntax parsed by rustc_parse and then lowered, after the passes in this crate, by rustc_ast_lowering.

The crate also contains other misc AST visitors, e.g. node_count and show_span.