ircd::util: Add template typedef convenience for std::pair.

include/ircd/util/pair.h

@@ -0,0 +1,22 @@
+// The Construct
+//
+// Copyright (C) The Construct Developers, Authors & Contributors
+// Copyright (C) 2016-2020 Jason Volk <jason@zemos.net>
+//
+// Permission to use, copy, modify, and/or distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice is present in all copies. The
+// full license for this software is available in the LICENSE file.
+
+#pragma once
+#define HAVE_IRCD_UTIL_PAIR_H
+
+namespace ircd {
+inline namespace util
+{
+	/// Simple gimmick to allow shorter declarations when both elements
+	/// of a pair are the same.
+	template<class A,
+	         class B = A>
+	using pair = std::pair<A, B>;
+}}

include/ircd/util/util.h

@@ -32,6 +32,7 @@ namespace ircd
 
 #include "typography.h"
 #include "identity.h"
+#include "pair.h"
 #include "unit_literal.h"
 #include "construction.h"
 #include "unwind.h"