grammar::lut_chars

Boost C++ Libraries

grammar::lut_chars

A set of characters.

Synopsis

Defined in header <boost/url/grammar/lut_chars.hpp>

class lut_chars

Member Functions

Name	Description
lut_chars [constructor]	Constructor.
operator()	Return true if ch is in the character set.
operator~	Return a new character set which is the complement of another character set.

Friends

Name	Description
operator+	Return the union of two character sets.
operator-	Return a new character set by subtracting.

Description

The characters defined by instances of this set are provided upon construction. The constexpr implementation allows these to become compile-time constants.

Example

Character sets are used with rules and the functions find_if and find_if_not.

constexpr lut_chars vowel_chars = "AEIOU" "aeiou";

result< string_view > rv = parse( "Aiea", token_rule( vowel_chars ) );

See Also

find_if, find_if_not, parse, token_rule.

Convenience header <boost/url/grammar.hpp>