1 files changed, 78 insertions, 0 deletions
diff --git a/test/std/containers/sequences/vector/vector.erasure/erase.pass.cpp b/test/std/containers/sequences/vector/vector.erasure/erase.pass.cpp
new file mode 100644
index 0000000000000..e88252f1d9201
--- /dev/null
+++ b/test/std/containers/sequences/vector/vector.erasure/erase.pass.cpp
@@ -0,0 +1,78 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+// UNSUPPORTED: c++98, c++03, c++11, c++14, c++17
+
+// <vector>
+
+// template <class T, class Allocator, class U>
+//   void erase(vector<T, Allocator>& c, const U& value);
+  
+
+#include <vector>
+#include <optional>
+
+#include "test_macros.h"
+#include "test_allocator.h"
+#include "min_allocator.h"
+
+template <class S, class U>
+void
+test0(S s,  U val, S expected)
+{
+    ASSERT_SAME_TYPE(void, decltype(std::erase(s, val)));
+    std::erase(s, val);
+    assert(s == expected);
+}
+
+template <class S>
+void test()
+{
+
+    test0(S(), 1, S());
+
+    test0(S({1}), 1, S());
+    test0(S({1}), 2, S({1}));
+
+    test0(S({1,2}), 1, S({2}));
+    test0(S({1,2}), 2, S({1}));
+    test0(S({1,2}), 3, S({1,2}));
+    test0(S({1,1}), 1, S());
+    test0(S({1,1}), 3, S({1,1}));
+
+    test0(S({1,2,3}), 1, S({2,3}));
+    test0(S({1,2,3}), 2, S({1,3}));
+    test0(S({1,2,3}), 3, S({1,2}));
+    test0(S({1,2,3}), 4, S({1,2,3}));
+
+    test0(S({1,1,1}), 1, S());
+    test0(S({1,1,1}), 2, S({1,1,1}));
+    test0(S({1,1,2}), 1, S({2}));
+    test0(S({1,1,2}), 2, S({1,1}));
+    test0(S({1,1,2}), 3, S({1,1,2}));
+    test0(S({1,2,2}), 1, S({2,2}));
+    test0(S({1,2,2}), 2, S({1}));
+    test0(S({1,2,2}), 3, S({1,2,2}));
+
+//  Test cross-type erasure
+    using opt = std::optional<typename S::value_type>;
+    test0(S({1,2,1}), opt(),  S({1,2,1}));
+    test0(S({1,2,1}), opt(1), S({2}));
+    test0(S({1,2,1}), opt(2), S({1,1}));
+    test0(S({1,2,1}), opt(3), S({1,2,1}));
+}
+
+int main()
+{
+    test<std::vector<int>>();
+    test<std::vector<int, min_allocator<int>>> ();
+    test<std::vector<int, test_allocator<int>>> ();
+
+    test<std::vector<long>>();
+    test<std::vector<double>>();
+}