A CharSet is a unary predicate which is invocable with this equivalent signature:

bool( char ch ) const noexcept;

The predicate returns true if ch is a member of the set, or false otherwise.

Related Identifiers

is_charset, find_if, find_if_not.

Requirements

In this table:

  • T is a type meeting the requirements of CharSet

  • t is a const value of type T

  • c is a value of type char

  • first, last are values of type char const*