When marking declarations referenced within an expression (e.g.,
within a default argument), recurse into default arguments. Fixes
PR8401, a regression I introduced in r113700 while refactoring our
handling of "used" declarations in default arguments.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@116817 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaExpr.cpp b/lib/Sema/SemaExpr.cpp
index 031337d..f98aefc 100644
--- a/lib/Sema/SemaExpr.cpp
+++ b/lib/Sema/SemaExpr.cpp
@@ -8019,6 +8019,10 @@
void VisitBlockDeclRefExpr(BlockDeclRefExpr *E) {
S.MarkDeclarationReferenced(E->getLocation(), E->getDecl());
}
+
+ void VisitCXXDefaultArgExpr(CXXDefaultArgExpr *E) {
+ Visit(E->getExpr());
+ }
};
}
diff --git a/test/SemaTemplate/default-expr-arguments.cpp b/test/SemaTemplate/default-expr-arguments.cpp
index eff59a8..8d54926 100644
--- a/test/SemaTemplate/default-expr-arguments.cpp
+++ b/test/SemaTemplate/default-expr-arguments.cpp
@@ -274,3 +274,21 @@
x->g();
}
}
+
+namespace PR8401 {
+ template<typename T>
+ struct A {
+ A() { T* x = 1; } // expected-error{{cannot initialize a variable of type 'int *' with an rvalue of type 'int'}}
+ };
+
+ template<typename T>
+ struct B {
+ B(const A<T>& a = A<T>()); // expected-note{{in instantiation of}}
+ };
+
+ void f(B<int> b = B<int>());
+
+ void g() {
+ f();
+ }
+}