boost::urls::grammar::not_empty_rule

Match another rule, if the result is not empty

Synopsis

Declared in <boost/url/grammar/not_empty_rule.hpp>

template<Rule R>
constexpr
/* implementation-defined */
not_empty_rule(R const& r);

This adapts another rule such that when an empty string is successfully parsed, the result is an error.


using value_type = typename Rule::value_type;

Rules are used with the function parse.


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

The adapted rule

Name	Description
r	The rule to match