From 0d36ba4a52c7b34a6502b3e5a202be94dda818f5 Mon Sep 17 00:00:00 2001
From: Brandon Dyck <brandon@dyck.us>
Date: Thu, 8 Jun 2023 08:00:26 -0600
Subject: [PATCH] Fix number parsing and add ++ operator

---
 Program.cs | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/Program.cs b/Program.cs
index 5e41e2d..5c65f8a 100644
--- a/Program.cs
+++ b/Program.cs
@@ -83,6 +83,7 @@ enum TokenType
 	Period,
 	Equal,
 	Plus, Minus, Asterisk, Slash,
+	PlusPlus,
 	DoubleEqual,
 	Bang, BangEqual,
 	LessEqual, GreaterEqual,
@@ -238,8 +239,11 @@ class Scanner
 		// Look for a fractional part.
 		if (peek() == '.' && isDigitOrSeparator(peekNext() ?? '\0'))
 		{
+			match('.');
 			while (match(isDigitOrSeparator)) ;
 		}
+		double value = Double.Parse(source.Substring(start, current - start));
+		addToken(TokenType.Number, value);
 	}
 
 	private bool isIdentifierStartChar(char c)
@@ -277,7 +281,6 @@ class Scanner
 			case '`': addToken(TokenType.Backtick); break;
 			case ',': addToken(TokenType.Comma); break;
 			case '.': addToken(TokenType.Period); break;
-			case '+': addToken(TokenType.Plus); break;
 			case '*': addToken(TokenType.Asterisk); break;
 			case '/': addToken(TokenType.Slash); break;
 			case '-':
@@ -286,6 +289,9 @@ class Scanner
 			case '!':
 				addToken(match('=') ? TokenType.BangEqual : TokenType.Bang);
 				break;
+			case '+':
+				addToken(match('+') ? TokenType.PlusPlus : TokenType.Plus);
+				break;
 			case '=':
 				addToken(match('=') ? TokenType.DoubleEqual :
 					match('>') ? TokenType.DoubleArrow :