From 2f8c2956754afa558dc1dd719c7aa24c64bcf23c Mon Sep 17 00:00:00 2001
From: Deukhoofd <Deukhoofd@gmail.com>
Date: Tue, 20 Nov 2018 14:23:50 +0100
Subject: [PATCH] Allow identifiers to start with an underscore

---
 Upsilon/Parser/Lexer.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Upsilon/Parser/Lexer.cs b/Upsilon/Parser/Lexer.cs
index d8b62d0..c2edbd6 100644
--- a/Upsilon/Parser/Lexer.cs
+++ b/Upsilon/Parser/Lexer.cs
@@ -95,7 +95,7 @@ namespace Upsilon.Parser
                     }
                     return new SyntaxToken(SyntaxKind.Tilde, _position, "~", null);
                 default:
-                    if (char.IsLetter(Current))
+                    if (char.IsLetter(Current) || Current == '_')
                         return LexIdentifierOrKeyword();
                     _diagnostics.LogBadCharacter(new TextSpan(_position, 1), SyntaxKind.Identifier);
                     return new SyntaxToken(SyntaxKind.BadToken, _position, "", null);