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[Constraint system] Maintain paren type sugar for patterns.

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This commit is contained in:
Doug Gregor
2020-02-23 05:52:39 -10:00
parent 7bef5405ec
commit 244a8232dd
1 changed files with 6 additions and 3 deletions
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9
lib/Sema/CSGen.cpp
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@@ -2207,9 +2207,12 @@ namespace {
switch (pattern->getKind()) {
case PatternKind::Paren:
// Parentheses don't affect the type.
return getTypeForPattern(cast<ParenPattern>(pattern)->getSubPattern(),
locator);
// Parentheses don't affect the canonical type, but record them as
// type sugar.
return ParenType::get(
CS.getASTContext(),
getTypeForPattern(
cast<ParenPattern>(pattern)->getSubPattern(), locator));
case PatternKind::Var:
// Var doesn't affect the type.
return getTypeForPattern(cast<VarPattern>(pattern)->getSubPattern(),