Fix #13576 FP: syntaxError when enum is initialized from lambda expression (#7253)

Author: chrchr-github

lib/tokenlist.cpp

@@ -1447,7 +1447,7 @@ const Token* findLambdaEndTokenWithoutAST(const Token* tok) {
         tok = tok->link()->next();
     if (Token::simpleMatch(tok, "mutable"))
         tok = tok->next();
-    if (Token::simpleMatch(tok, ".")) { // trailing return type
+    if (Token::Match(tok, ".|->")) { // trailing return type
         tok = tok->next();
         while (Token::Match(tok, "%type%|%name%|::|&|&&|*|<|(")) {
             if (tok->link())

test/testgarbage.cpp

@@ -1764,6 +1764,7 @@ class TestGarbage : public TestFixture {
     }
     void garbageCode228() {
         ASSERT_NO_THROW(checkCode("void f() { enum { A = [=]() mutable { return 0; }() }; }"));
+        ASSERT_NO_THROW(checkCode("enum { A = [=](void) mutable -> int { return 0; }() };"));
     }
 
     void syntaxErrorFirstToken() {