W3cubDocs

/C++

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)

Parameters

a, b - character values to compare

Return value

1) true if a and b are equal, false otherwise.
2) true if a is less than b, false otherwise.

Complexity

Constant.

© cppreference.com
Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.
https://en.cppreference.com/w/cpp/string/char_traits/cmp