Don't throw internalAstError for parameter pack in template argument list (#4773)

Author: chrchr-github

lib/tokenlist.cpp

@@ -691,7 +691,7 @@ static bool iscpp11init_impl(const Token * const tok)
     if (!Token::simpleMatch(endtok, "} ;"))
         return true;
     const Token *prev = nameToken;
-    while (Token::Match(prev, "%name%|::|:|<|>|(|)|,|%num%|%cop%")) {
+    while (Token::Match(prev, "%name%|::|:|<|>|(|)|,|%num%|%cop%|...")) {
         if (Token::Match(prev, "class|struct|union|enum"))
             return false;
 

test/testtokenize.cpp

@@ -7662,6 +7662,16 @@ class TestTokenizer : public TestFixture {
                         "{ } }",
                         TokenImpl::Cpp11init::NOINIT);
 
+        testIsCpp11init("struct S {};\n"
+                        "template<class... Args>\n"
+                        "struct T;\n"
+                        "template<class... Args>\n"
+                        "struct T<void, Args...> final : S {\n"
+                        "    void operator()(Args...) {}\n"
+                        "};\n",
+                        "{ void",
+                        TokenImpl::Cpp11init::NOINIT);
+
         ASSERT_NO_THROW(tokenizeAndStringify("template<typename U> struct X {};\n" // don't crash
                                              "template<typename T> auto f(T t) -> X<decltype(t + 1)> {}\n"));
         #undef testIsCpp11init