It won't be fast because it creates multiple blocks, whereas a "native" version would not. To be honest I have not implemented exceptions in my Smalltalk yet, but I want to inline []on:do: constructions. The VAST system I have is 8.6.3, and it supports ANSI Exceptions. On Tue, 9 Apr 2019 at 00:31, Esteban Maringolo <emaringolo@gmail.com> wrote:
Richard,
I was going to comment the #when:do:[when:do:] approach of VAST [1].
Why do you say it won't be fast? Because of the multiple exception handlers in the call stack?
I think that some construct might be used to obtain the same as the #when:do:when:do: but using a chained approach instead.
Regards,
[1] AFAIR when I used VAST (+a decade ago) it didn't have "ANSI" exceptions.
Esteban A. Maringolo
El lun., 8 abr. 2019 a las 0:49, Richard O'Keefe (<raoknz@gmail.com>) escribió:
VisualAge Smalltalk has, in addition to the standard #on:do:, #when:do:, ..., #when:do:#when:do:#when:do:#when:do:#when:do:, with the last four mapping to #whenOneOf:doMatching:, taking two arrays.
It's easy enough to add your own methods like on: exn1 do: act1 on: exn2 do: act2 "An imperfect emulation of VAST's #when:do:when:do:" ^[self on: exn1 do: act1] on: exn2 do: act2
on: exn1 do: act1 on: exn2 do: act2 on: exn3 do: act3 "An imperfect emulation of VAST's #when:do:when:do:when:do:" ^[[self on: exn1 do: act1] on: exn2 do: act2] on: exn3 do: act3 to BlockClosure. It won't be fast, but your code might be clearer.
On Mon, 8 Apr 2019 at 10:21, Tim Mackinnon <tim@testit.works> wrote:
Thanks, I guess that makes sense, although it somehow looks a bit ugly
with the nested brackets.. but nothing else springs to mind so maybe Iâll get used to it (and In my case I think itâs likely 2 or 3 different exceptions)
Tim
Sent from my iPhone
On 7 Apr 2019, at 20:43, Richard Sargent <
richard.sargent@gemtalksystems.com> wrote:
This last one.
[[self run] on: TestFailure do: [:testEx | ...]] on: Error do: [:error | ...]