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The set of hexadecimal digits.
Defined in header <boost/url/grammar/hexdig_chars.hpp>
constexpr implementation-defined hexdig_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`]( "8086FC19" , [link url.ref.boost__urls__grammar__token_rule `token_rule`]( [link url.ref.boost__urls__grammar__hexdig_chars `hexdig_chars`] ) );
HEXDIG = DIGIT / "A" / "B" / "C" / "D" / "E" / "F" / "a" / "b" / "c" / "d" / "e" / "f"
The RFCs are inconsistent on the case sensitivity of hexadecimal digits. Existing uses suggest case-insensitivity is a de-facto standard.
find_if
,
find_if_not
,
hexdig_value
, parse
, token_rule
.
Convenience header <boost/url/grammar.hpp>