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

   1 // { dg-options "-std=gnu++17" }
   2 // { dg-do run { target c++17 } }
   3
   4 // Copyright (C) 2019-2020 Free Software Foundation, Inc.
   5 //
   6 // This file is part of the GNU ISO C++ Library.  This library is free
   7 // software; you can redistribute it and/or modify it under the
   8 // terms of the GNU General Public License as published by the
   9 // Free Software Foundation; either version 3, or (at your option)
  10 // any later version.
  11
  12 // This library is distributed in the hope that it will be useful,
  13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 // GNU General Public License for more details.
  16
  17 // You should have received a copy of the GNU General Public License along
  18 // with this library; see the file COPYING3.  If not see
  19 // <http://www.gnu.org/licenses/>.
  20
  21 // C++17 29.8.10 [transform.inclusive.scan]
  22
  23 #include <numeric>
  24 #include <iterator>
  25 #include <testsuite_hooks.h>
  26 #include <testsuite_iterators.h>
  27
  28 int a[] = {1, 2, 3, 4, 5, 6, 7};
  29
  30 using __gnu_test::test_container;
  31 using __gnu_test::input_iterator_wrapper;
  32 using __gnu_test::output_iterator_wrapper;
  33
  34 /*
  35 template<class InputIterator, class OutputIterator, class BinaryOperation,
  36          class UnaryOperation>
  37   OutputIterator
  38   transform_inclusive_scan(InputIterator, InputIterator, OutputIterator,
  39                            BinaryOperation, UnaryOperation);
  40 */
  41 void
  42 test01()
  43 {
  44   int out[7];
  45   test_container<int, output_iterator_wrapper> co(out);
  46   test_container<int, input_iterator_wrapper> ca(a);
  47   auto end = std::transform_inclusive_scan(ca.begin(), ca.end(), co.begin(),
  48                                            std::multiplies<>(),
  49                                            [](int i) { return i+1; });
  50   static_assert(std::is_same_v<decltype(end), decltype(co.begin())>);
  51   VERIFY( end.ptr == out+7 );
  52   VERIFY( out[0] == 2 );
  53   VERIFY( out[1] == (2*3) );
  54   VERIFY( out[2] == (2*3*4) );
  55   VERIFY( out[3] == (2*3*4*5) );
  56   VERIFY( out[4] == (2*3*4*5*6) );
  57   VERIFY( out[5] == (2*3*4*5*6*7) );
  58   VERIFY( out[6] == (2*3*4*5*6*7*8) );
  59 }
  60
  61 /*
  62 template<class InputIterator, class OutputIterator, class BinaryOperation,
  63          class UnaryOperation, class T>
  64   OutputIterator
  65   transform_inclusive_scan(InputIterator, InputIterator, OutputIterator,
  66                            BinaryOperation, UnaryOperation, T);
  67 */
  68 void
  69 test02()
  70 {
  71   int out[7];
  72   test_container<int, output_iterator_wrapper> co(out);
  73   test_container<int, input_iterator_wrapper> ca(a);
  74   auto end = std::transform_inclusive_scan(ca.begin(), ca.end(), co.begin(),
  75                                            std::multiplies<>(),
  76                                            [](int i) { return i+1; },
  77                                            3);
  78   static_assert(std::is_same_v<decltype(end), decltype(co.begin())>);
  79   VERIFY( end.ptr == out+7 );
  80   VERIFY( out[0] == 3*2 );
  81   VERIFY( out[1] == (3*2*3) );
  82   VERIFY( out[2] == (3*2*3*4) );
  83   VERIFY( out[3] == (3*2*3*4*5) );
  84   VERIFY( out[4] == (3*2*3*4*5*6) );
  85   VERIFY( out[5] == (3*2*3*4*5*6*7) );
  86   VERIFY( out[6] == (3*2*3*4*5*6*7*8) );
  87 }
  88
  89 int
  90 main()
  91 {
  92   test01();
  93   test02();
  94 }