Fix #12185 FN constVariablePointer with stream (#5659)

Author: chrchr-github

lib/checkother.cpp

@@ -1580,7 +1580,7 @@ void CheckOther::checkConstPointer()
             }
         } else {
             int argn = -1;
-            if (Token::Match(parent, "%oror%|%comp%|&&|?|!|-"))
+            if (Token::Match(parent, "%oror%|%comp%|&&|?|!|-|<<"))
                 continue;
             if (Token::simpleMatch(parent, "(") && Token::Match(parent->astOperand1(), "if|while"))
                 continue;

test/cfg/opencv2.cpp

@@ -39,7 +39,7 @@ void ignoredReturnValue()
 
 void memleak()
 {
-    char * pBuf = (char *)cv::fastMalloc(1000); // cppcheck-suppress cstyleCast
+    const char * pBuf = (char *)cv::fastMalloc(1000); // cppcheck-suppress cstyleCast
     std::cout << pBuf;
     // cppcheck-suppress memleak
 }

test/testother.cpp

@@ -3882,6 +3882,13 @@ class TestOther : public TestFixture {
         ASSERT_EQUALS("[test.cpp:1]: (style) Parameter 'r' can be declared as pointer to const\n"
                       "[test.cpp:1]: (style) Parameter 'b' can be declared as pointer to const\n",
                       errout.str());
+
+        check("void f(int i) {\n" // #12185
+              "    void* p = &i;\n"
+              "    std::cout << p << '\\n';\n"
+              "}\n");
+        ASSERT_EQUALS("[test.cpp:2]: (style) Variable 'p' can be declared as pointer to const\n",
+                      errout.str());
     }
 
     void switchRedundantAssignmentTest() {
@@ -8436,7 +8443,7 @@ class TestOther : public TestFixture {
               "  ptr = otherPtr;\n"
               "  free(otherPtr - xx - 1);\n"
               "}");
-        ASSERT_EQUALS("", errout.str());
+        ASSERT_EQUALS("[test.cpp:2]: (style) Variable 'ptr' can be declared as pointer to const\n", errout.str());
     }
 
     void checkRedundantCopy() {