Fix #11369 Syntax error. Unexpected tokens in initializer. (#4568)

Author: chrchr-github

lib/tokenlist.cpp

@@ -626,7 +626,8 @@ static bool iscpp11init_impl(const Token * const tok)
     }
     if (!nameToken)
         return false;
-    if (nameToken->str() == ")" && Token::simpleMatch(nameToken->link()->previous(), "decltype ("))
+    if (nameToken->str() == ")" && Token::simpleMatch(nameToken->link()->previous(), "decltype (") &&
+        !Token::simpleMatch(nameToken->link()->tokAt(-2), "."))
         return true;
     if (Token::simpleMatch(nameToken, ", {"))
         return true;

test/testtokenize.cpp

@@ -6377,6 +6377,12 @@ class TestTokenizer : public TestFixture {
         ASSERT_EQUALS("AB: abc+=", testAst("struct A : public B<C*> { void f() { a=b+c; } };"));
 
         ASSERT_EQUALS("xfts(=", testAst("; auto x = f(ts...);"));
+
+        // #11369
+        ASSERT_NO_THROW(tokenizeAndStringify("int a;\n"
+                                             "template <class> auto b() -> decltype(a) {\n"
+                                             "    if (a) {}\n"
+                                             "}\n"));
     }
 
     void astcast() {