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std::char_traits::eq, std::char_traits::lt

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< cpp‎ | string‎ | char traits
Revision as of 16:14, 5 November 2013 by IMneme (Talk | contribs)

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

Contents

[edit] Parameters

a, b - character values to compare

[edit] Return value

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

[edit] Exceptions

(none) (until C++11)
noexcept specification:  
noexcept
  
(since C++11)

[edit] Complexity

Constant.