From d5d1138607d25b2be15d337b40ff07d8d4e24684 Mon Sep 17 00:00:00 2001
From: otya128 <otya128@users.noreply.github.com>
Date: Tue, 6 Dec 2016 19:23:10 +0900
Subject: [PATCH] Support function OUT (no argument)

---
 SMILEBASIC/parser.d | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/SMILEBASIC/parser.d b/SMILEBASIC/parser.d
index b363dda..1fbb505 100644
--- a/SMILEBASIC/parser.d
+++ b/SMILEBASIC/parser.d
@@ -908,12 +908,18 @@ class Parser
                     if(lex.front().type == TokenType.Out)
                     {
                         lex.popFront();
+                        token = lex.front();
                         while(true)
                         {
                             token = lex.front();
                             Expression arg = expression();
                             if(!isLValue(arg))
                             {
+                                //to support func args... OUT (no argument)
+                                if (!func.outVariable.length)
+                                {
+                                    break;
+                                }
                                 syntaxError();
                                 return null;
                             }
@@ -1060,6 +1066,10 @@ class Parser
     //左辺値か
     bool isLValue(Expression expr)
     {
+        if (!expr)
+        {
+            return false;
+        }
         if(expr.type == NodeType.Variable)
         {
             return true;