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?
operator>>
also is implemented as non-member functions.
istream& operator>> (istream& is, char& c)
As stated here, operator>>
is also implemented as non-member-function of cin.
Non-member function :
istream& operator>>( istream& st, char& ch );
There is always the standard stated it explicitly in the section § 27.7.2.2.3 :
27.7.2.2.3 basic_istream::operator>> [istream::extractors]
11/ Returns: in.
template<class charT, class traits> basic_istream<charT,traits>& operator>>
(basic_istream<charT,traits>& in, charT& c);
template<class traits> basic_istream<char,traits>& operator>>
(basic_istream<char,traits>& in, unsigned char& c);
template<class traits> basic_istream<char,traits>& operator>>
(basic_istream<char,traits>& in, signed char& c);