From 0995df197ee613136ae0285a4fcba8315a011245 Mon Sep 17 00:00:00 2001
From: Alexander Luzgarev <mahalex@gmail.com>
Date: Tue, 3 Apr 2018 19:40:04 +0200
Subject: [PATCH] Parse unary question mark operator

---
 Lexer/PureTokenFactory.cs | 2 +-
 Lexer/TokenKind.cs        | 1 +
 Parser/MParser.cs         | 3 +++
 3 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/Lexer/PureTokenFactory.cs b/Lexer/PureTokenFactory.cs
index a3a998e..82e8fd4 100644
--- a/Lexer/PureTokenFactory.cs
+++ b/Lexer/PureTokenFactory.cs
@@ -58,7 +58,7 @@
             "+", // UnaryPlus = 57,
             "-", // UnaryMinus = 58,
             "~", // UnaryNot = 59,
-
+            "?", // UnaryQuestionMark = 60,
         };
         
         public PureToken CreatePunctuation(TokenKind kind)
diff --git a/Lexer/TokenKind.cs b/Lexer/TokenKind.cs
index d67a3c5..ea77db8 100644
--- a/Lexer/TokenKind.cs
+++ b/Lexer/TokenKind.cs
@@ -50,5 +50,6 @@
         UnaryPlus = 57,
         UnaryMinus = 58,
         UnaryNot = 59,
+        UnaryQuestionMark = 60,
     }
 }
\ No newline at end of file
diff --git a/Parser/MParser.cs b/Parser/MParser.cs
index 5293c1f..a9fb988 100644
--- a/Parser/MParser.cs
+++ b/Parser/MParser.cs
@@ -495,6 +495,7 @@ namespace Parser
                 case TokenKind.Plus:
                 case TokenKind.Minus:
                 case TokenKind.Not:
+                case TokenKind.QuestionMark:
                     return true;
                 default:
                     return false;
@@ -549,6 +550,8 @@ namespace Parser
                     return TokenKind.UnaryMinus;
                 case TokenKind.Not:
                     return TokenKind.UnaryNot;
+                case TokenKind.QuestionMark:
+                    return TokenKind.UnaryQuestionMark;
                 default:
                     throw new ArgumentException(nameof(kind));
             }