More concision in parser

src/parser.rs

@@ -119,7 +119,6 @@ macro_rules! expect_identifier {
     }
 }
 
-
 fn is_delimiter(token: &Token) -> bool {
     use tokenizer::Token::*;
     match *token {
@@ -179,9 +178,7 @@ impl Parser {
     fn identlist(&mut self) -> ParseResult<Vec<String>> {
         use tokenizer::Token::*;
         let mut args: Vec<String> = Vec::new();
-        loop {
-            match self.peek() {
-                Some(Identifier(name)) => {
+        while let Some(Identifier(name)) = self.peek() {
             args.push(name);
             self.next();
             if let Some(Comma) = self.peek() {
@@ -189,12 +186,7 @@ impl Parser {
             } else {
                 break;
             }
-                },
-
-                _ => break
         }
-        }
-
         Ok(args)
     }