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Replace NoLandingPad with another alive Visitor 

The broken reference to the non-existing `NoLandingPad` is replaced by `LocalUseCounter` to fix this document.
This commit is contained in:
Mohammad Omidvar 2022-12-13 15:05:39 -08:00 committed by Tshepang Mbambo
parent cfb4531dde
commit 6303e165ff
1 changed files with 3 additions and 5 deletions
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src/mir/visitor.md
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@ -37,12 +37,10 @@ code that will execute whenever a `foo` is found. If you want to
recursively walk the contents of the `foo`, you then invoke the
`super_foo` method. (NB. You never want to override `super_foo`.)
A very simple example of a visitor can be found in [`NoLandingPads`].
That visitor doesn't even require any state: it just visits all
terminators and removes their `unwind` successors.
A very simple example of a visitor can be found in [`LocalUseCounter`].
By implementing `visit_local` method, this visitor counts how many tims each local is used.
<!--- TODO: Change NoLandingPads. [#1232](https://github.com/rust-lang/rustc-dev-guide/issues/1232) -->
[`NoLandingPads`]: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_mir_transform/no_landing_pads/struct.NoLandingPads.html
[`LocalUseCounter`]: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_mir_transform/simplify_try/struct.LocalUseCounter.html
## Traversal