libcxx/test/std/strings/string.view/string.view.hash/enabled_hashes.pass.cpp

   1 //===----------------------------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 // UNSUPPORTED: c++03
  10 // UNSUPPORTED: !stdlib=libc++ && (c++11 || c++14)
  11
  12 // <string_view>
  13
  14 // Test that <string_view> provides all of the arithmetic, enum, and pointer
  15 // hash specializations.
  16
  17 #include <string_view>
  18
  19 #include "constexpr_char_traits.h"
  20 #include "poisoned_hash_helper.h"
  21 #include "test_macros.h"
  22
  23 struct MyChar {
  24   char c;
  25 };
  26
  27 template <>
  28 struct std::char_traits<MyChar> {
  29   using char_type  = MyChar;
  30   using int_type   = std::char_traits<char>::int_type;
  31   using off_type   = std::char_traits<char>::off_type;
  32   using pos_type   = std::char_traits<char>::pos_type;
  33   using state_type = std::char_traits<char>::state_type;
  34
  35   static void assign(char_type&, const char_type&);
  36   static bool eq(char_type, char_type);
  37   static bool lt(char_type, char_type);
  38
  39   static int compare(const char_type*, const char_type*, std::size_t);
  40   static std::size_t length(const char_type*);
  41   static const char_type* find(const char_type*, std::size_t, const char_type&);
  42   static char_type* move(char_type*, const char_type*, std::size_t);
  43   static char_type* copy(char_type*, const char_type*, std::size_t);
  44   static char_type* assign(char_type*, std::size_t, char_type);
  45
  46   static int_type not_eof(int_type);
  47   static char_type to_char_type(int_type);
  48   static int_type to_int_type(char_type);
  49   static bool eq_int_type(int_type, int_type);
  50   static int_type eof();
  51 };
  52
  53 int main(int, char**) {
  54   test_library_hash_specializations_available();
  55   {
  56     test_hash_enabled<std::string_view>();
  57 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
  58     test_hash_enabled<std::wstring_view>();
  59 #endif
  60 #ifndef TEST_HAS_NO_CHAR8_T
  61     test_hash_enabled<std::u8string_view>();
  62 #endif
  63     test_hash_enabled<std::u16string_view>();
  64     test_hash_enabled<std::u32string_view>();
  65     test_hash_disabled<std::basic_string_view<MyChar, std::char_traits<MyChar>>>();
  66     test_hash_disabled<std::basic_string_view<char, constexpr_char_traits<char>>>();
  67   }
  68
  69   return 0;
  70 }