This patch implements Sema for clause 13.3.3.1p4.
It has to do with vararg constructors used as conversion
functions. Code gen needs work. This is WIP.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@86207 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaExprCXX.cpp b/lib/Sema/SemaExprCXX.cpp
index dc57681..3408ff7 100644
--- a/lib/Sema/SemaExprCXX.cpp
+++ b/lib/Sema/SemaExprCXX.cpp
@@ -1086,18 +1086,21 @@
} else if (const CXXConstructorDecl *Ctor =
dyn_cast<CXXConstructorDecl>(FD)) {
CastKind = CastExpr::CK_ConstructorConversion;
-
- // If the user-defined conversion is specified by a constructor, the
- // initial standard conversion sequence converts the source type to the
- // type required by the argument of the constructor
- BeforeToType = Ctor->getParamDecl(0)->getType();
+ // Do no conversion if dealing with ... for the first conversion.
+ if (!ICS.UserDefined.EllipsisConversion)
+ // If the user-defined conversion is specified by a constructor, the
+ // initial standard conversion sequence converts the source type to the
+ // type required by the argument of the constructor
+ BeforeToType = Ctor->getParamDecl(0)->getType();
}
else
assert(0 && "Unknown conversion function kind!");
-
- if (PerformImplicitConversion(From, BeforeToType,
- ICS.UserDefined.Before, "converting"))
- return true;
+ // Whatch out for elipsis conversion.
+ if (!BeforeToType.isNull()) {
+ if (PerformImplicitConversion(From, BeforeToType,
+ ICS.UserDefined.Before, "converting"))
+ return true;
+ }
OwningExprResult CastArg
= BuildCXXCastArgument(From->getLocStart(),