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Rule for a string with percent-encoded escapes.
Defined in header <boost/url/rfc/pct_encoded_rule.hpp>
template< class CharSet> constexpr implementation-defined pct_encoded_rule( CharSet const& cs);
This function returns a rule which matches a percent-encoded string, permitting characters in the string which are also in the specified character set to be used unescaped.
using value_type = pct_string_view;
Rules are used with the function grammar::parse.
// pchar = unreserved / pct-encoded / sub-delims / ":" / "@" result< pct_string_view > rv = grammar::parse( "Program%20Files", pct_encoded_rule( pchars ) );
pct-encoded = "%" HEXDIG HEXDIG
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Name |
Description |
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The character set indicating which characters are allowed without escapes. Any character which is not in this set must be escaped, or else parsing returns an error. |
grammar::parse,
pchars,
pct_string_view.
Convenience header <boost/url.hpp>