The unreserved character set

Synopsis

Declared in header </boost/url/rfc/unreserved_chars.hpp#L44[boost/url/rfc/unreserved_chars.hpp,window=blank_]>

constexpr
const grammar::lut_chars unreserved_chars;

Description

Example

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

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

BNF

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

Specification