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add some docs to hooks/mod.rs #116297

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Oct 6, 2023
Merged

add some docs to hooks/mod.rs #116297

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5 changes: 5 additions & 0 deletions compiler/rustc_middle/src/hooks/mod.rs
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Original file line number Diff line number Diff line change
@@ -1,3 +1,8 @@
//! "Hooks" provide a way for `tcx` functionality to be provided by some downstream crate without
//! everything in rustc having to depend on that crate. This is somewhat similar to queries, but
//! queries come with a lot of machinery for caching and incremental compilation, whereas hooks are
//! just plain function pointers without any of the query magic.

use crate::mir;
use crate::query::TyCtxtAt;
use crate::ty::{Ty, TyCtxt};
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