Fix #13509 information: --check-library: There is no matching configuration for function T::cbegin() (#8319)

Author: chrchr-github

lib/checkfunctions.cpp

@@ -635,6 +635,12 @@ void CheckFunctions::checkLibraryMatchFunctions()
         if (!tok->scope() || !tok->scope()->isExecutable())
             continue;
 
+        // skip uninstantiated templates
+        if (tok == tok->scope()->bodyStart && tok->scope()->function && tok->scope()->function->templateDef) {
+            tok = tok->link();
+            continue;
+        }
+
         if (tok->str() == "new")
             insideNew = true;
         else if (tok->str() == ";")

test/testfunctions.cpp

@@ -2220,6 +2220,12 @@ class TestFunctions : public TestFixture {
               "    return b;\n"
               "}\n", s);
         TODO_ASSERT_EQUALS("", "[test.cpp:6:5]: (debug) auto token with no type. [autoNoType]\n", errout_str());
+
+        check("template <typename T>\n" // #13509
+              "void f(const T& t) {\n"
+              "    t.g();\n"
+              "}\n", s);
+        ASSERT_EQUALS("", errout_str());
     }
 
     void checkUseStandardLibrary1() {