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Document with_opaque_type_inference's use cases.

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This commit is contained in:
Oli Scherer 2021-08-06 10:49:35 +00:00
parent 1b9ad13941
commit 238d974fc6
1 changed files with 4 additions and 0 deletions
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4
compiler/rustc_infer/src/infer/mod.rs
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@ -581,6 +581,10 @@ impl<'tcx> InferCtxtBuilder<'tcx> {
/// Whenever the `InferCtxt` should be able to handle defining uses of opaque types,
/// you need to call this function. Otherwise the opaque type will be treated opaquely.
///
/// It is only meant to be called in two places, for typeck
/// (via `with_fresh_in_progress_typeck_results`) and for the inference context used
/// in mir borrowck.
pub fn with_opaque_type_inference(mut self, defining_use_anchor: LocalDefId) -> Self {
self.defining_use_anchor = defining_use_anchor;
self