From c1616b032e9597b072de6fae634ef242a6a67b1d Mon Sep 17 00:00:00 2001
From: Simon Rozman <simon@rozman.si>
Date: Thu, 25 Apr 2024 15:16:12 +0200
Subject: [PATCH] mapping: add invert()

Signed-off-by: Simon Rozman <simon@rozman.si>
---
 include/stdex/mapping.hpp | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/include/stdex/mapping.hpp b/include/stdex/mapping.hpp
index 6f13cfca7..0c6cb18b7 100644
--- a/include/stdex/mapping.hpp
+++ b/include/stdex/mapping.hpp
@@ -68,6 +68,16 @@ namespace stdex
 		{
 			return mapping(from + other.from, to + other.to);
 		}
+
+		///
+		/// Reverses source and destination indexes
+		///
+		void invert()
+		{
+			T tmp = from;
+			from = to;
+			to = tmp;
+		}
 	};
 
 	template <class T, class AX = std::allocator<mapping<T>>>