Function usingContextualConversions

test/snippets.cpp:1014–1120

}

void
usingContextualConversions()
{
    using namespace user_ns;
    using namespace boost::json;
    {
// tag::doc_context_conversion_2[]
        ip_address addr( 192, 168, 10, 11 );

        value jv = value_from( addr, as_string() );
        assert( jv == parse(R"( "192.168.10.11" )") );

        ip_address addr2 = value_to< ip_address >( jv, as_string() );
        assert(std::equal(
            addr.begin(), addr.end(), addr2.begin() ));
// end::doc_context_conversion_2[]
        (void)addr2;
    }

    {
// tag::doc_context_conversion_3[]
        std::map< std::string, ip_address > computers = {
            { "Alex", { 192, 168, 1, 1 } },
            { "Blake", { 192, 168, 1, 2 } },
            { "Carol", { 192, 168, 1, 3 } },
        };
        value jv = value_from( computers, as_string() );
        assert( jv == parse(
            "{                               "
            "    \"Alex\" : \"192.168.1.1\", "
            "    \"Blake\": \"192.168.1.2\", "
            "    \"Carol\": \"192.168.1.3\"  "
            "}                               "
            ) );
// end::doc_context_conversion_3[]
        (void)jv;
    }

    {
// tag::doc_context_conversion_5[]
        std::chrono::system_clock::time_point tp;
        value jv = value_from( tp, as_iso_8601() );
        assert( jv == parse(R"( "1970-01-01T00:00:00" )") );
// end::doc_context_conversion_5[]
        (void)jv;
    }

    {
// tag::doc_context_conversion_7[]
        std::chrono::system_clock::time_point tp;

        value jv = value_from( tp, date_format{ "%T %D", 18 } );
        assert( jv == parse(R"( "00:00:00 01/01/70" )") );

        jv = value_from( tp, as_iso_8601() );
        assert( jv == parse(R"( "1970-01-01T00:00:00" )") );
// end::doc_context_conversion_7[]
        (void)jv;