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Still more P0202 constexpr-ifying. This batch is: for_each/for_each_n/lexicographical_compare
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@323147 91177308-0d34-0410-b5e6-96231b3b80d8
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@@ -12,14 +12,26 @@
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// template<InputIterator Iter1, InputIterator Iter2>
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// requires HasLess<Iter1::value_type, Iter2::value_type>
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// && HasLess<Iter2::value_type, Iter1::value_type>
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// bool
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// constexpr bool // constexpr after C++17
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// lexicographical_compare(Iter1 first1, Iter1 last1, Iter2 first2, Iter2 last2);
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#include <algorithm>
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#include <cassert>
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#include "test_macros.h"
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#include "test_iterators.h"
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#if TEST_STD_VER > 17
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TEST_CONSTEXPR bool test_constexpr() {
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int ia[] = {1, 2, 3};
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int ib[] = {1, 3, 5, 2, 4, 6};
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return std::lexicographical_compare(std::begin(ia), std::end(ia), std::begin(ib), std::end(ib))
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&& !std::lexicographical_compare(std::begin(ib), std::end(ib), std::begin(ia), std::end(ia))
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;
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}
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#endif
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template <class Iter1, class Iter2>
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void
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test()
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@@ -66,4 +78,8 @@ int main()
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test<const int*, bidirectional_iterator<const int*> >();
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test<const int*, random_access_iterator<const int*> >();
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test<const int*, const int*>();
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#if TEST_STD_VER > 17
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static_assert(test_constexpr());
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#endif
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}
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@@ -12,7 +12,7 @@
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// template<InputIterator Iter1, InputIterator Iter2, CopyConstructible Compare>
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// requires Predicate<Compare, Iter1::value_type, Iter2::value_type>
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// && Predicate<Compare, Iter2::value_type, Iter1::value_type>
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// bool
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// constexpr bool // constexpr after C++17
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// lexicographical_compare(Iter1 first1, Iter1 last1,
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// Iter2 first2, Iter2 last2, Compare comp);
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@@ -20,8 +20,21 @@
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#include <functional>
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#include <cassert>
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#include "test_macros.h"
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#include "test_iterators.h"
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#if TEST_STD_VER > 17
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TEST_CONSTEXPR bool test_constexpr() {
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int ia[] = {1, 2, 3};
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int ib[] = {1, 3, 5, 2, 4, 6};
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std::greater<int> pred;
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return !std::lexicographical_compare(std::begin(ia), std::end(ia), std::begin(ib), std::end(ib), pred)
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&& std::lexicographical_compare(std::begin(ib), std::end(ib), std::begin(ia), std::end(ia), pred)
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;
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}
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#endif
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template <class Iter1, class Iter2>
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void
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test()
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@@ -70,4 +83,8 @@ int main()
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test<const int*, bidirectional_iterator<const int*> >();
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test<const int*, random_access_iterator<const int*> >();
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test<const int*, const int*>();
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#if TEST_STD_VER > 17
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static_assert(test_constexpr());
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#endif
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}
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