[ostream.inserters.character]

template<class charT, class traits>
  basic_ostream<charT, traits>& operator<<(basic_ostream<charT, traits>& out, charT c);
template<class charT, class traits>
  basic_ostream<charT, traits>& operator<<(basic_ostream<charT, traits>& out, char c);
// specialization
template<class traits>
  basic_ostream<char, traits>& operator<<(basic_ostream<char, traits>& out, char c);
// signed and unsigned
template<class traits>
  basic_ostream<char, traits>& operator<<(basic_ostream<char, traits>& out, signed char c);
template<class traits>
  basic_ostream<char, traits>& operator<<(basic_ostream<char, traits>& out, unsigned char c);

Effects: Behaves as a formatted output function ([ostream.formatted.reqmts]) of out.

Constructs a character sequence seq.

If c has type char and the character type of the stream is not char, then seq consists of out.widen(c); otherwise seq consists of c.

Determines padding for seq as described in [ostream.formatted.reqmts].

Inserts seq into out.

Calls os.width(0).

template<class charT, class traits>
  basic_ostream<charT, traits>& operator<<(basic_ostream<charT, traits>& out, const charT* s);
template<class charT, class traits>
  basic_ostream<charT, traits>& operator<<(basic_ostream<charT, traits>& out, const char* s);
template<class traits>
  basic_ostream<char, traits>& operator<<(basic_ostream<char, traits>& out, const char* s);
template<class traits>
  basic_ostream<char, traits>& operator<<(basic_ostream<char, traits>& out, const signed char* s);
template<class traits>
  basic_ostream<char, traits>& operator<<(basic_ostream<char, traits>& out,
                                          const unsigned char* s);

Requires: s shall not be a null pointer.

Effects: Behaves like a formatted inserter (as described in [ostream.formatted.reqmts]) of out.

Creates a character sequence seq of n characters starting at s, each widened using out.widen() ([basic.ios.members]), where n is the number that would be computed as if by:

(4.1)
traits::length(s) for the overload where the first argument is of type basic_ostream<charT, traits>& and the second is of type const charT*, and also for the overload where the first argument is of type basic_ostream<char, traits>& and the second is of type const char*,
(4.2)
char_traits<char>::length(s) for the overload where the first argument is of type basic_ostream<charT, traits>& and the second is of type const char*,
(4.3)
traits::length(reinterpret_cast<const char*>(s)) for the other two overloads.

Determines padding for seq as described in [ostream.formatted.reqmts].

Inserts seq into out.

Calls width(0).

30 Input/output library [input.output]

30.7 Formatting and manipulators [iostream.format]

30.7.5 Output streams [output.streams]

30.7.5.2 Formatted output functions [ostream.formatted]

30.7.5.2.4 Character inserter function templates [ostream.inserters.character]