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Document borrowck behaviour.

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This commit is contained in:
Camille GILLOT 2023-03-08 14:39:05 +00:00
parent b34a8a294d
commit 45f2a1af3b
1 changed files with 3 additions and 1 deletions
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4
compiler/rustc_borrowck/src/def_use.rs
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@ -72,8 +72,10 @@ pub fn categorize(context: PlaceContext) -> Option<DefUse> {
PlaceContext::MutatingUse(MutatingUseContext::Drop) =>
Some(DefUse::Drop),
// This statement exists to help unsafeck. It does not require the place to be live.
PlaceContext::NonUse(NonUseContext::PlaceMention) => None,
// Debug info is neither def nor use.
PlaceContext::NonUse(NonUseContext::PlaceMention | NonUseContext::VarDebugInfo) => None,
PlaceContext::NonUse(NonUseContext::VarDebugInfo) => None,
PlaceContext::MutatingUse(MutatingUseContext::Deinit | MutatingUseContext::SetDiscriminant) => {
bug!("These statements are not allowed in this MIR phase")