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-rw-r--r--clang/lib/Sema/SemaTemplate.cpp19
1 files changed, 16 insertions, 3 deletions
diff --git a/clang/lib/Sema/SemaTemplate.cpp b/clang/lib/Sema/SemaTemplate.cpp
index 3b85b98abdd..0b4b083ffbd 100644
--- a/clang/lib/Sema/SemaTemplate.cpp
+++ b/clang/lib/Sema/SemaTemplate.cpp
@@ -414,9 +414,22 @@ Sema::ActOnDependentIdExpression(const CXXScopeSpec &SS,
const TemplateArgumentListInfo *TemplateArgs) {
DeclContext *DC = getFunctionLevelDeclContext();
- if (!isAddressOfOperand &&
- isa<CXXMethodDecl>(DC) &&
- cast<CXXMethodDecl>(DC)->isInstance()) {
+ // C++11 [expr.prim.general]p12:
+ // An id-expression that denotes a non-static data member or non-static
+ // member function of a class can only be used:
+ // (...)
+ // - if that id-expression denotes a non-static data member and it
+ // appears in an unevaluated operand.
+ //
+ // If this might be the case, form a DependentScopeDeclRefExpr instead of a
+ // CXXDependentScopeMemberExpr. The former can instantiate to either
+ // DeclRefExpr or MemberExpr depending on lookup results, while the latter is
+ // always a MemberExpr.
+ bool MightBeCxx11UnevalField =
+ getLangOpts().CPlusPlus11 && isUnevaluatedContext();
+
+ if (!MightBeCxx11UnevalField && !isAddressOfOperand &&
+ isa<CXXMethodDecl>(DC) && cast<CXXMethodDecl>(DC)->isInstance()) {
QualType ThisType = cast<CXXMethodDecl>(DC)->getThisType(Context);
// Since the 'this' expression is synthesized, we don't need to
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