2014-05-16 0:29 GMT+02:00 Jon Purdy evincarofaut...@gmail.com:
Is that it's only use? Then why? dip can easily be formulated using
non-retain stack using primitives:
For example: a b c [ append ] dip - a b c -rot append swap
That implementation assumes the quotation takes two operands and
Björn Lindqvist bjou...@gmail.com
writes:
Hi!
Is that it's only use? Then why? dip can easily be formulated using
non-retain stack using primitives:
For example: a b c [ append ] dip - a b c -rot append swap
What if the contents of the quotation use more than one item from the
stack? How
On Fri, May 16, 2014 at 7:38 AM, Björn Lindqvist bjou...@gmail.com wrote:
2014-05-16 0:29 GMT+02:00 Jon Purdy evincarofaut...@gmail.com:
Is that it's only use? Then why? dip can easily be formulated using
non-retain stack using primitives:
For example: a b c [ append ] dip - a b c -rot
Hi Bjorn,
The retain stack is used to implement the 'dip' combinator.
Slava
On Thu, May 15, 2014 at 1:46 PM, Björn Lindqvist bjou...@gmail.com wrote:
Hi everyone,
I've been walking around in Factors VM for a while and there is a lot
of usages and references to the retain stack. But I
So the retain stack is useless? Freeing up a whole register sounds
like it should be great for performance, at least on 32 bit x86.
You can make a complete stack-based concatenative language with only
one stack. But some combinators are implemented more efficiently when
you have scratch space
Hi!
Is that it's only use? Then why? dip can easily be formulated using
non-retain stack using primitives:
For example: a b c [ append ] dip - a b c -rot append swap
2014-05-15 22:49 GMT+02:00 Slava Pestov sl...@factorcode.org:
Hi Bjorn,
The retain stack is used to implement the 'dip'
Is that it's only use? Then why? dip can easily be formulated using
non-retain stack using primitives:
For example: a b c [ append ] dip - a b c -rot append swap
That implementation assumes the quotation takes two operands and
produces one result, which is not always the case. More
In the current state of Kitten:
Oop, correction: this is not Kitten syntax. I had been writing in
Kitten but decided against it, then forgot to update the text. Current
Kitten would be:
def dip {.r, .s, a}(.r a (.r - .s) - .s a): …
But this is a Factor mailing list. ;)
