averello/swift-mirror
1
0
Fork 0
mirror of https://github.com/apple/swift.git synced 2025-12-21 12:14:44 +01:00
Code Issues Packages Projects Releases Wiki Activity

Merge pull request #26459 from xedin/diag-conversion-to-specified-type

Browse Source 
[ConstraintSystem] Add a fix to ignore contextual type mismatch
This commit is contained in:
Pavel Yaskevich
2019-08-14 12:58:09 -07:00
committed by GitHub
parent c3b98ef63e 129092eea4
commit 746cad564f
29 changed files with 845 additions and 701 deletions
Download Patch File Download Diff File Expand all files Collapse all files

37
lib/Sema/ConstraintSystem.cpp
View File

@@ -2739,6 +2739,43 @@ bool constraints::isAutoClosureArgument(Expr *argExpr) {
return false;
}
bool constraints::conformsToKnownProtocol(ConstraintSystem &cs, Type type,
KnownProtocolKind protocol) {
if (auto *proto = cs.TC.getProtocol(SourceLoc(), protocol))
return bool(TypeChecker::conformsToProtocol(
type, proto, cs.DC, ConformanceCheckFlags::InExpression));
return false;
}
/// Check whether given type conforms to `RawPepresentable` protocol
/// and return the witness type.
Type constraints::isRawRepresentable(ConstraintSystem &cs, Type type) {
auto &TC = cs.TC;
auto *DC = cs.DC;
auto rawReprType =
TC.getProtocol(SourceLoc(), KnownProtocolKind::RawRepresentable);
if (!rawReprType)
return Type();
auto conformance = TypeChecker::conformsToProtocol(
type, rawReprType, DC, ConformanceCheckFlags::InExpression);
if (!conformance)
return Type();
return conformance->getTypeWitnessByName(type, TC.Context.Id_RawValue);
}
Type constraints::isRawRepresentable(
ConstraintSystem &cs, Type type,
KnownProtocolKind rawRepresentableProtocol) {
Type rawTy = isRawRepresentable(cs, type);
if (!rawTy || !conformsToKnownProtocol(cs, rawTy, rawRepresentableProtocol))
return Type();
return rawTy;
}
void ConstraintSystem::generateConstraints(
SmallVectorImpl<Constraint *> &constraints, Type type,
ArrayRef<OverloadChoice> choices, DeclContext *useDC,