size Return the number of params Synopsis size_t size() const noexcept; Declared in file <include/boost/url/params_encoded_base.hpp> on line 208 Defined in file <src/params_encoded_base.cpp> on line 72 Description Example assert( url_view( "?key=value").encoded_params().size() == 1 ); Complexity Constant. Exception Safety Throws nothing.