From 6cd243def4b335efa5a83acb4d29aee482970d2e Mon Sep 17 00:00:00 2001
From: "Taylor C. Richberger" <taywee@gmx.com>
Date: Sat, 2 Mar 2019 14:26:54 -0700
Subject: turn ptrdiff_t into std::ptrdiff_t

---
 args.hxx | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/args.hxx b/args.hxx
index d7b3ca9..09c1919 100644
--- a/args.hxx
+++ b/args.hxx
@@ -40,6 +40,7 @@
 #include <unordered_map>
 #include <unordered_set>
 #include <type_traits>
+#include <cstddef>
 
 #ifdef ARGS_TESTNAMESPACE
 namespace argstest
@@ -2719,7 +2720,7 @@ namespace args
                                 {
                                     curArgs[idx - 1] += "=";
                                     // Avoid warnings from -Wsign-conversion
-                                    const auto signedIdx = static_cast<ptrdiff_t>(idx);
+                                    const auto signedIdx = static_cast<std::ptrdiff_t>(idx);
                                     if (idx + 1 < curArgs.size())
                                     {
                                         curArgs[idx - 1] += curArgs[idx + 1];
-- 
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