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est31 dfa5e46fd5 The renumber pass is long gone 
Originally, there has been a dedicated pass for renumbering
AST NodeIds to have actual values. This pass had been added by
commit a5ad4c3794.

Then, later, this step was moved to where it resides now,
macro expansion. See commit c86c8d41a2
or PR #36438.

The comment snippet, added by the original commit, has
survived the times without any change, becoming outdated
at removal of the dedicated pass.

Nowadays, grepping for the next_node_id function will show up
multiple places in the compiler that call it, but the main
rewriting that the comment talks about is still done in the
expansion step, inside an innocious looking visit_id function
that's called during macro invocation collection.
2020-11-06 03:18:01 +01:00
..
src The renumber pass is long gone 2020-11-06 03:18:01 +01:00
Cargo.toml
README.md

README.md

The rustc_ast crate contains those things concerned purely with syntax – that is, the AST ("abstract syntax tree"), parser, pretty-printer, lexer, macro expander, and utilities for traversing ASTs.

For more information about how these things work in rustc, see the rustc dev guide: