From 77b8c4dd5274e0c7eea4bae243c36fc8bb04692c Mon Sep 17 00:00:00 2001
From: Luiz Henrique Laurini <luizhenriquelaurini@gmail.com>
Date: Thu, 24 Feb 2022 19:28:45 +0100
Subject: [PATCH] Fix undeclared identifier error with Lua 5.4+

The LUA_ERRGCMM constant has been removed.
See: https://www.lua.org/manual/5.4/manual.html#8.3
---
 Source/Registry/LuaCompiler.cpp     | 2 ++
 Source/UnitTest/TestLuaCompiler.cpp | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/Source/Registry/LuaCompiler.cpp b/Source/Registry/LuaCompiler.cpp
index ca4223b..2c88b92 100644
--- a/Source/Registry/LuaCompiler.cpp
+++ b/Source/Registry/LuaCompiler.cpp
@@ -36,9 +36,11 @@ void inline _checkErrorAndThrow(LuaState &L, int error) {
 			case LUA_ERRMEM:
 				throw std::runtime_error("Out of memory");
 				break;
+#if LUA_VERSION_NUM < 504
 			case LUA_ERRGCMM:
 				throw std::out_of_range("GC Error while loading");
 				break;
+#endif
 			case LUA_ERRSYNTAX:
 				throw std::logic_error(lua_tostring(L,1));
 				break;
diff --git a/Source/UnitTest/TestLuaCompiler.cpp b/Source/UnitTest/TestLuaCompiler.cpp
index 7e5a598..fc40c8d 100644
--- a/Source/UnitTest/TestLuaCompiler.cpp
+++ b/Source/UnitTest/TestLuaCompiler.cpp
@@ -75,7 +75,9 @@ namespace LuaCpp {
 		EXPECT_NO_THROW(_checkErrorAndThrow(*L, LUA_OK));
 		EXPECT_THROW(_checkErrorAndThrow(*L, LUA_ERRMEM), std::runtime_error);
 		lua_pushstring(*L, "some error");
+#if LUA_VERSION_NUM < 504
 		EXPECT_THROW(_checkErrorAndThrow(*L, LUA_ERRGCMM), std::out_of_range);
+#endif
 		EXPECT_THROW(_checkErrorAndThrow(*L, LUA_ERRSYNTAX), std::logic_error);
 
 		EXPECT_THROW(_checkErrorAndThrow(*L, 9999), std::runtime_error);