C++: Fix matching NamedType

NamedType::isEqualTo() wasn't properly moved to Matcher.

In the test case, the function argument matching was failing.

Change-Id: Ia3cb82c11b039ddea61a41d9574f56d43da16ed0
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>

src/libs/3rdparty/cplusplus/Matcher.cpp

@@ -159,7 +159,15 @@ bool Matcher::match(const NamedType *type, const NamedType *otherType)
     if (type == otherType)
         return true;
 
-    else if (! Matcher::match(type->name(), otherType->name(), this))
+    const Name *name = type->name();
+    if (const QualifiedNameId *q = name->asQualifiedNameId())
+        name = q->name();
+
+    const Name *otherName = otherType->name();
+    if (const QualifiedNameId *q = otherName->asQualifiedNameId())
+        otherName = q->name();
+
+    if (! Matcher::match(name, otherName, this))
         return false;
 
     return true;

src/plugins/cppeditor/followsymbol_switchmethoddecldef_test.cpp

@@ -962,6 +962,16 @@ void CppEditorPlugin::test_FollowSymbolUnderCursor_multipleDocuments_data()
                                 "void Foo::$foo(int) {}\n",
                                 "foo.cpp")
     );
+
+    QTest::newRow("matchFunctionSignature2") << (QList<TestDocumentPtr>()
+        << TestDocument::create("namespace N { class C; }\n"
+                                "bool *@fun(N::C *) const;\n",
+                                "foo.h")
+        << TestDocument::create("#include \"foo.h\"\n"
+                                "using namespace N;\n"
+                                "bool *$fun(C *) const {}\n",
+                                "foo.cpp")
+    );
 }
 
 void CppEditorPlugin::test_FollowSymbolUnderCursor_multipleDocuments()