restinio/0.6-api/expected_8hpp_source.html

 /*
     restinio
 */

 /*!
     Adoption for std::expected (c++20).

     @since v.0.6.1
 */

 #pragma once

 #if defined(RESTINIO_EXTERNAL_EXPECTED_LITE)
     #include <nonstd/expected.hpp>
 #else
     #include "third_party/expected-lite/expected.hpp"
 #endif

 namespace restinio
 {
     template< typename T, typename E >
     using expected_t = nonstd::expected<T, E>;

 //FIXME: is this symbol actually present in expected-lite?
 //  using nonstd::make_expected;
     using nonstd::make_unexpected;

 } /* namespace restinio */
nonstd
Definition: expected.hpp:132

restinio::opt_value
std::enable_if< std::is_same< Parameter_Container, query_string_params_t >::value||std::is_same< Parameter_Container, router::route_params_t >::value, optional_t< Value_Type > >::type opt_value(const Parameter_Container &params, string_view_t key)
Gets the value of a parameter specified by key wrapped in optional_t<Value_Type> if parameter exists ...
Definition: value_or.hpp:64