C++: Fix resolving of templated partial specialization

Use-case:
template<class T> struct t {};

template<class> struct s { float f; };
template<class X> struct s<t<X>> { int i; };

void f()
{
    s<t<char>> var;
    var.i; // i not highlighted
}

Task-number: QTCREATORBUG-14034
Change-Id: I5d00bc3247352fca4af4c41a47c208ec3e193c8e
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@theqtcompany.com>

1 files changed, 15 insertions, 0 deletions

diff --git a/src/plugins/cpptools/cppcompletion_test.cpp b/src/plugins/cpptools/cppcompletion_test.cpp
index 82a58d4760..d8bd4101e2 100644
--- a/src/plugins/cpptools/cppcompletion_test.cpp
+++ b/src/plugins/cpptools/cppcompletion_test.cpp
@@ -2637,6 +2637,21 @@ void CppToolsPlugin::test_completion_data()
         << QLatin1String("i")
         << QLatin1String("s"));
 
+    QTest::newRow("partial_specialization_templated_argument") << _(
+            "template<class T> struct t {};\n"
+            "\n"
+            "template<class> struct s { float f; };\n"
+            "template<class X> struct s<t<X>> { int i; };\n"
+            "\n"
+            "void f()\n"
+            "{\n"
+            "    s<t<char>> var;\n"
+            "    @\n"
+            "}\n"
+    ) << _("var.") << (QStringList()
+        << QLatin1String("i")
+        << QLatin1String("s"));
+
     QTest::newRow("auto_declaration_in_if_condition") << _(
             "struct Foo { int bar; };\n"
             "void fun() {\n"