1 files changed, 113 insertions, 0 deletions
diff --git a/test/std/containers/views/span.cons/ptr_len.pass.cpp b/test/std/containers/views/span.cons/ptr_len.pass.cpp
new file mode 100644
index 0000000000000..7302759bcc641
--- /dev/null
+++ b/test/std/containers/views/span.cons/ptr_len.pass.cpp
@@ -0,0 +1,113 @@
+// -*- C++ -*-
+//===------------------------------ span ---------------------------------===//
+//
+//                     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 
+
+// <span>
+
+// constexpr span(pointer ptr, index_type count);
+// Requires: [ptr, ptr + count) shall be a valid range. 
+//  If extent is not equal to dynamic_extent, then count shall be equal to extent.
+//
+
+#include <span>
+#include <cassert>
+#include <string>
+
+#include "test_macros.h"
+
+void checkCV()
+{
+                   int   arr[] = {1,2,3};
+    const          int  carr[] = {4,5,6};
+          volatile int  varr[] = {7,8,9};
+    const volatile int cvarr[] = {1,3,5};
+
+//  Types the same (dynamic sized)
+    {
+    std::span<               int> s1{  arr, 3}; // a span<               int> pointing at int.
+    std::span<const          int> s2{ carr, 3}; // a span<const          int> pointing at const int.
+    std::span<      volatile int> s3{ varr, 3}; // a span<      volatile int> pointing at volatile int.
+    std::span<const volatile int> s4{cvarr, 3}; // a span<const volatile int> pointing at const volatile int.
+    assert(s1.size() + s2.size() + s3.size() + s4.size() == 12);
+    }
+
+//  Types the same (static sized)
+    {
+    std::span<               int,3> s1{  arr, 3};   // a span<               int> pointing at int.
+    std::span<const          int,3> s2{ carr, 3};   // a span<const          int> pointing at const int.
+    std::span<      volatile int,3> s3{ varr, 3};   // a span<      volatile int> pointing at volatile int.
+    std::span<const volatile int,3> s4{cvarr, 3};   // a span<const volatile int> pointing at const volatile int.
+    assert(s1.size() + s2.size() + s3.size() + s4.size() == 12);
+    }
+
+
+//  types different (dynamic sized)
+    {
+    std::span<const          int> s1{ arr, 3};      // a span<const          int> pointing at int.
+    std::span<      volatile int> s2{ arr, 3};      // a span<      volatile int> pointing at int.
+    std::span<      volatile int> s3{ arr, 3};      // a span<      volatile int> pointing at const int.
+    std::span<const volatile int> s4{ arr, 3};      // a span<const volatile int> pointing at int.
+    std::span<const volatile int> s5{carr, 3};      // a span<const volatile int> pointing at const int.
+    std::span<const volatile int> s6{varr, 3};      // a span<const volatile int> pointing at volatile int.
+    assert(s1.size() + s2.size() + s3.size() + s4.size() + s5.size() + s6.size() == 18);
+    }
+
+//  types different (static sized)
+    {
+    std::span<const          int,3> s1{ arr, 3};    // a span<const          int> pointing at int.
+    std::span<      volatile int,3> s2{ arr, 3};    // a span<      volatile int> pointing at int.
+    std::span<      volatile int,3> s3{ arr, 3};    // a span<      volatile int> pointing at const int.
+    std::span<const volatile int,3> s4{ arr, 3};    // a span<const volatile int> pointing at int.
+    std::span<const volatile int,3> s5{carr, 3};    // a span<const volatile int> pointing at const int.
+    std::span<const volatile int,3> s6{varr, 3};    // a span<const volatile int> pointing at volatile int.
+    assert(s1.size() + s2.size() + s3.size() + s4.size() + s5.size() + s6.size() == 18);
+    }
+}
+
+
+template <typename T>
+constexpr bool testConstexprSpan()
+{
+    constexpr T val[2] = {};
+    std::span<const T>   s1{val, 2};
+    std::span<const T,2> s2{val, 2};
+    return
+        s1.data() == &val[0] && s1.size() == 2
+    &&  s2.data() == &val[0] && s2.size() == 2;
+}
+
+
+template <typename T>
+void testRuntimeSpan()
+{
+    T val[2] = {};
+    std::span<T>   s1{val, 2};
+    std::span<T,2> s2{val, 2};
+    assert(s1.data() == &val[0] && s1.size() == 2);
+    assert(s2.data() == &val[0] && s2.size() == 2);
+}
+
+struct A{};
+
+int main ()
+{
+    static_assert(testConstexprSpan<int>(),    "");
+    static_assert(testConstexprSpan<long>(),   "");
+    static_assert(testConstexprSpan<double>(), "");
+    static_assert(testConstexprSpan<A>(),      "");
+
+    testRuntimeSpan<int>();
+    testRuntimeSpan<long>();
+    testRuntimeSpan<double>();
+    testRuntimeSpan<std::string>();
+    testRuntimeSpan<A>();
+
+    checkCV();
+}