When is a closure a real one? [was: Real closures]
Klaus D. Witzel
klaus.witzel at cobss.com
Sun Oct 8 09:43:36 UTC 2006
on Sun, 08 Oct 2006 11:26:00 +0200, you wrote:
> Klaus D. Witzel a écrit :
>> Thank you Mathieu and Phillipe for you pointers and example.
>> Just out of curiosity (and as input for writing accurate yes/no test
>> cases :) let me ask what is expected by the community (apologies if this
>> sounds like a silly question ;-) when is a closure a real one:
>> 1] after #fixTemps (or equivalent)
>> 2] after #blockCopy: (is this equivalent to 1?)
> no and it's not equivalent to 1.
And *exactly after* the respective operation? Don't they have the same
values represented by the same names?
> In fact blockCopy create a BlockContext.
> And a BlockContext is not a closure, it's more like MethodContext.
This is the question that I'm trying to address by using equivalency (not
identity). A counter example for you: a block with a single argument which
does *not* access anything else but the argument, always has equivalent
state and behavior (in terms of what you put inside [:x|...]) and that is
regardless of 1, 2 or 3.
>> 3] after #createBlock: (is this equivalent to 1? to 2?)
> Yes and in a way it can be equivalent to 1 plus 2.
In what way, mind to elaborate a bit. Thank you.
>> 4] <put: your requirements: or thoughts: here>
>> Thank you for your time!
More information about the Squeak-dev