bjoernager/rust
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use ty::Unevaluated<'tcx, ()> in type system

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This commit is contained in:
b-naber 2022-06-27 16:32:47 +02:00
parent 7098c181f8
commit a4bbb8db5c
32 changed files with 304 additions and 192 deletions
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26
compiler/rustc_mir_build/src/thir/pattern/mod.rs
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@ -565,23 +565,19 @@ impl<'a, 'tcx> PatCtxt<'a, 'tcx> {
let value = value.eval(self.tcx, self.param_env);
match value {
mir::ConstantKind::Ty(c) => {
match c.kind() {
ConstKind::Param(_) => {
self.errors.push(PatternError::ConstParamInPattern(span));
return PatKind::Wild;
}
ConstKind::Unevaluated(_) => {
// If we land here it means the const can't be evaluated because it's `TooGeneric`.
self.tcx
.sess
.span_err(span, "constant pattern depends on a generic parameter");
return PatKind::Wild;
}
_ => bug!("Expected either ConstKind::Param or ConstKind::Unevaluated"),
mir::ConstantKind::Ty(c) => match c.kind() {
ConstKind::Param(_) => {
self.errors.push(PatternError::ConstParamInPattern(span));
return PatKind::Wild;
}
}
_ => bug!("Expected ConstKind::Param"),
},
mir::ConstantKind::Val(_, _) => self.const_to_pat(value, id, span, false).kind,
mir::ConstantKind::Unevaluated(..) => {
// If we land here it means the const can't be evaluated because it's `TooGeneric`.
self.tcx.sess.span_err(span, "constant pattern depends on a generic parameter");
return PatKind::Wild;
}
}
}