From 8e761289a2446367267c6c0d9a26e734f0f78306 Mon Sep 17 00:00:00 2001
From: Karen Arutyunov <karen@codesynthesis.com>
Date: Wed, 16 Dec 2020 20:29:05 +0300
Subject: Get rid of legacy build systems and rename cutl/ to libcutl/

---
 libcutl/meta/polymorphic-p.hxx | 49 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)
 create mode 100644 libcutl/meta/polymorphic-p.hxx

(limited to 'libcutl/meta/polymorphic-p.hxx')

diff --git a/libcutl/meta/polymorphic-p.hxx b/libcutl/meta/polymorphic-p.hxx
new file mode 100644
index 0000000..13fb531
--- /dev/null
+++ b/libcutl/meta/polymorphic-p.hxx
@@ -0,0 +1,49 @@
+// file      : libcutl/meta/polymorphic-p.hxx
+// license   : MIT; see accompanying LICENSE file
+
+#ifndef LIBCUTL_META_POLYMORPHIC_HXX
+#define LIBCUTL_META_POLYMORPHIC_HXX
+
+#include <libcutl/meta/class-p.hxx>
+#include <libcutl/meta/remove-cv.hxx>
+
+namespace cutl
+{
+  namespace meta
+  {
+    template <typename CVX>
+    struct polymorphic_p
+    {
+      typedef typename remove_cv<CVX>::r X;
+
+      template <typename Y, bool C>
+      struct impl
+      {
+        static const bool r = false;
+      };
+
+      template <typename Y>
+      struct impl<Y, true>
+      {
+        struct t1: Y
+        {
+          t1 ();
+        };
+
+        struct t2: Y
+        {
+          t2 ();
+
+          virtual
+          ~t2 () noexcept;
+        };
+
+        static const bool r = sizeof (t1) == sizeof (t2);
+      };
+
+      static const bool r = impl<X, class_p<X>::r>::r;
+    };
+  }
+}
+
+#endif // LIBCUTL_META_POLYMORPHIC_HXX
-- 
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