any_of.cpp 2.3 KB

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  1. // Range v3 library
  2. //
  3. // Copyright Andrew Sutton 2014
  4. // Copyright Gonzalo Brito Gadeschi 2014
  5. //
  6. // Use, modification and distribution is subject to the
  7. // Boost Software License, Version 1.0. (See accompanying
  8. // file LICENSE_1_0.txt or copy at
  9. // http://www.boost.org/LICENSE_1_0.txt)
  10. //
  11. // Project home: https://github.com/ericniebler/range-v3
  12. #include <vector>
  13. #include <range/v3/core.hpp>
  14. #include <range/v3/algorithm/any_of.hpp>
  15. #include "../simple_test.hpp"
  16. constexpr bool even(int n)
  17. {
  18. return n % 2 == 0;
  19. }
  20. struct S {
  21. S(bool p) : test(p) { }
  22. bool p() const { return test; }
  23. bool test;
  24. };
  25. constexpr bool test_constexpr(std::initializer_list<int> il)
  26. {
  27. return ranges::any_of(il, even);
  28. }
  29. int main()
  30. {
  31. std::vector<int> all_even { 0, 2, 4, 6 };
  32. std::vector<int> one_even { 1, 3, 4, 7 };
  33. std::vector<int> none_even { 1, 3, 5, 7 };
  34. CHECK(ranges::any_of(all_even.begin(), all_even.end(), even));
  35. CHECK(ranges::any_of(one_even.begin(), one_even.end(), even));
  36. CHECK(!ranges::any_of(none_even.begin(), none_even.end(), even));
  37. CHECK(ranges::any_of(all_even, even));
  38. CHECK(ranges::any_of(one_even, even));
  39. CHECK(!ranges::any_of(none_even, even));
  40. using ILI = std::initializer_list<int>;
  41. CHECK(ranges::any_of(ILI{0, 2, 4, 6}, [](int n) { return n % 2 == 0; }));
  42. CHECK(ranges::any_of(ILI{1, 3, 4, 7}, [](int n) { return n % 2 == 0; }));
  43. CHECK(!ranges::any_of(ILI{1, 3, 5, 7}, [](int n) { return n % 2 == 0; }));
  44. std::vector<S> all_true { true, true, true };
  45. std::vector<S> one_true { false, false, true };
  46. std::vector<S> none_true { false, false, false };
  47. CHECK(ranges::any_of(all_true.begin(), all_true.end(), &S::p));
  48. CHECK(ranges::any_of(one_true.begin(), one_true.end(), &S::p));
  49. CHECK(!ranges::any_of(none_true.begin(), none_true.end(), &S::p));
  50. CHECK(ranges::any_of(all_true, &S::p));
  51. CHECK(ranges::any_of(one_true, &S::p));
  52. CHECK(!ranges::any_of(none_true, &S::p));
  53. using ILS = std::initializer_list<S>;
  54. CHECK(ranges::any_of(ILS{S(true), S(true), S(true)}, &S::p));
  55. CHECK(ranges::any_of(ILS{S(false), S(true), S(false)}, &S::p));
  56. CHECK(!ranges::any_of(ILS{S(false), S(false), S(false)}, &S::p));
  57. STATIC_CHECK(test_constexpr({0, 2, 4, 6}));
  58. STATIC_CHECK(test_constexpr({1, 3, 4, 7}));
  59. STATIC_CHECK(!test_constexpr({1, 3, 5, 7}));
  60. return ::test_result();
  61. }