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Improve docs for InstanceDef::ReifyShim.

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This commit is contained in:
Adam Perry 2019-10-10 07:25:54 -07:00
parent ea3ecf22ae
commit 1cdd5d099d
1 changed files with 4 additions and 1 deletions
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5
src/librustc/ty/instance.rs
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@ -28,7 +28,10 @@ pub enum InstanceDef<'tcx> {
/// `fn()` pointer where the function itself cannot be turned into a pointer.
///
/// One example in the compiler today is functions annotated with `#[track_caller]`.
/// One example in the compiler today is functions annotated with `#[track_caller]`, which
/// must have their implicit caller location argument populated for a call. Because this is a
/// required part of the function's ABI but can't be tracked as a property of the function
/// pointer, we create a single "caller location" at the site where the function is reified.
ReifyShim(DefId),
/// `<fn() as FnTrait>::call_*`