From c341bc0d3c127cc0a03c2130b1c2ab2e01071a07 Mon Sep 17 00:00:00 2001
From: FishyClockwork <fcwgit@hotmail.com>
Date: Sat, 29 Oct 2016 15:52:29 +0200
Subject: [PATCH] Added restriction of Require/Exclude to ZSDF

Added restriction of Require/Exclude to ZSDF (namespace = "ZDoom";).
A warning will be printed if a Require/Exclude block is detected in USDF (namespace = "Strife";).
---
 src/p_usdf.cpp | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/src/p_usdf.cpp b/src/p_usdf.cpp
index 245240273..e8ce5ca50 100644
--- a/src/p_usdf.cpp
+++ b/src/p_usdf.cpp
@@ -210,9 +210,17 @@ class USDFParser : public UDMFParserBase
 			{
 				switch(key)
 				{
-				case NAME_Cost:
 				case NAME_Require:
 				case NAME_Exclude:
+					// Print a warning if the namespace is not ZDoom otherwise fall-through. [FishyClockwork]
+					if (namespace_bits != Zd)
+					{
+						sc.ScriptMessage("Detected \"%s\" block, ignoring. Require/Exclude are exclusive to namespace ZDoom.", key == NAME_Require ? "Require" : "Exclude");
+						while (!sc.CheckToken('}')) sc.MustGetAnyToken(); // Skip this block
+						break;
+					}
+
+				case NAME_Cost:
 					ParseCostRequireExclude(reply, key);
 					break;