Add ability to specify a function doesn't need args fully resolved when used inside let-flow
#203
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…side `let-flow` Some functions, like `d/alt` are designed to handle deferrables as arguments. `let-flow` shouldn't wait on args to functions like these to have been resolved before invoking the function. With this change set, all the functions inside `manifold.deferred` that are designed to work with deferrables will now behave as "expected" inside a `let-flow` block. Users can mark their own functions with the metadata `manifold.deferred/deferred-args` to have `let-flow` treat those the same way.
KingMob
reviewed
Feb 25, 2023
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| (is (>= 200 (- (System/currentTimeMillis) start)) | ||
| "Alt in body should only take as long as the first deferred to finish.")) |
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I don't think we can make this change for let-flow bodies, only bindings. The docstring explicitly says "The body will only be executed once all of the let-bound
values, even ones only used for side effects, have been computed.", and some users may be relying on that.
More generally, an alt in the body only makes sense if some of its arguments aren't bound in the let-flow. If all of them are, then it's essentially random, which is fine, but may not be what they expect.
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Also related to #141 |
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Some functions, like
d/altare designed to handle deferrables as arguments.let-flowshouldn't wait on args to functions like these to have been resolved before invoking the function.
With this change set, all the functions inside
manifold.deferredthat are designed to work withdeferrables will now behave as "expected" inside a
let-flowblock. Users can mark their ownfunctions with the metadata
manifold.deferred/deferred-argsto havelet-flowtreat those thesame way.
Addresses #183
N.B. This includes the changes from #202 , which I've done to not cause merge conflicts between the two change sets.