[Ecls-list] Overwriting cl functions

[Peter Enerccio]

Well I tried the shadowing import, compiles fine, but when attempting to
load that fas, it will throw redefinition error

(defpackage :test)

(in-package :test)

(shadowing-import 'open)
(defun open (filespec &key direction element-type if-exists
if-does-not-exist
            external-format)
  (print "test")
  (cl::open filespec :direction direction :element-type element-type
        :if-exists if-exists :if-does-not-exist if-does-not-exist
        :external-format external-format))



2013/1/29 Juan Jose Garcia-Ripoll <juanjose.garciaripoll at gmail.com>

> On Tue, Jan 29, 2013 at 5:30 PM, Juan Jose Garcia-Ripoll <
> juanjose.garciaripoll at gmail.com> wrote:
>
>>
>> On Tue, Jan 29, 2013 at 3:28 PM, Peter Enerccio <enerccio at gmail.com>wrote:
>>
>>> Basically, I want to overwrite open function to return my specific
>>> (gray) stream. instead of usual stream that it would.
>>> Ideally, all functions/macros that use open should use that function
>>> instead, but I am not sure if it is possible.
>>
>>
>> This is the only instance where ECL contemplates redefinition. Use
>> (gray::redefine-cl-functions)
>>
>
> Sorry, I misread again: you want _your_ own OPEN function. In this case
> why don't you shadow OPEN in your application and force it to return gray
> streams? All packages in your application will see the shadowed symbol.
>
> The other alternative, redefining OPEN, only works if you tell the
> compiler not to inline OPEN with a global (proclaim '(notinline open)), for
> otherwise it will use the C function in the generated code.
>
> Juanjo
>
>
> --
> Instituto de Física Fundamental, CSIC
> c/ Serrano, 113b, Madrid 28006 (Spain)
> http://juanjose.garciaripoll.googlepages.com
>



-- 
Bc. Peter Vaňušanik
http://www.bishojo.tk
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