Lex hashes and booleans

src/lexer/char.rs

@@ -10,6 +10,8 @@ pub trait Lexable {
     fn is_identifier_initial(&self) -> bool;
     fn is_identifier_subsequent(&self) -> bool;
     fn is_identifier_single(&self) -> bool;
+    fn is_hash(&self) -> bool;
+    fn is_boolean(&self) -> bool;
     fn is_newline(&self) -> bool;
 }
 
@@ -34,6 +36,14 @@ impl Lexable for char {
         charset::identifier_singles().contains(&self)
     }
 
+    fn is_hash(&self) -> bool {
+        *self == '#'
+    }
+
+    fn is_boolean(&self) -> bool {
+        *self == 't' || *self == 'f'
+    }
+
     fn is_newline(&self) -> bool {
         *self == '\n'
     }