How does istream::operator>>( const char& ) as no such function is implemented?

Question

Looking at istream documentation, you will see that there is no implementation of function istream &operator>>( char& ), but if you compile and run the code below, it will work just as expected.

#include<iostream>

int main( ) {

  char c;

  std::cin >> c;

  std::cout << c << std::endl;

  return( 0 );

}

Given cin is an object for class istream, which specialization of operator>> is called when std::cin >> c; is executed?

Answer 1

operator>> also is implemented as non-member functions.

istream& operator>> (istream& is, char& c)