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Re: Treating an object as a structure [message #65425 is a reply to message #65424]

Wed, 04 March 2009 13:59

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

llo writes:

> It works but the problem is that the struct is not the object itself.

No, that's pretty much the point of objects. :-)

> Doing aa=create_struct(name=obj_class(obj)) creates a struct with the
> same fields as object attributes but all of these attributes are not
> uninitialized.

The point of objects is to *encapsulate* the data.
In other words, keep it hidden from prying eyes.
Perhaps it is not an object you want. Can you do
what you want to do in front of God and all people
with a structure? If so, I'd say use that.

I realize you don't want to write a method, but how
about something simple like this:

pro object::help
struct = Create_Struct(NAME=obj_class(self))
tags = Tag_Names(struct)
for j=0,n_elements(tags)-1 do begin
Help, self.(j), Output=out
print, tags[j] + ' : ' + StrMid(out, 13)
endfor
end

function object::init
self.attribute_s = 'This is an atribute'
self.attribute_l = 456
return, 1
end

pro object__define
str ={ object, $
attribute_s: '', $
attribute_l: 0l }
end

a = Obj_New('object')
a -> Help
END

When I run this I get:

ATTRIBUTE_S : STRING = 'This is an atribute'
ATTRIBUTE_L : LONG = 456

Cheers,

David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Sepore ma de ni thui. ("Perhaps thou speakest truth.")

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[Message index]

		Re: Treating an object as a structure By: David Fanning on Wed, 04 March 2009 15:39
		Re: Treating an object as a structure By: natha on Wed, 04 March 2009 15:05
		Re: Treating an object as a structure By: David Fanning on Wed, 04 March 2009 13:59
		Re: Treating an object as a structure By: natha on Wed, 04 March 2009 13:26
		Re: Treating an object as a structure By: David Fanning on Wed, 04 March 2009 12:40
		Re: Treating an object as a structure By: natha on Thu, 05 March 2009 07:36
		Re: Treating an object as a structure By: Michael Galloy on Wed, 04 March 2009 15:45

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