Module ir 

Structural-mode Rust frontend: real-parser CST to Syntax-IR conversion.

The file is parsed with ra_ap_syntax (rust-analyzer’s error-tolerant parser) and the resulting lossless CST is mapped onto the language-neutral SyntaxIrFile: a comment- and whitespace-free token stream plus a tree of IrNodes built from structurally meaningful grammar nodes only. Interior expression detail (paths, literals, parentheses, non-assignment binary operators, field accesses) stays token-only under the nearest ancestor node, keeping the tree at the granularity structural comparison works on. Statement wrappers add no node of their own when their inner expression already maps to a shape: f(); is one Shape::Call node, not an ExprStmt(Call) pair.

Nothing is executed or expanded: macro definitions and invocations are recorded as nodes over their raw token trees. Malformed regions and CST-depth truncation become Shape::Error nodes plus byte ranges in SyntaxIrFile::error_ranges. Delimiter nesting is checked with the nonrecursive lexer before the Rust parser constructs its CST, so excessive nesting also becomes explicit truncation data.

Structs

RustStructuralFrontend

The Rust Structural-mode frontend.

Constants

STRUCTURAL_FRONTEND_VERSION

Version tag of this structural frontend, used as a fingerprint input. Bump it whenever a change alters the token stream or the IR tree for unchanged input.