Merge branch 'decay'

fit/decay.h

@@ -0,0 +1,54 @@
+/*=============================================================================
+    Copyright (c) 2015 Paul Fultz II
+    decay.h
+    Distributed under the Boost Software License, Version 1.0. (See accompanying
+    file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+==============================================================================*/
+
+#ifndef FIT_GUARD_DECAY_H
+#define FIT_GUARD_DECAY_H
+
+/// decay
+/// =====
+/// 
+/// Description
+/// -----------
+/// 
+/// The `decay` function is a unary function object that returns whats given to it after decaying its type.
+/// 
+/// Synopsis
+/// --------
+/// 
+///     struct
+///     {
+///         template<class T>
+///         constexpr typename decay<T>::type operator()(T&& x) const
+///         {
+///             return fit::forward<T>(x);
+///         }
+///     } decay;
+/// 
+
+#include <fit/detail/unwrap.h>
+#include <fit/detail/static_const_var.h>
+#include <fit/detail/forward.h>
+
+namespace fit { namespace detail {
+
+struct decay_f
+{
+    template<class T>
+    constexpr typename unwrap_reference<typename std::decay<T>::type>::type 
+    operator()(T&& x) const
+    {
+        return fit::forward<T>(x);
+    }
+};
+
+}
+
+FIT_DECLARE_STATIC_VAR(decay, detail::decay_f);
+
+}
+
+#endif

fit/pack.h

@@ -62,6 +62,7 @@
 #include <fit/detail/static_const_var.h>
 #include <fit/returns.h>
 #include <fit/alias.h>
+#include <fit/decay.h>
 
 #ifndef FIT_HAS_RVALUE_THIS
 #define FIT_HAS_RVALUE_THIS 1
@@ -77,17 +78,6 @@
 
 namespace fit { namespace detail {
 
-struct decay_elem_f
-{
-    template<class T>
-    constexpr typename unwrap_reference<typename std::decay<T>::type>::type 
-    operator()(T&& x) const
-    {
-        return fit::forward<T>(x);
-    }
-};
-static decay_elem_f decay_elem = {};
-
 template<class...>
 struct pack_tag
 {};
@@ -289,7 +279,7 @@ struct pack_decay_f
     template<class... Ts>
     constexpr auto operator()(Ts&&... xs) const FIT_RETURNS
     (
-        pack_f()(decay_elem(fit::forward<Ts>(xs))...)
+        pack_f()(decay(fit::forward<Ts>(xs))...)
     );
 };
 

mkdocs.yml

@@ -42,6 +42,7 @@ pages:
     - 'always': 'always.md'
     - 'args': 'args.md'
     - 'construct': 'construct.md'
+    - 'decay': 'decay.md'
     - 'identity': 'identity.md'
     - 'placeholders': 'placeholders.md'
 - Utilities: