The unreserved character set.

Synopsis

Defined in header <boost/url/rfc/unreserved_chars.hpp>

constexpr grammar::lut_chars unreserved_chars =
    "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
    "abcdefghijklmnopqrstuvwxyz"
    "0123456789"
    "-._~";

Example

Character sets are used with rules and the functions grammar::find_if and grammar::find_if_not.

result< decode_view > rv = grammar::parse( "Program%20Files", pct_encoded_rule( unreserved_chars ) );

BNF

unreserved    = ALPHA / DIGIT / "-" / "." / "_" / "~"

Specification

See Also

grammar::find_if, grammar::find_if_not, grammar::parse, pct_encoded_rule.

Convenience header <boost/url.hpp>