[lexer] Implement Hash::new()

lexer/src/states/begin.rs

@@ -19,7 +19,7 @@ impl State for Begin {
             // TODO: Figure out some way to track newlines.
             c if c.is_whitespace() => StateResult::Continue,
             c if c.is_identifier_initial() => StateResult::Advance { to: Box::new(IdSub{}) },
-            c if c.is_hash() => StateResult::Advance { to: Box::new(Hash{}) },
+            c if c.is_hash() => StateResult::Advance { to: Box::new(Hash::new()) },
             _ => {
                 let msg = format!("Invalid character: {}", c);
                 StateResult::Fail { msg }

lexer/src/states/hash.rs

@@ -16,6 +16,10 @@ const FALSE: &'static str = "false";
 #[derive(Debug)] pub struct Hash;
 #[derive(Debug)] pub struct BoolSub(String);
 
+impl Hash {
+    pub fn new() { Hash{} }
+}
+
 impl State for Hash {
     fn lex(&mut self, c: char) -> StateResult {
         match c {