boost::urls::grammar::hexdig_value boost::urls::grammar::hexdig_value Return the decimal value of a hex character Synopsis Declared in <boost/url/grammar/hexdig_chars.hpp> signed char hexdig_value(char ch) noexcept; Description This function returns the decimal value of a hexadecimal character, or ‐1 if the argument is not a valid hexadecimal digit. BNF HEXDIG = DIGIT / "A" / "B" / "C" / "D" / "E" / "F" / "a" / "b" / "c" / "d" / "e" / "f" Return Value The decimal value or ‐1 Parameters Name Description ch The character to check Created with MrDocs