When emitting a diagnostic about two-phase name lookup, don't do useless
qualified name lookups into transparent contexts.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@152739 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaOverload.cpp b/lib/Sema/SemaOverload.cpp
index fe999b1..b93fb09 100644
--- a/lib/Sema/SemaOverload.cpp
+++ b/lib/Sema/SemaOverload.cpp
@@ -9244,6 +9244,9 @@
return false;
for (DeclContext *DC = SemaRef.CurContext; DC; DC = DC->getParent()) {
+ if (DC->isTransparentContext())
+ continue;
+
SemaRef.LookupQualifiedName(R, DC);
if (!R.empty()) {
diff --git a/test/SemaCXX/warn-unused-value.cpp b/test/SemaCXX/warn-unused-value.cpp
index 80298ec..1c0263c 100644
--- a/test/SemaCXX/warn-unused-value.cpp
+++ b/test/SemaCXX/warn-unused-value.cpp
@@ -30,3 +30,22 @@
}
#undef NOP
}
+
+namespace test2 {
+ extern "C" {
+ namespace std {
+ template<typename T> struct basic_string {
+ struct X {};
+ void method() const {
+ X* x;
+ &x[0]; // expected-warning {{expression result unused}}
+ }
+ };
+ typedef basic_string<char> string;
+ void func(const std::string& str) {
+ str.method(); // expected-note {{in instantiation of member function}}
+ }
+ }
+ }
+}
+
