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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 // <valarray>
     11 
     12 // template <class T> class slice_array
     13 
     14 // void operator<<=(const valarray<value_type>& v) const;
     15 
     16 #include <valarray>
     17 #include <cassert>
     18 
     19 int main()
     20 {
     21     int a1[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15};
     22     int a2[] = {1, 2, 3, 4, 5};
     23     std::valarray<int> v1(a1, sizeof(a1)/sizeof(a1[0]));
     24     std::valarray<int> v2(a2, sizeof(a2)/sizeof(a2[0]));
     25     v1[std::slice(1, 5, 3)] <<= v2;
     26     assert(v1.size() == 16);
     27     assert(v1[ 0] ==  0);
     28     assert(v1[ 1] ==  2);
     29     assert(v1[ 2] ==  2);
     30     assert(v1[ 3] ==  3);
     31     assert(v1[ 4] == 16);
     32     assert(v1[ 5] ==  5);
     33     assert(v1[ 6] ==  6);
     34     assert(v1[ 7] == 56);
     35     assert(v1[ 8] ==  8);
     36     assert(v1[ 9] ==  9);
     37     assert(v1[10] == 160);
     38     assert(v1[11] == 11);
     39     assert(v1[12] == 12);
     40     assert(v1[13] == 416);
     41     assert(v1[14] == 14);
     42     assert(v1[15] == 15);
     43 }
     44