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[ConstraintSystem] Implement simplication of {Pack, PatternBinding}Element elements

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This commit is contained in:
Pavel Yaskevich
2022-03-16 12:32:57 -07:00
parent 029b11234b
commit 8fe78d485e
1 changed files with 14 additions and 0 deletions
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14
lib/Sema/ConstraintSystem.cpp
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@@ -4906,6 +4906,20 @@ void constraints::simplifyLocator(ASTNode &anchor,
case ConstraintLocator::ConformanceRequirement:
case ConstraintLocator::TypeParameterRequirement:
break;
case ConstraintLocator::PackElement:
break;
case ConstraintLocator::PatternBindingElement: {
auto pattern = path[0].castTo<LocatorPathElt::PatternBindingElement>();
auto *patternBinding = cast<PatternBindingDecl>(anchor.get<Decl *>());
anchor = patternBinding->getInit(pattern.getIndex());
// If this pattern is uninitialized, let's use it as anchor.
if (!anchor)
anchor = patternBinding->getPattern(pattern.getIndex());
path = path.slice(1);
continue;
}
}
// If we get here, we couldn't simplify the path further.