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| author | Tshepang Mbambo <tshepang@gmail.com> | 2025-05-10 12:35:40 +0200 |
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| committer | Tshepang Mbambo <tshepang@gmail.com> | 2025-05-10 12:35:40 +0200 |
| commit | 2efa4e61153fca183d2098fecf6342e0a81f4559 (patch) | |
| tree | d169b78f05b4aada9ab08361267c4f345cf2b385 | |
| parent | 9f07c1ef93142e7fe8ffd1fdd7b458163f3d5623 (diff) | |
| download | rust-2efa4e61153fca183d2098fecf6342e0a81f4559.tar.gz rust-2efa4e61153fca183d2098fecf6342e0a81f4559.zip | |
sembr
| -rw-r--r-- | src/doc/rustc-dev-guide/src/ty-fold.md | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/src/doc/rustc-dev-guide/src/ty-fold.md b/src/doc/rustc-dev-guide/src/ty-fold.md index f659612e816..d413e5038ce 100644 --- a/src/doc/rustc-dev-guide/src/ty-fold.md +++ b/src/doc/rustc-dev-guide/src/ty-fold.md @@ -1,8 +1,10 @@ # `TypeFoldable` and `TypeFolder` -In [a previous chapter], we discussed instantiating binders. This involves looking at everything inside of a `Early(Binder)` -to find any usages of the bound vars in order to replace them. Binders can wrap an arbitrary Rust type `T`, not just a `Ty`. So, -how do we implement the `instantiate` methods on the `Early/Binder` types. +In [a previous chapter], we discussed instantiating binders. +This involves looking at everything inside of a `Early(Binder)` +to find any usages of the bound vars in order to replace them. +Binders can wrap an arbitrary Rust type `T`, not just a `Ty`. +So, how do we implement the `instantiate` methods on the `Early/Binder` types. The answer is a couple of traits: [`TypeFoldable`](https://doc.rust-lang.org/nightly/nightly-rustc/rustc_middle/ty/fold/trait.TypeFoldable.html) |