From 1bd8c0bb05d17ad6453822bb34fa48661c900809 Mon Sep 17 00:00:00 2001
From: Alexander Luzgarev <mahalex@gmail.com>
Date: Sat, 7 Apr 2018 12:37:32 +0200
Subject: [PATCH] Function outputs list can be empty

---
 Parser.Tests/MParserShould.cs | 13 +++++++++++++
 Parser/MParser.cs             |  3 +--
 2 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/Parser.Tests/MParserShould.cs b/Parser.Tests/MParserShould.cs
index b591791..bec08e8 100644
--- a/Parser.Tests/MParserShould.cs
+++ b/Parser.Tests/MParserShould.cs
@@ -478,5 +478,18 @@ namespace Parser.Tests
             Assert.IsInstanceOf<FunctionCallExpressionNode>(e.BaseClassNameAndArguments);
             Assert.AreEqual(text, actual.FullText);
         }
+
+        [Test]
+        public void ParseFunctionWithEmptyOutputsList()
+        {
+            var text = "function [] = a(b) end";
+            var sut = CreateParser(text);
+            var actual = sut.ParseStatement();
+            Assert.IsInstanceOf<FunctionDeclarationNode>(actual);
+            var f = (FunctionDeclarationNode) actual;
+            Assert.AreEqual(0, f.OutputDescription.Outputs.Count);
+            Assert.AreEqual(text, actual.FullText);            
+
+        }
     }
 }
\ No newline at end of file
diff --git a/Parser/MParser.cs b/Parser/MParser.cs
index f5bc167..30a7195 100644
--- a/Parser/MParser.cs
+++ b/Parser/MParser.cs
@@ -128,10 +128,9 @@ namespace Parser
         private List<SyntaxNode> ParseFunctionOutputList()
         {
             var outputs = new List<Token>();
-            outputs.Add(EatToken(TokenKind.Identifier));
             while (CurrentToken.Kind != TokenKind.ClosingSquareBracket)
             {
-                if (CurrentToken.Kind == TokenKind.Comma)
+                if (outputs.Count > 0 && CurrentToken.Kind == TokenKind.Comma)
                 {
                     outputs.Add(EatToken());
                 }