Distinguish stream operators from binary shifts

Author: mbaluda

cpp/common/src/codingstandards/cpp/Operator.qll

@@ -170,8 +170,8 @@ class UserBitwiseOperator extends Function {
       op in ["&", "|", "^", "~", "%", "<<", ">>"]
     ) and
     not this.isCompilerGenerated() and
-    not this.getType().hasName("ostream") and
-    not this.getType().hasName("istream")
+    not this.getType().(ReferenceType).getBaseType().hasName("ostream") and
+    not this.getType().(ReferenceType).getBaseType().hasName("istream")
   }
 }
 

cpp/common/test/includes/standard-library/ostream.h

@@ -1,6 +1,7 @@
 #ifndef _GHLIBCPP_OSTREAM
 #define _GHLIBCPP_OSTREAM
 #include "string.h"
+#include <ios>
 
 namespace std {
 template <class charT, class traits>