Re: Is intellisense features integration in Emacs technically possible?

["Andreas Röhler" <andreas.roehler@online.de>]

Am 22.01.2014 19:49, schrieb Jorgen Schaefer:
> On Wed, 22 Jan 2014 17:29:15 +0000
> phillip.lord@newcastle.ac.uk (Phillip Lord) wrote:
>
>> Eli Zaretskii <eliz@gnu.org> writes:
>>>> A better way is to build on the hard work of other and interface
>>>> emacs with an external tool.
>>>
>>> Personally, I think implementing such features via external programs
>>> is a terrible design.  It will never be smooth and responsive
>>> enough, and on top of that you'd need to track development of those
>>> other tools.  And what if they become abandoned some day?
>>
>> I think that it depends on the language. Introspecting over, for
>> example, Java would require an awful of elisp, which would be
>> difficult to write. Getting Java to do this work is quite a lot less
>> effort. Hence, the JDEEs use of Java for this (via bsh). Likewise,
>> Clojure and Scala both of which use their own language to do much of
>> the work. Or for that matter, common lisp with slime/swank. Or even,
>> for that matter, English with aspell. I didn't have a problem with
>> responsiveness with any of these.
>

[ ... ]
>
> The biggest problems are outside of Emacs. Good libraries that provide
> intelligent completion and code introspection are rare. I know of three
> for Python, one of which is not maintained anymore, one was mostly-dead
> for a few years, and all of which have different deficiencies. They
> also have trouble keeping up with the development of the language. I
> expect similar problems for other languages. Reimplementing these
> libraries in Emacs Lisp will just cause more problems keeping them
> up-to-date.
>

Good point(s).
An aspect not seeing mentioned so far: Python for example will cancel all service when encountering a syntax-error.
A case where a decent support from Emacs Lips side will be helpful.
Seems wise to implement some basic stuff in Emacs Lisp, while accessing the languages resources if available.