Boost C++ Libraries

...one of the most highly regarded and expertly designed C++ library projects in the world. Herb Sutter and Andrei Alexandrescu, C++ Coding Standards

PrevUpHomeNext

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.

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" ;

system::result< core::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>


PrevUpHomeNext