`A13-2-2`: bitwise/arithmetic operator alert reported for an insertion operator (operator<<)

[mbaluda]

Affected rules

• A13-2-2

Description

A false positive alert is reported for the following code example which is not trying to implement a bitwise or arithmetic operator:

User-defined bitwise or arithmetic operator test::operator<<(ostream &, const Test &) -> ostream & does not return a prvalue.

Example

#include <ostream>
namespace test {
struct Test {};

std::ostream& operator<<(std::ostream& os, const Test&) {  // A13-2-2 reported here
  os << "test";
  return os;
}

}  // namespace test