[Vm-dev] Having a specific class for temp vectors

Levente Uzonyi leves at elte.hu
Sat Nov 21 16:29:59 UTC 2015

I checked how the implementation actually works, and I came to the 
conclusion that using a separate class might be a good idea, because 
there's no easy way to tell if an Array returned by #tempAt: is a temp 
vector with some temporaries or just a regular array in a temporary 
variable. This means that returning the wrapped objects would 
probably require a lot more changes.

I'd still refrain from the additional changes which would introduce some 
overhead in the methods you listed. Why?
For #become:, I understand the reason why you'd want it to add the check, 
but there are so many other cases to handle (e.g.: "true become: false") 
if you want to make #become: safer.
For immutability, I don't see the reason for the restriction. What if I, 
as the programmer, want to do a little hack, and overwrite the value of a 
temporary variable of a given block. That should work IMHO. So making the 
array immutable is fine, making the user unable to make it mutable is 


On Sat, 21 Nov 2015, Levente Uzonyi wrote:

> Wouldn't it be a better solution to change #tempAt: to return the wrapped 
> object instead of the temp vector?
> Levente

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