[squeak-dev] The Trunk: Collections-ct.982.mcz
leves at caesar.elte.hu
Sun Jan 30 18:23:53 UTC 2022
On Sun, 30 Jan 2022, Tobias Pape wrote:
> That's just HOM with additional hops, right? ;D
Never heard about HOM. I assume you meant Higher order message.
In that case, ChainedObjectWrapper is similar but different: it only
adds one selector to Object, #wrap:, which is only there for convenience.
It could be a class-side method of ChainedObjectWrapper.
While HOM either adds all those selectors with one less argument to all
those classes, e.g #select to everything that implements #select:, or it
implements #doesNotUnderstand: on Object.
Both options have unpleasant side-effects.
Another difference is the purpose. The idea here is to turn cascaded
messages sent to the wrapper into chained message sends to the wrapped
object inside a single block. So that you don't feel like implementing
#select:thenCollect:andFinallyReject: and friends.
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