boost::urls::url_view_base::size Return the number of characters in the url Synopsis Declared in header <boost/url/url_view_base.hpp> std::size_t size() const noexcept; Description This function returns the number of characters in the url’s encoded string, not including any null terminator, if present. assert( url_view( "file:///Program%20Files" ).size() == 23 ); Constant. Throws nothing.