[#FB8211166718CBBE1C5BF74D43EEEA9A143599D5]
Set the fragment.
static_url& set_fragment(core::string_view s);
This function sets the fragment to the specified string, which may be empty. An empty fragment is distinct from having no fragment. Reserved characters in the string are percent-escaped in the result.
assert( url("?first=john&last=doe" ).set_encoded_fragment( "john doe" ).encoded_fragment() == "john%20doe" );
this->has_fragment() == true && this->fragment() == s
Linear in `this->size() + s.size()`.
Strong guarantee. Calls to allocate may throw.
fragment = *( pchar / "/" / "?" )