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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 indirect_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,
     22                 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23,
     23                 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35,
     24                 36, 37, 38, 39, 40};
     25     const std::size_t N1 = sizeof(a1)/sizeof(a1[0]);
     26     int a2[] = { -0,  -1,  -2,  -3,  -4,  -5,  -6,  -7,  -8,  -9, -10, -11,
     27                 -12, -13, -14, -15, -16, -17, -18, -19, -20, -21, -22, -23};
     28     const std::size_t N2 = sizeof(a2)/sizeof(a2[0]);
     29     std::size_t s[N2] = { 3,  4,  5,  7,  8,  9, 11, 12, 13, 15, 16, 17,
     30                          22, 23, 24, 26, 27, 28, 30, 31, 32, 34, 35, 36};
     31     std::valarray<int> v1(a1, N1);
     32     std::valarray<int> v2(a2, N2);
     33     std::valarray<std::size_t> ia(s, N2);
     34     v1[ia] += v2;
     35     assert(v1.size() == 41);
     36     assert(v1[ 0] ==  0);
     37     assert(v1[ 1] ==  1);
     38     assert(v1[ 2] ==  2);
     39     assert(v1[ 3] ==  3);
     40     assert(v1[ 4] ==  3);
     41     assert(v1[ 5] ==  3);
     42     assert(v1[ 6] ==  6);
     43     assert(v1[ 7] ==  4);
     44     assert(v1[ 8] ==  4);
     45     assert(v1[ 9] ==  4);
     46     assert(v1[10] == 10);
     47     assert(v1[11] ==  5);
     48     assert(v1[12] ==  5);
     49     assert(v1[13] ==  5);
     50     assert(v1[14] == 14);
     51     assert(v1[15] ==  6);
     52     assert(v1[16] ==  6);
     53     assert(v1[17] ==  6);
     54     assert(v1[18] == 18);
     55     assert(v1[19] == 19);
     56     assert(v1[20] == 20);
     57     assert(v1[21] == 21);
     58     assert(v1[22] == 10);
     59     assert(v1[23] == 10);
     60     assert(v1[24] == 10);
     61     assert(v1[25] == 25);
     62     assert(v1[26] == 11);
     63     assert(v1[27] == 11);
     64     assert(v1[28] == 11);
     65     assert(v1[29] == 29);
     66     assert(v1[30] == 12);
     67     assert(v1[31] == 12);
     68     assert(v1[32] == 12);
     69     assert(v1[33] == 33);
     70     assert(v1[34] == 13);
     71     assert(v1[35] == 13);
     72     assert(v1[36] == 13);
     73     assert(v1[37] == 37);
     74     assert(v1[38] == 38);
     75     assert(v1[39] == 39);
     76     assert(v1[40] == 40);
     77 }
     78