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A set of characters.
Defined in header <boost/url/grammar/lut_chars.hpp>
class lut_chars
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Name |
Description |
|---|---|
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lut_chars [constructor] |
Constructor. |
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Return true if ch is in the character set. |
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Return a new character set which is the complement of another character set. |
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Name |
Description |
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Return the union of two character sets. |
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Return a new character set by subtracting. |
The characters defined by instances of this set are provided upon construction.
The constexpr implementation
allows these to become compile-time constants.
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 ) );
find_if,
find_if_not,
parse,
token_rule.
Convenience header <boost/url/grammar.hpp>