std::char_traits<CharT>::eq, std::char_traits<CharT>::lt

	(1)
static bool eq( char_type a, char_type b );			(until C++11)
static constexpr bool eq( char_type a, char_type b ) noexcept;			(since C++11)
		(2)
static bool lt( char_type a, char_type b );				(until C++11)
static constexpr bool lt( char_type a, char_type b ) noexcept;				(since C++11)

Compares two characters.

1) Compares a and b for equality.

2) Compares a and b in such a way that they are totally ordered.

For the char specialization, eq and lt are defined identically to the built-in operators == and < for type unsigned char (not char).

(since C++11)

a, b

character values to compare

1) true if a and b are equal, false otherwise.

2) true if a is less than b, false otherwise.

Constant.