From aa9de65befbb67cf6017092f79e5037aee56122f Mon Sep 17 00:00:00 2001
From: Martin Moene <martin.moene@gmail.com>
Date: Mon, 20 May 2024 15:49:30 +0200
Subject: [PATCH] Add empty nsrs_REQUIRES_0(), nsrs_REQUIRES_T() for pre-C++11
 (#33, thanks @Crzyrndm)

---
 include/nonstd/ring_span.hpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/nonstd/ring_span.hpp b/include/nonstd/ring_span.hpp
index 2e4ea88..aa1b0d5 100644
--- a/include/nonstd/ring_span.hpp
+++ b/include/nonstd/ring_span.hpp
@@ -270,6 +270,11 @@ nsrs_DISABLE_MSVC_WARNINGS( 4345 26439 26440 26472 26473 26481 26490 )
 #define nsrs_REQUIRES_T(...) \
     , typename std::enable_if< (__VA_ARGS__), int >::type = 0
 
+#else
+
+#define nsrs_REQUIRES_0(...)  /*empty*/
+#define nsrs_REQUIRES_T(...)  /*empty*/
+
 #endif
 
 // includes: