atorstling / bychan Goto Github PK

This library is absolutely a wonderful treasure I've found. Thank you.

The solution might already exist, if that's the case, then I couldn't find it. Perhaps writing a documentation would attract more people using it?

Anyway, Is there a way to elegantly abort evaluation with a runtime error message similar to parser.abort()? For example, divide-by-zero error or arithmetic errors. I just don't want to see a log from Java. Or do I have to extend Repl? In any case, I think it would be a good thing to have a switch on whether or not to dump the whole error log while running Repl.

So no more TokenType

Perhaps a method on parseresult? parsedAllTokens ()

Does it work satisfactory?

I just checked out the minilang example and read through the code. When I saw the StatementNode, I was struggling to find a way to add an ending semicolon for conventional purpose. In your example, the ; is used to separate statements, but there isn't a way to end a script with the last statement ending with a ; because the parser isn't able to parse the end and would result in:

'Premature end reached' @  position ..., current lexeme is END ...

Is there a way to check whether the next token is the END or is what I'm thinking incorrect and looking ahead isn't the right thing to do and that there are other ways?

Such as those with level-1

What happens if you input the empty string to parse?

http://stackoverflow.com/questions/3013669/performing-regex-on-a-stream

Make sure we get nice errors

Do not group all params but group to get (previous, lexeme, parser)

V2 introduces unwanted cross-dependencies.

previous -> left?
bindingpower should be consistently named
infix, suffix -> nud, led?
same infix and suffix iface?

Make an automatic repl with Language.repl().run()

Also check if there are non-registered tokens which are being referred (tokens not belonging to current lang).

Both mem and cpu

Rename "parent" to "scope"? Which type? New type param?