Finds members of type const string&.

const string reference members are generally considered unsafe as they can be created from a temporary quite easily.

struct S {
  S(const string &Str) : Str(Str) {}
  const string &Str;
S instance("string");

In the constructor call a string temporary is created from const char * and destroyed immediately after the call. This leaves around a dangling reference.

This check emit warnings for both std::string and ::string const reference members.

Corresponding check name: runtime/member_string_reference.