Add first cpp_type infrastructure

src/cpp_entity_type.cpp

@@ -23,3 +23,19 @@ bool cppast::is_scope(cpp_entity_type type) noexcept
 
     return false;
 }
+
+bool cppast::is_type(cpp_entity_type type) noexcept
+{
+    switch (type)
+    {
+    case cpp_entity_type::file_t:
+    case cpp_entity_type::namespace_t:
+    case cpp_entity_type::namespace_alias_t:
+    case cpp_entity_type::using_directive_t:
+    case cpp_entity_type::using_declaration_t:
+    case cpp_entity_type::count:
+        break;
+    }
+
+    return false;
+}

src/cpp_type.cpp

@@ -0,0 +1,15 @@
+// Copyright (C) 2017 Jonathan Müller <jonathanmueller.dev@gmail.com>
+// This file is subject to the license terms in the LICENSE file
+// found in the top-level directory of this distribution.
+
+#include <cppast/cpp_type.hpp>
+
+#include <cppast/cpp_entity.hpp>
+#include <cppast/cpp_entity_type.hpp>
+
+using namespace cppast;
+
+bool detail::cpp_type_ref_predicate::operator()(const cpp_entity& e)
+{
+    return is_type(e.type());
+}