From 97ee5c88deac4f48bd88525e678abc188663c9b2 Mon Sep 17 00:00:00 2001
From: John Kessenich <cepheus@frii.com>
Date: Thu, 30 Apr 2020 01:56:38 -0600
Subject: [PATCH] Fix #2201: Improve const and copy constructor for
 TVarLivePair.

---
 glslang/MachineIndependent/iomapper.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/glslang/MachineIndependent/iomapper.h b/glslang/MachineIndependent/iomapper.h
index 13a8932b9..e91a15094 100644
--- a/glslang/MachineIndependent/iomapper.h
+++ b/glslang/MachineIndependent/iomapper.h
@@ -238,12 +238,13 @@ typedef std::map<TString, TVarEntryInfo> TVarLiveMap;
 // In the future, if the vc++ compiler can handle such a situation,
 // this part of the code will be removed.
 struct TVarLivePair : std::pair<const TString, TVarEntryInfo> {
-    TVarLivePair(std::pair<const TString, TVarEntryInfo>& _Right) : pair(_Right.first, _Right.second) {}
+    TVarLivePair(const std::pair<const TString, TVarEntryInfo>& _Right) : pair(_Right.first, _Right.second) {}
     TVarLivePair& operator=(const TVarLivePair& _Right) {
         const_cast<TString&>(first) = _Right.first;
         second = _Right.second;
         return (*this);
     }
+    TVarLivePair(const TVarLivePair& src) { *this = src; }
 };
 typedef std::vector<TVarLivePair> TVarLiveVector;