Fix #13226 FP constParameterReference with array member (regression) (danmar#6921)

Author: chrchr-github

lib/astutils.cpp

@@ -2601,7 +2601,7 @@ bool isVariableChanged(const Token *tok, int indirect, const Settings &settings,
     const Token *tok2 = tok;
     int derefs = 0;
     while ((tok2->astParent() && tok2->astParent()->isUnaryOp("*")) ||
-           (Token::simpleMatch(tok2->astParent(), ".") && !Token::simpleMatch(tok2->astParent()->astParent(), "(")) ||
+           (Token::simpleMatch(tok2->astParent(), ".") && !Token::Match(tok2->astParent()->astParent(), "[(,]")) ||
            (tok2->astParent() && tok2->astParent()->isUnaryOp("&") && Token::simpleMatch(tok2->astParent()->astParent(), ".") && tok2->astParent()->astParent()->originalName()=="->") ||
            (Token::simpleMatch(tok2->astParent(), "[") && tok2 == tok2->astParent()->astOperand1())) {
         if (tok2->astParent() && (tok2->astParent()->isUnaryOp("*") || (astIsLHS(tok2) && tok2->astParent()->originalName() == "->")))

test/testother.cpp

@@ -3743,6 +3743,13 @@ class TestOther : public TestFixture {
               "    return lam();\n"
               "}\n");
         ASSERT_EQUALS("", errout_str());
+
+        check("struct S { int x[3]; };\n" // #13226
+              "void g(int a, int* b);\n"
+              "void f(int a, S& s) {\n"
+              "    return g(a, s.x);\n"
+              "}\n");
+        ASSERT_EQUALS("", errout_str());
     }
 
     void constParameterCallback() {