From 1fe44238b1d64f18d9366710f16ae062290d5b0c Mon Sep 17 00:00:00 2001
From: Jordan Woyak <jordan.woyak@gmail.com>
Date: Sun, 20 Oct 2019 09:51:19 -0500
Subject: ExpressionParser: Add XOR operator.

---
 .../InputCommon/ControlReference/ExpressionParser.cpp    | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

(limited to 'Source/Core/InputCommon/ControlReference/ExpressionParser.cpp')

diff --git a/Source/Core/InputCommon/ControlReference/ExpressionParser.cpp b/Source/Core/InputCommon/ControlReference/ExpressionParser.cpp
index 00afc5e036..8e9b154bf7 100644
--- a/Source/Core/InputCommon/ControlReference/ExpressionParser.cpp
+++ b/Source/Core/InputCommon/ControlReference/ExpressionParser.cpp
@@ -136,6 +136,8 @@ Token Lexer::NextToken()
     return Token(TOK_GTHAN);
   case ',':
     return Token(TOK_COMMA);
+  case '^':
+    return Token(TOK_XOR);
   case '\'':
     return GetDelimitedLiteral();
   case '$':
@@ -278,6 +280,12 @@ public:
       lhs->GetValue();
       return rhs->GetValue();
     }
+    case TOK_XOR:
+    {
+      const auto lval = lhs->GetValue();
+      const auto rval = rhs->GetValue();
+      return std::max(std::min(1 - lval, rval), std::min(lval, 1 - rval));
+    }
     default:
       assert(false);
       return 0;
@@ -621,12 +629,14 @@ private:
       return 3;
     case TOK_AND:
       return 4;
-    case TOK_OR:
+    case TOK_XOR:
       return 5;
-    case TOK_ASSIGN:
+    case TOK_OR:
       return 6;
-    case TOK_COMMA:
+    case TOK_ASSIGN:
       return 7;
+    case TOK_COMMA:
+      return 8;
     default:
       assert(false);
       return 0;
-- 
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