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Update ProjectionElem::Downcast documentation #96684

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Merged
merged 1 commit into from
May 4, 2022
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Update ProjectionElem::Downcast documentation #96684

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4 changes: 1 addition & 3 deletions compiler/rustc_middle/src/mir/mod.rs
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Expand Up @@ -2017,9 +2017,7 @@ pub enum ProjectionElem<V, T> {
from_end: bool,
},

/// "Downcast" to a variant of an ADT. Currently, we only introduce
/// this for ADTs with more than one variant. It may be better to
/// just introduce it always, or always for enums.
/// "Downcast" to a variant of an enum or a generator.
///
/// The included Symbol is the name of the variant, used for printing MIR.
Downcast(Option<Symbol>, VariantIdx),
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2 changes: 1 addition & 1 deletion compiler/rustc_middle/src/mir/tcx.rs
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Expand Up @@ -12,7 +12,7 @@ use rustc_target::abi::VariantIdx;
#[derive(Copy, Clone, Debug, TypeFoldable)]
pub struct PlaceTy<'tcx> {
pub ty: Ty<'tcx>,
/// Downcast to a particular variant of an enum, if included.
/// Downcast to a particular variant of an enum or a generator, if included.
pub variant_index: Option<VariantIdx>,
}

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