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More P0202 constexpr-ifying in <algorithm>. This commit handles replace/replace_if/replace_copy/replace_copy_if.

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git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@322975 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Marshall Clow
2018-01-19 18:07:29 +00:00
parent ecd1909f5f
commit a75d61347e
5 changed files with 92 additions and 16 deletions
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21
test/std/algorithms/alg.modifying.operations/alg.replace/replace_if.pass.cpp
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@@ -13,16 +13,29 @@
// requires OutputIterator<Iter, Iter::reference>
// && OutputIterator<Iter, const T&>
// && CopyConstructible<Pred>
// void
// constexpr void // constexpr after C++17
// replace_if(Iter first, Iter last, Pred pred, const T& new_value);
#include <algorithm>
#include <functional>
#include <cassert>
#include "test_macros.h"
#include "test_iterators.h"
bool equalToTwo(int v) { return v == 2; }
TEST_CONSTEXPR bool equalToTwo(int v) { return v == 2; }
#if TEST_STD_VER > 17
TEST_CONSTEXPR bool test_constexpr() {
int ia[] = {0, 1, 2, 3, 4};
const int expected[] = {0, 1, 5, 3, 4};
std::replace_if(std::begin(ia), std::end(ia), equalToTwo, 5);
return std::equal(std::begin(ia), std::end(ia), std::begin(expected), std::end(expected))
;
}
#endif
template <class Iter>
void
@@ -44,4 +57,8 @@ int main()
test<bidirectional_iterator<int*> >();
test<random_access_iterator<int*> >();
test<int*>();
#if TEST_STD_VER > 17
static_assert(test_constexpr());
#endif
}