Update todo

todo.md

@@ -1,32 +1,21 @@
 TODO
 ====
 
-# flexibility of lexer
-- make separator character set configurable, not hard-coded to whitespace
-- add special lexical behavior for indentation-aware languages
-- add helpers for constructing rules involving infix, prefix, and postfix operators
-
-# validation / robustness of compiler
-make the main `compile` function return errors when grammars are invalid
-- check validity of regex patterns
-- check that all rules that are referenced are also defined
-- check that all rules that are defined are also referenced (except the start rule)
-- don't require user to use the `err` helper
-  (right now, generated code doesn't compile if there are no error productions)
-
-# compiler optimization
-- implement Pager's [Practical general method](http://link.springer.com/article/10.1007%2FBF00290336)
+* Complete javascript and golang grammars
+* Add `token` helper that allows user to specify structure of tokens using
+  rules other than strings and patterns
+* Allow language keywords to be specified inline, not as separate named rules.
+* Make separator character set configurable, not hard-coded to whitespace
+* Add special lexical behavior for indentation-aware languages
+* Return a useful error when grammar contains invalid regex patterns
+* Create working parser when grammar contains no error productions
+* Create working parser when grammar contains unused symbols
+* Implement Pager's [Practical general method](http://link.springer.com/article/10.1007%2FBF00290336)
   for reducing the size of the LR(1) parse table
-- speed up grammar compilation
-
-# incremental parsing
-- implement the remainder of the incremental parsing algorithm: reuse parse
+* Speed up grammar compilation
+* Implement the remainder of the incremental parsing algorithm: reuse parse
   tree after the edit
-
-# node.js wrapper
-- create easy way to publish grammars as npm packages
-- add simple selector engine for trees
-
-# chores
-- make ordering of parse and lex tables deterministic, so that generated
+* Create easy way to publish grammars as npm packages
+* Add simple selector engine for syntax trees
+* Make ordering of parse and lex tables deterministic, so that generated
   code doesn't keep changing on every commit