libcxx/test/std/algorithms/alg.modifying.operations/alg.fill/fill.pass.cpp

   1 //===----------------------------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 // <algorithm>
  10
  11 // template<ForwardIterator Iter, class T>
  12 //   requires OutputIterator<Iter, const T&>
  13 //   constexpr void      // constexpr after C++17
  14 //   fill(Iter first, Iter last, const T& value);
  15
  16 #include <algorithm>
  17 #include <cassert>
  18
  19 #include "test_macros.h"
  20 #include "test_iterators.h"
  21
  22 #if TEST_STD_VER > 17
  23 TEST_CONSTEXPR bool test_constexpr() {
  24     int ia[] = {0, 1, 2, 3, 4};
  25
  26     std::fill(std::begin(ia), std::end(ia), 5);
  27
  28     return std::all_of(std::begin(ia), std::end(ia), [](int a) {return a == 5; })
  29         ;
  30     }
  31 #endif
  32
  33 template <class Iter>
  34 void
  35 test_char()
  36 {
  37     const unsigned n = 4;
  38     char ca[n] = {0};
  39     std::fill(Iter(ca), Iter(ca+n), char(1));
  40     assert(ca[0] == 1);
  41     assert(ca[1] == 1);
  42     assert(ca[2] == 1);
  43     assert(ca[3] == 1);
  44 }
  45
  46 template <class Iter>
  47 void
  48 test_int()
  49 {
  50     const unsigned n = 4;
  51     int ia[n] = {0};
  52     std::fill(Iter(ia), Iter(ia+n), 1);
  53     assert(ia[0] == 1);
  54     assert(ia[1] == 1);
  55     assert(ia[2] == 1);
  56     assert(ia[3] == 1);
  57 }
  58
  59 int main(int, char**)
  60 {
  61     test_char<forward_iterator<char*> >();
  62     test_char<bidirectional_iterator<char*> >();
  63     test_char<random_access_iterator<char*> >();
  64     test_char<char*>();
  65
  66     test_int<forward_iterator<int*> >();
  67     test_int<bidirectional_iterator<int*> >();
  68     test_int<random_access_iterator<int*> >();
  69     test_int<int*>();
  70
  71 #if TEST_STD_VER > 17
  72     static_assert(test_constexpr());
  73 #endif
  74
  75   return 0;
  76 }