bjoernager/rust
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Introduce opaque type to hidden type projection

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This commit is contained in:
Oli Scherer 2022-06-22 15:28:28 +00:00
parent 116819f54f
commit 84a444a1f4
23 changed files with 97 additions and 6 deletions
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8
compiler/rustc_middle/src/mir/mod.rs
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@ -1397,6 +1397,7 @@ impl<V, T> ProjectionElem<V, T> {
Self::Field(_, _)
| Self::Index(_)
| Self::OpaqueCast(_)
| Self::ConstantIndex { .. }
| Self::Subslice { .. }
| Self::Downcast(_, _) => false,
@ -1574,7 +1575,9 @@ impl Debug for Place<'_> {
fn fmt(&self, fmt: &mut Formatter<'_>) -> fmt::Result {
for elem in self.projection.iter().rev() {
match elem {
ProjectionElem::Downcast(_, _) | ProjectionElem::Field(_, _) => {
ProjectionElem::OpaqueCast(_)
| ProjectionElem::Downcast(_, _)
| ProjectionElem::Field(_, _) => {
write!(fmt, "(").unwrap();
}
ProjectionElem::Deref => {
@ -1590,6 +1593,9 @@ impl Debug for Place<'_> {
for elem in self.projection.iter() {
match elem {
ProjectionElem::OpaqueCast(ty) => {
write!(fmt, " as {})", ty)?;
}
ProjectionElem::Downcast(Some(name), _index) => {
write!(fmt, " as {})", name)?;
}