Marc Weber
Excerpts from Ivan Lazar Miljenovic's message of Wed Aug 04 12:37:29 +0200 2010:
functionality in Emacs.
I know - I patched the py backend for scion. I'm talking about:
node.getParent().getParent().<tab>Attributes["value"]
Or (let's talk about a haskell example):
pkgVersion $ package $ packageDescription
It feels unnatural to complete this. How should this be done? I know that you can define your own .dot. operator, so that you can write it in (let's call it Java style):
packageDescription .dot. package .dot. pkgVersion
I don't get the point of this ".dot." operator (which isn't even a valid operator).
Without completion I have to get the type of packageDescription, then follow the structure until I find Version. Using tags and Vim that's fast. Still completion is a lot faster.
Not really following your example here: you want something to write your code for you and read your mind to know what that code should be? My understanding of tab-completion in IDEs for Java, etc. is that it just displayed every single possible class method for a particular object value, and then did some kind of matching based upon what you typed to narrow down the list, not that it was type-based.
I'm not talking about the universal "put everything in scope" completion thing - eg which Vim provides for some languages. I'm talking about really helpful context sensitive completion. I know its pretty hard to get this hard for Haskell - because type is determined by things you use. But the example I gave above is one which could be implemented easily.
How is it easy? How would this mythical completer know which function to use? -- Ivan Lazar Miljenovic Ivan.Miljenovic@gmail.com IvanMiljenovic.wordpress.com