More P0202 constexpr-ifying. All the find_XXX algorithms in this commit.

llvm-svn: 322504

1 files changed, 16 insertions, 1 deletions

diff --git a/libcxx/test/std/algorithms/alg.nonmodifying/alg.find/find.pass.cpp b/libcxx/test/std/algorithms/alg.nonmodifying/alg.find/find.pass.cpp
index 09f0f41215c..faff926d3d6 100644
--- a/libcxx/test/std/algorithms/alg.nonmodifying/alg.find/find.pass.cpp
+++ b/libcxx/test/std/algorithms/alg.nonmodifying/alg.find/find.pass.cpp
@@ -11,14 +11,25 @@
 
 // template<InputIterator Iter, class T>
 //   requires HasEqualTo<Iter::value_type, T>
-//   Iter
+//   constexpr Iter   // constexpr after C++17
 //   find(Iter first, Iter last, const T& 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[] = {1, 3, 5, 2, 4, 6};
+    int ib[] = {1, 2, 3, 4, 5, 6};
+    return    (std::find(std::begin(ia), std::end(ia), 5) == ia+2)
+           && (std::find(std::begin(ib), std::end(ib), 9) == ib+6)
+           ;
+    }
+#endif
+
 int main()
 {
     int ia[] = {0, 1, 2, 3, 4, 5};
@@ -28,4 +39,8 @@ int main()
     assert(*r == 3);
     r = std::find(input_iterator<const int*>(ia), input_iterator<const int*>(ia+s), 10);
     assert(r == input_iterator<const int*>(ia+s));
+
+#if TEST_STD_VER > 17
+    static_assert(test_constexpr());
+#endif
 }