libstdc++-v3/testsuite/26_numerics/transform_inclusive_scan/1.cc

   1 // { dg-do run { target c++17 } }
   2
   3 // Copyright (C) 2019-2024 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 3, or (at your option)
   9 // any later version.
  10
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING3.  If not see
  18 // <http://www.gnu.org/licenses/>.
  19
  20 // C++17 29.8.10 [transform.inclusive.scan]
  21
  22 #include <numeric>
  23 #include <iterator>
  24 #include <testsuite_hooks.h>
  25 #include <testsuite_iterators.h>
  26
  27 int a[] = {1, 2, 3, 4, 5, 6, 7};
  28
  29 using __gnu_test::test_container;
  30 using __gnu_test::input_iterator_wrapper;
  31 using __gnu_test::output_iterator_wrapper;
  32
  33 /*
  34 template<class InputIterator, class OutputIterator, class BinaryOperation,
  35          class UnaryOperation>
  36   OutputIterator
  37   transform_inclusive_scan(InputIterator, InputIterator, OutputIterator,
  38                            BinaryOperation, UnaryOperation);
  39 */
  40 void
  41 test01()
  42 {
  43   int out[7];
  44   test_container<int, output_iterator_wrapper> co(out);
  45   test_container<int, input_iterator_wrapper> ca(a);
  46   auto end = std::transform_inclusive_scan(ca.begin(), ca.end(), co.begin(),
  47                                            std::multiplies<>(),
  48                                            [](int i) { return i+1; });
  49   static_assert(std::is_same_v<decltype(end), decltype(co.begin())>);
  50   VERIFY( end.ptr == out+7 );
  51   VERIFY( out[0] == 2 );
  52   VERIFY( out[1] == (2*3) );
  53   VERIFY( out[2] == (2*3*4) );
  54   VERIFY( out[3] == (2*3*4*5) );
  55   VERIFY( out[4] == (2*3*4*5*6) );
  56   VERIFY( out[5] == (2*3*4*5*6*7) );
  57   VERIFY( out[6] == (2*3*4*5*6*7*8) );
  58 }
  59
  60 /*
  61 template<class InputIterator, class OutputIterator, class BinaryOperation,
  62          class UnaryOperation, class T>
  63   OutputIterator
  64   transform_inclusive_scan(InputIterator, InputIterator, OutputIterator,
  65                            BinaryOperation, UnaryOperation, T);
  66 */
  67 void
  68 test02()
  69 {
  70   int out[7];
  71   test_container<int, output_iterator_wrapper> co(out);
  72   test_container<int, input_iterator_wrapper> ca(a);
  73   auto end = std::transform_inclusive_scan(ca.begin(), ca.end(), co.begin(),
  74                                            std::multiplies<>(),
  75                                            [](int i) { return i+1; },
  76                                            3);
  77   static_assert(std::is_same_v<decltype(end), decltype(co.begin())>);
  78   VERIFY( end.ptr == out+7 );
  79   VERIFY( out[0] == 3*2 );
  80   VERIFY( out[1] == (3*2*3) );
  81   VERIFY( out[2] == (3*2*3*4) );
  82   VERIFY( out[3] == (3*2*3*4*5) );
  83   VERIFY( out[4] == (3*2*3*4*5*6) );
  84   VERIFY( out[5] == (3*2*3*4*5*6*7) );
  85   VERIFY( out[6] == (3*2*3*4*5*6*7*8) );
  86 }
  87
  88 int
  89 main()
  90 {
  91   test01();
  92   test02();
  93 }