29 typedef std::wstring_view::size_type csize_type;
30 typedef std::wstring_view::const_reference cref;
31 typedef std::wstring_view::reference ref;
32 csize_type csz01, csz02;
34 const std::wstring_view str01(
L"tamarindo, costa rica");
35 std::wstring_view str02(
L"41st street beach, capitola, california");
36 std::wstring_view str03;
40 cref cref1 = str01[csz01 - 1];
48 cref cref3 = str01.at(csz01 - 1);
55 catch (std::out_of_range& fail)