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Remove `Path::is_ident`. It checks that a path has a single segment that matches the given symbol, and that there are zero generic arguments. It has a single use. We also have `impl PartialEq<Symbol> for Path` which does exactly the same thing *except* it doesn't check for zero generic arguments, which seems like an oversight. It has numerous uses. This commit removes `Path::is_ident`, adds a test for zero generic arguments to `PartialEq<Symbol> for Path`, and changes the single use of `is_ident` to instead use `==`. r? `@wesleywiser`
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: