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The set of decimal digits.
Defined in header <boost/url/grammar/digit_chars.hpp>
constexpr implementation-defined digit_chars;
Character sets are used with rules and the functions find_if
and find_if_not
.
system::result< core::string_view > rv = [link url.ref.boost__urls__grammar__parse `parse`]( "2022" , [link url.ref.boost__urls__grammar__token_rule `token_rule`]( [link url.ref.boost__urls__grammar__digit_chars `digit_chars`] ) );
DIGIT = %x30-39 ; 0-9
find_if
,
find_if_not
,
parse
,
token_rule
.
Convenience header <boost/url/grammar.hpp>