vendor/libc++/libc++-trunk-r338150

1 files changed, 18 insertions, 1 deletions

diff --git a/test/std/algorithms/alg.modifying.operations/alg.replace/replace.pass.cpp b/test/std/algorithms/alg.modifying.operations/alg.replace/replace.pass.cpp
index f6033351ffca4..56a744b2c9d42 100644
--- a/test/std/algorithms/alg.modifying.operations/alg.replace/replace.pass.cpp
+++ b/test/std/algorithms/alg.modifying.operations/alg.replace/replace.pass.cpp
@@ -13,14 +13,27 @@
 //   requires OutputIterator<Iter, Iter::reference>
 //         && OutputIterator<Iter, const T&>
 //         && HasEqualTo<Iter::value_type, T>
-//   void
+//   constexpr void      // constexpr after C++17
 //   replace(Iter first, Iter last, const T& old_value, const T& new_value);
 
 #include <algorithm>
 #include <cassert>
 
+#include "test_macros.h"
 #include "test_iterators.h"
 
+
+#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(std::begin(ia), std::end(ia), 2, 5);
+    return std::equal(std::begin(ia), std::end(ia), std::begin(expected), std::end(expected))
+        ;
+    }
+#endif
+
 template <class Iter>
 void
 test()
@@ -41,4 +54,8 @@ int main()
     test<bidirectional_iterator<int*> >();
     test<random_access_iterator<int*> >();
     test<int*>();
+
+#if TEST_STD_VER > 17
+    static_assert(test_constexpr());
+#endif
 }