[plt-dev] I am not using .rkt files yet...

From: Carl Eastlund (cce at ccs.neu.edu)
Date: Mon Apr 12 15:59:27 EDT 2010

I would really like to hear Matthew chime in on why we can't get
precise source locations with the appropriate extension.  This message
clearly comes up after the path has been resolved and a concrete file
has been found.  Adding ".rkt" is inaccurate and using ".*" is
imprecise.  What if someone has both a ".rkt" and a ".ss" file there?
I don't know of any other language that refuses to give out accurate
file extensions in error messages; this seems like a serious problem
to me.

Carl Eastlund

On Mon, Apr 12, 2010 at 3:56 PM, Matthias Felleisen
<matthias at ccs.neu.edu> wrote:
> Perhaps the easiest solution to get accurate error messages is to
> NOT add an extension at all. This would report the error in terms
> of the code that's written down and probably makes it easiest to
> locate. DrScheme opens the correct file presumably -- Matthias
> On Apr 12, 2010, at 3:51 PM, Robby Findler wrote:
>> IIUC, .rkt is the default extension for module paths like (require
>> planet/..../drscheme/dracula-state), ie those that do not have quotes.
>> Then there is some magic munging that goes on whereby a .ss file in
>> the place where a .rkt file is expected happens. I recall that
>> Matthew, Matthias, Eli and I had a long discussion on the best way to
>> accommodate such paths and this seems to be the best option. Matthew
>> probably remembers more, since he seems to have implemented it
>> recently.
>> Robby
>> On Mon, Apr 12, 2010 at 2:43 PM, Carl Eastlund <cce at ccs.neu.edu> wrote:
>>> ...but I am already getting error messages in terms of them:
>>> /Users/cce/svn/2010-04-12/research/planet/dracula/drscheme/dracula-state.rkt:
>>>  (file
>>>  /Users/cce/svn/2010-04-12/research/planet/dracula/drscheme/dracula-proof-panel.rkt)
>>>  broke the contract
>>>  (->
>>>  (and/c
>>>   dracula-state-active?
>>>   (not/c dracula-state-error?))
>>>  (and/c
>>>   dracula-state?
>>>   (not/c dracula-state-active?))) on dracula-state-done; expected
>>> <(and/c dracula-state-active? (not/c dracula-state-error?))>, given:
>>> #s(dracula-state #f #s(proof-table (Dracula) Dracula #hasheq((Dracula
>>> . #s(proof-state #s(loc unsaved-editor1185 0 204) 5 #f #hash((0 .
>>> #s(term-state #s(loc unsaved-editor1185 0 0) #f #f #f)) (1 .
>>> #s(term-state #s(loc unsaved-editor1185 1 57) (include-b...
>>> This is incorrect, and for errors in someone else's code it would be
>>> really confusing.  Error messages should not direct me to nonexistent
>>> files.  Those things should have ".ss" extensions.
>>> Carl Eastlund
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