Comments (5)
I don't think a traditional do
syntax would be very useful in objc.
If all you're doing is chaining bind:
s, the syntax would be just a bit lighter, but the general readability would suffer because of it's inconsistency with the rest of the code.
If you're composing bind:
s, objc already allows you to assign the result of bind:
s to variables, so there's no need for a <-
operator.
What really hurts readability as it is now, is splitting and merging streams through publish
and combineLatest:
, or working with a lot of tuples to avoid doing that. Especially since objc's type signatures don't allow you to specify what is in the tuples.
from reactivecocoa.
If you're composing bind:s, objc already allows you to assign the result of bind:s to variables, so there's no need for a <- operator.
This is a little bit of a red herring, because:
do
x <- M
…
maps to something like the following Objective-C:
[M bind:^(id x) {
…
}];
That said, I agree with your overall point. I don't think do
syntax would be that useful for how RAC is generally going to be used.
from reactivecocoa.
I think the value of do
syntax is that deeply nested binds are gross.
So, compare:
do
x <- f1
y <- f2 x
z <- f3 x y
return x + y + z
vs.
[[self f1] bind:^(id x) {
return [[self f2:x] bind:^(id y) {
return [[self f3:x and:y] bind:^(id z) {
return [self.class return:[[x plus:y] plus:z]];
}];
}];
}];
Nesting aspolsion.
The question in my mind is whether a macro could be better enough to make it worthwhile.
from reactivecocoa.
A do
macro would end up fairly similar to Clojure's:
do(
x, [self f1],
y, [self f2],
z, [self f3:x and:y],
[self.class return:[[x plus:y] plus:z]]
)
I just don't think people will be binding that often/intensely.
from reactivecocoa.
Yeah, I agree. Not much better and probably rare.
from reactivecocoa.
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from reactivecocoa.