From 6e2398b5249893fb845fb57b06e729bb7a1b70ad Mon Sep 17 00:00:00 2001
From: Farwaykorse <r-j.wolthuis@live.com>
Date: Thu, 9 Apr 2020 03:15:57 +0200
Subject: [PATCH] Solve MSVC warning C4668: __GNUC__ & __clang__ not defined as
 a preprocessor macro

MSVC compiler warning C4668:
` '__clang__' is not defined as a preprocessor macro, replacing with '0' for '#if/#elif'`
---
 include/gsl/multi_span | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/gsl/multi_span b/include/gsl/multi_span
index 3a2d982..779f6e9 100644
--- a/include/gsl/multi_span
+++ b/include/gsl/multi_span
@@ -57,7 +57,7 @@
 #endif // _MSC_VER < 1910
 #endif // _MSC_VER
 
-#if __clang__ || __GNUC__
+#if defined(__GNUC__) || defined(__clang__)
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wdeprecated-declarations"
 #endif
@@ -2266,7 +2266,7 @@ general_span_iterator<Span> operator+(typename general_span_iterator<Span>::diff
 #pragma GCC diagnostic pop
 #endif // __GNUC__ > 6
 
-#if __clang__ || __GNUC__
+#if defined(__GNUC__) || defined(__clang__)
 #pragma GCC diagnostic pop
 #endif