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      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 // <string>
     11 
     12 // template<> struct char_traits<char32_t>
     13 
     14 // static char_type* move(char_type* s1, const char_type* s2, size_t n);
     15 
     16 #include <string>
     17 #include <cassert>
     18 
     19 int main()
     20 {
     21 #ifndef _LIBCPP_HAS_NO_UNICODE_CHARS
     22     char32_t s1[] = {1, 2, 3};
     23     assert(std::char_traits<char32_t>::move(s1, s1+1, 2) == s1);
     24     assert(s1[0] == char32_t(2));
     25     assert(s1[1] == char32_t(3));
     26     assert(s1[2] == char32_t(3));
     27     s1[2] = char32_t(0);
     28     assert(std::char_traits<char32_t>::move(s1+1, s1, 2) == s1+1);
     29     assert(s1[0] == char32_t(2));
     30     assert(s1[1] == char32_t(2));
     31     assert(s1[2] == char32_t(3));
     32 #endif  // _LIBCPP_HAS_NO_UNICODE_CHARS
     33 }
     34