C++ (Cpp) basic_string_view::at示例

示例#1

文件： at.pass.cpp 项目： Aj0Ay/libcxx

int main () {
    test ( "ABCDE", 5 );
    test ( "a", 1 );

    test ( L"ABCDE", 5 );
    test ( L"a", 1 );

#if TEST_STD_VER >= 11
    test ( u"ABCDE", 5 );
    test ( u"a", 1 );

    test ( U"ABCDE", 5 );
    test ( U"a", 1 );
#endif

#if TEST_STD_VER >= 11
    {
    constexpr std::experimental::basic_string_view<char> sv ( "ABC", 2 );
    static_assert ( sv.length() ==  2,  "" );
    static_assert ( sv.at(0) == 'A', "" );
    static_assert ( sv.at(1) == 'B', "" );
    }
#endif
}

示例#2

文件： at.pass.cpp 项目： CODECOMMUNITY/libcxx

int main () {
    test ( "ABCDE", 5 );
    test ( "a", 1 );

    test ( L"ABCDE", 5 );
    test ( L"a", 1 );

#if __cplusplus >= 201103L
    test ( u"ABCDE", 5 );
    test ( u"a", 1 );

    test ( U"ABCDE", 5 );
    test ( U"a", 1 );
#endif

#if __cplusplus >= 201103L
    {
    constexpr std::experimental::basic_string_view<char> sv ( "ABC", 2 );
    static_assert ( sv.length() ==  2,  "" );
    static_assert ( sv.at(0) == 'A', "" );
    static_assert ( sv.at(1) == 'B', "" );
    }
#endif
}