Added print statement, various other fixes

src/lex/symbol.rs

@@ -8,17 +8,19 @@ pub enum Symbol {
 	CloseBrace,
 	OpenParen,
 	CloseParen,
+	Comma,
 }
 
 pub fn parse_symbol(input: &str) -> Option<(Token, &str)> {
 	let c: char = input.chars().next()?;
 	let input = &input[1..];
 	match c {
-		'=' => Some((Token::Sym(Symbol::EqualSign), input)),
-		';' => Some((Token::Sym(Symbol::Semicolon), input)),
-		'{' => Some((Token::Sym(Symbol::OpenBrace), input)),
+		'=' => Some((Token::Sym(Symbol::EqualSign),  input)),
+		';' => Some((Token::Sym(Symbol::Semicolon),  input)),
+		',' => Some((Token::Sym(Symbol::Comma),      input)),
+		'{' => Some((Token::Sym(Symbol::OpenBrace),  input)),
 		'}' => Some((Token::Sym(Symbol::CloseBrace), input)),
-		'(' => Some((Token::Sym(Symbol::OpenParen), input)),
+		'(' => Some((Token::Sym(Symbol::OpenParen),  input)),
 		')' => Some((Token::Sym(Symbol::CloseParen), input)),
 		_ => None
 	}