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d9fef774e3
They're identical to the same-named types from `ast`. I find it silly (and inefficient) to have all this boilerplate code to convert one type to an identical type. There is already a small amount of type sharing between the AST and HIR, e.g. `Attribute`, `MacroDef`. The commit adds a `pub use` to `rustc_hir` so that, for example, `ast::BinOp` can also be referred to as `hir::BinOp`. This is so the many existing `hir`-qualified mentions of these types don't need to change. The commit also moves a couple of operations from the (removed) HIR types to the AST types, e.g. `is_by_value`. |
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| Cargo.toml | ||
| README.md | ||
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: