1 files changed, 100 insertions, 0 deletions
diff --git a/test/std/numerics/rand/rand.util/rand.util.canonical/generate_canonical.pass.cpp b/test/std/numerics/rand/rand.util/rand.util.canonical/generate_canonical.pass.cpp
new file mode 100644
index 000000000000..7433e28e4935
--- /dev/null
+++ b/test/std/numerics/rand/rand.util/rand.util.canonical/generate_canonical.pass.cpp
@@ -0,0 +1,100 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+// <random>
+
+// template<class RealType, size_t bits, class URNG>
+//     RealType generate_canonical(URNG& g);
+
+#include <random>
+#include <cassert>
+
+int main()
+{
+    {
+        typedef std::minstd_rand0 E;
+        typedef float F;
+        E r;
+        F f = std::generate_canonical<F, 0>(r);
+        assert(f == (16807 - E::min()) / (E::max() - E::min() + F(1)));
+    }
+    {
+        typedef std::minstd_rand0 E;
+        typedef float F;
+        E r;
+        F f = std::generate_canonical<F, 1>(r);
+        assert(f == (16807 - E::min()) / (E::max() - E::min() + F(1)));
+    }
+    {
+        typedef std::minstd_rand0 E;
+        typedef float F;
+        E r;
+        F f = std::generate_canonical<F, std::numeric_limits<F>::digits - 1>(r);
+        assert(f == (16807 - E::min()) / (E::max() - E::min() + F(1)));
+    }
+    {
+        typedef std::minstd_rand0 E;
+        typedef float F;
+        E r;
+        F f = std::generate_canonical<F, std::numeric_limits<F>::digits>(r);
+        assert(f == (16807 - E::min()) / (E::max() - E::min() + F(1)));
+    }
+    {
+        typedef std::minstd_rand0 E;
+        typedef float F;
+        E r;
+        F f = std::generate_canonical<F, std::numeric_limits<F>::digits + 1>(r);
+        assert(f == (16807 - E::min()) / (E::max() - E::min() + F(1)));
+    }
+
+    {
+        typedef std::minstd_rand0 E;
+        typedef double F;
+        E r;
+        F f = std::generate_canonical<F, 0>(r);
+        assert(f == (16807 - E::min()) / (E::max() - E::min() + F(1)));
+    }
+    {
+        typedef std::minstd_rand0 E;
+        typedef double F;
+        E r;
+        F f = std::generate_canonical<F, 1>(r);
+        assert(f == (16807 - E::min()) / (E::max() - E::min() + F(1)));
+    }
+    {
+        typedef std::minstd_rand0 E;
+        typedef double F;
+        E r;
+        F f = std::generate_canonical<F, std::numeric_limits<F>::digits - 1>(r);
+        assert(f ==
+            (16807 - E::min() +
+            (282475249 - E::min()) * (E::max() - E::min() + F(1))) /
+            ((E::max() - E::min() + F(1)) * (E::max() - E::min() + F(1))));
+    }
+    {
+        typedef std::minstd_rand0 E;
+        typedef double F;
+        E r;
+        F f = std::generate_canonical<F, std::numeric_limits<F>::digits>(r);
+        assert(f ==
+            (16807 - E::min() +
+            (282475249 - E::min()) * (E::max() - E::min() + F(1))) /
+            ((E::max() - E::min() + F(1)) * (E::max() - E::min() + F(1))));
+    }
+    {
+        typedef std::minstd_rand0 E;
+        typedef double F;
+        E r;
+        F f = std::generate_canonical<F, std::numeric_limits<F>::digits + 1>(r);
+        assert(f ==
+            (16807 - E::min() +
+            (282475249 - E::min()) * (E::max() - E::min() + F(1))) /
+            ((E::max() - E::min() + F(1)) * (E::max() - E::min() + F(1))));
+    }
+}