test/std/strings/string.view/string.view.ops/compare.sv.pass.cpp

   1 //===----------------------------------------------------------------------===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is dual licensed under the MIT and the University of Illinois Open
   6 // Source Licenses. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10
  11 // <string_view>
  12 // constexpr int compare(basic_string_view str) const noexcept;
  13
  14 #include <string_view>
  15 #include <cassert>
  16
  17 #include "test_macros.h"
  18 #include "constexpr_char_traits.hpp"
  19
  20 int sign ( int x ) { return x > 0 ? 1 : ( x < 0 ? -1 : 0 ); }
  21
  22 template<typename CharT>
  23 void test1 ( std::basic_string_view<CharT> sv1,
  24             std::basic_string_view<CharT> sv2, int expected ) {
  25     assert ( sign( sv1.compare(sv2)) == sign(expected));
  26 }
  27
  28
  29 template<typename CharT>
  30 void test ( const CharT *s1, const CharT  *s2, int expected ) {
  31     typedef std::basic_string_view<CharT> string_view_t;
  32
  33     string_view_t sv1 ( s1 );
  34     string_view_t sv2 ( s2 );
  35     test1(sv1, sv2, expected);
  36 }
  37
  38 int main () {
  39
  40     test("",                     "", 0);
  41     test("",                     "abcde", -5);
  42     test("",                     "abcdefghij", -10);
  43     test("",                     "abcdefghijklmnopqrst", -20);
  44     test("abcde",                "", 5);
  45     test("abcde",                "abcde", 0);
  46     test("abcde",                "abcdefghij", -5);
  47     test("abcde",                "abcdefghijklmnopqrst", -15);
  48     test("abcdefghij",           "", 10);
  49     test("abcdefghij",           "abcde", 5);
  50     test("abcdefghij",           "abcdefghij", 0);
  51     test("abcdefghij",           "abcdefghijklmnopqrst", -10);
  52     test("abcdefghijklmnopqrst", "", 20);
  53     test("abcdefghijklmnopqrst", "abcde", 15);
  54     test("abcdefghijklmnopqrst", "abcdefghij", 10);
  55     test("abcdefghijklmnopqrst", "abcdefghijklmnopqrst", 0);
  56
  57     test(L"",                     L"", 0);
  58     test(L"",                     L"abcde", -5);
  59     test(L"",                     L"abcdefghij", -10);
  60     test(L"",                     L"abcdefghijklmnopqrst", -20);
  61     test(L"abcde",                L"", 5);
  62     test(L"abcde",                L"abcde", 0);
  63     test(L"abcde",                L"abcdefghij", -5);
  64     test(L"abcde",                L"abcdefghijklmnopqrst", -15);
  65     test(L"abcdefghij",           L"", 10);
  66     test(L"abcdefghij",           L"abcde", 5);
  67     test(L"abcdefghij",           L"abcdefghij", 0);
  68     test(L"abcdefghij",           L"abcdefghijklmnopqrst", -10);
  69     test(L"abcdefghijklmnopqrst", L"", 20);
  70     test(L"abcdefghijklmnopqrst", L"abcde", 15);
  71     test(L"abcdefghijklmnopqrst", L"abcdefghij", 10);
  72     test(L"abcdefghijklmnopqrst", L"abcdefghijklmnopqrst", 0);
  73
  74 #if TEST_STD_VER >= 11
  75     test(u"",                     u"", 0);
  76     test(u"",                     u"abcde", -5);
  77     test(u"",                     u"abcdefghij", -10);
  78     test(u"",                     u"abcdefghijklmnopqrst", -20);
  79     test(u"abcde",                u"", 5);
  80     test(u"abcde",                u"abcde", 0);
  81     test(u"abcde",                u"abcdefghij", -5);
  82     test(u"abcde",                u"abcdefghijklmnopqrst", -15);
  83     test(u"abcdefghij",           u"", 10);
  84     test(u"abcdefghij",           u"abcde", 5);
  85     test(u"abcdefghij",           u"abcdefghij", 0);
  86     test(u"abcdefghij",           u"abcdefghijklmnopqrst", -10);
  87     test(u"abcdefghijklmnopqrst", u"", 20);
  88     test(u"abcdefghijklmnopqrst", u"abcde", 15);
  89     test(u"abcdefghijklmnopqrst", u"abcdefghij", 10);
  90     test(u"abcdefghijklmnopqrst", u"abcdefghijklmnopqrst", 0);
  91
  92     test(U"",                     U"", 0);
  93     test(U"",                     U"abcde", -5);
  94     test(U"",                     U"abcdefghij", -10);
  95     test(U"",                     U"abcdefghijklmnopqrst", -20);
  96     test(U"abcde",                U"", 5);
  97     test(U"abcde",                U"abcde", 0);
  98     test(U"abcde",                U"abcdefghij", -5);
  99     test(U"abcde",                U"abcdefghijklmnopqrst", -15);
 100     test(U"abcdefghij",           U"", 10);
 101     test(U"abcdefghij",           U"abcde", 5);
 102     test(U"abcdefghij",           U"abcdefghij", 0);
 103     test(U"abcdefghij",           U"abcdefghijklmnopqrst", -10);
 104     test(U"abcdefghijklmnopqrst", U"", 20);
 105     test(U"abcdefghijklmnopqrst", U"abcde", 15);
 106     test(U"abcdefghijklmnopqrst", U"abcdefghij", 10);
 107     test(U"abcdefghijklmnopqrst", U"abcdefghijklmnopqrst", 0);
 108 #endif
 109
 110 #if TEST_STD_VER > 11
 111     {
 112     typedef std::basic_string_view<char, constexpr_char_traits<char>> SV;
 113     constexpr SV  sv1 { "abcde", 5 };
 114     constexpr SV  sv2 { "abcde", 5 };
 115     constexpr SV  sv3 { "edcba0", 6 };
 116     static_assert ( sv1.compare(sv2) == 0, "" );
 117     static_assert ( sv2.compare(sv1) == 0, "" );
 118     static_assert ( sv3.compare(sv2)  > 0, "" );
 119     static_assert ( sv2.compare(sv3)  < 0, "" );
 120     }
 121 #endif
 122 }