Fix false positive with ignoredReturnValue with std::move (#1809)

lib/checkfunctions.cpp

@@ -198,7 +198,7 @@ void CheckFunctions::checkIgnoredReturnValue()
     for (const Scope *scope : symbolDatabase->functionScopes) {
         for (const Token* tok = scope->bodyStart->next(); tok != scope->bodyEnd; tok = tok->next()) {
             // skip c++11 initialization, ({...})
-            if (Token::Match(tok, "%var%|(|, {"))
+            if (Token::Match(tok, "%var%|(|,|return {"))
                 tok = tok->linkAt(1);
             else if (Token::Match(tok, "[(<]") && tok->link())
                 tok = tok->link();

test/testfunctions.cpp

@@ -1175,6 +1175,14 @@ private:
               "  return std::get<0>(c);\n"
               "}\n");
         ASSERT_EQUALS("", errout.str());
+
+        check("struct A { int x; };\n"
+              "template <class... Ts>\n"
+              "A f(int x, Ts... xs) {\n"
+              "    return {std::move(x), static_cast<int>(xs)...};\n"
+              "}\n"
+              "A g() { return f(1); }\n");
+        ASSERT_EQUALS("", errout.str());
     }
 
     void memsetZeroBytes() {