Workaround converison operator parsing bug

src/libclang/type_parser.cpp

@@ -393,9 +393,11 @@ namespace
     {
         // look if the type has a declaration that is a template
         auto decl  = clang_getTypeDeclaration(type);
-        if (is_direct_templated(decl))
+        auto count = clang_Type_getNumTemplateArguments(clang_getCursorType(decl));
+        if (count > 0 || is_direct_templated(decl))
             return decl;
-
+        else
+        {
             // look if the templ_name matches a template template parameter
             auto param = clang_getNullCursor();
             detail::visit_children(cur, [&](const CXCursor& child) {
@@ -409,15 +411,19 @@ namespace
             });
             return param;
         }
+    }
 
     std::unique_ptr<cpp_type> try_parse_instantiation_type(const detail::parse_context&,
                                                            const CXCursor& cur, const CXType& type)
     {
         return make_leave_type(type, [&](std::string&& spelling) -> std::unique_ptr<cpp_type> {
             auto ptr = spelling.c_str();
+
             std::string templ_name;
             for (; *ptr && *ptr != '<'; ++ptr)
                 templ_name += *ptr;
+            if (*ptr != '<')
+                return nullptr;
             ++ptr;
 
             auto templ = get_instantiation_template(cur, type, templ_name);
@@ -429,7 +435,8 @@ namespace
 
             // parse arguments
             // i.e. not parse really, just add the string
-            DEBUG_ASSERT(!spelling.empty() && spelling.back() == '>', detail::assert_handler{});
+            if (spelling.empty() || spelling.back() != '>')
+                return nullptr;
             spelling.pop_back();
             builder.add_unexposed_arguments(ptr);
 

test/cpp_member_function.cpp

@@ -157,18 +157,36 @@ TEST_CASE("cpp_conversion_op")
 namespace ns
 {
     template <typename T>
-    using type = char;
+    struct type {};
 }
 
 // most of it only need to be check in member function
 struct foo
 {
     /// operator int&();
-    operator int&();
+    operator int&()
+    {
+        static int i;
+        return i;
+    }
+
     /// explicit operator bool()const;
-    explicit operator bool() const;
+    explicit operator bool() const
+    {
+        return false;
+    }
+
     /// constexpr operator ns::type<int>();
-    constexpr operator ns::type<int>();
+    constexpr operator ns::type<int>()
+    {
+        return {};
+    }
+
+    /// constexpr operator ns::type<char>();
+    constexpr operator ns::type<char>()
+    {
+        return {};
+    }
 };
 )";
 
@@ -177,7 +195,7 @@ struct foo
     auto count            = test_visit<cpp_conversion_op>(*file, [&](const cpp_conversion_op& op) {
         REQUIRE(count_children(op.parameters()) == 0u);
         REQUIRE(!op.is_variadic());
-        REQUIRE(op.body_kind() == cpp_function_declaration);
+        REQUIRE(op.body_kind() == cpp_function_definition);
         REQUIRE(op.ref_qualifier() == cpp_ref_none);
         REQUIRE(!op.virtual_info());
         REQUIRE(!op.noexcept_condition());
@@ -198,17 +216,32 @@ struct foo
         }
         else if (!op.is_explicit() && op.is_constexpr())
         {
-            REQUIRE(op.name() == "operator ns::type<int>");
-            cpp_template_instantiation_type::builder builder(
-                cpp_template_ref(cpp_entity_id(""), "ns::type"));
-            builder.add_unexposed_arguments("int");
-            REQUIRE(equal_types(idx, op.return_type(), *builder.finish()));
             REQUIRE(op.cv_qualifier() == cpp_cv_none);
+            if (op.name() == "operator ns::type<int>")
+            {
+                REQUIRE(op.return_type().kind() == cpp_type_kind::template_instantiation_t);
+                auto& inst = static_cast<const cpp_template_instantiation_type&>(op.return_type());
+
+                REQUIRE(inst.primary_template().name() == "ns::type");
+                REQUIRE(!inst.arguments_exposed());
+                REQUIRE(inst.unexposed_arguments() == "int");
+            }
+            else if (op.name() == "operator ns::type<char>")
+            {
+                REQUIRE(op.return_type().kind() == cpp_type_kind::template_instantiation_t);
+                auto& inst = static_cast<const cpp_template_instantiation_type&>(op.return_type());
+
+                REQUIRE(inst.primary_template().name() == "ns::type");
+                REQUIRE(!inst.arguments_exposed());
+                REQUIRE(inst.unexposed_arguments() == "char");
+            }
+            else
+                REQUIRE(false);
         }
         else
             REQUIRE(false);
     });
-    REQUIRE(count == 3u);
+    REQUIRE(count == 4u);
 }
 
 TEST_CASE("cpp_constructor")