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add a bit about def path (#548)

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Who? Me?! 2019-12-31 06:46:18 -06:00 committed by Santiago Pastorino
parent 423808fb45
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@ -102,6 +102,12 @@ sorts of identifiers in active use:
[`BodyId`]: https://doc.rust-lang.org/nightly/nightly-rustc/rustc/hir/struct.BodyId.html [`BodyId`]: https://doc.rust-lang.org/nightly/nightly-rustc/rustc/hir/struct.BodyId.html
[`NodeId`]: https://doc.rust-lang.org/nightly/nightly-rustc/syntax/ast/struct.NodeId.html [`NodeId`]: https://doc.rust-lang.org/nightly/nightly-rustc/syntax/ast/struct.NodeId.html
We also have an internal map to go from `DefId` to what’s called "Def path". "Def path" is like a
module path but a bit more rich. For example, it may be `crate::foo::MyStruct` that identifies
this definition uniquely. It’s a bit different than a module path because it might include a type
parameter `T`, which you can't write in normal rust, like `crate::foo::MyStruct::T`. These are used
in incremental compilation.
### The HIR Map ### The HIR Map
Most of the time when you are working with the HIR, you will do so via Most of the time when you are working with the HIR, you will do so via