This is exactly my use case as well. I want to provide the user a nice DSL
but make it easy to automatically generate input. The idea I had was the
user could write things in the DSL and for automatic generation you could
just generate the conformed structure.
The other thing it's made me notic
Alex, I thought about this and it appears to be a convenience problem. Spec
is e. g. excellent to parse a e. g. a Query DSL (which is my current side
project) via conform. But then you have that large data structure that you
want to break down and operate on in several functions. So you need to
I think you may be confusing the return value of a predicate value (acting as a
spec) with the return value of the function passed to conformer.
In the former case a predicate function's return value is a logically truthy
value and a return of nil or false indicates the value is invalid.
The fu
I was asking how you would conform a value to a falsey value. If the
interface for the function is that returning nil or false means that the
input is not valid (which is what I understood from the discussion) then
how can you conform to nil or false? However, on reading the docs for
conformer
user=> (doc s/conformer)
-
clojure.spec/conformer
([f] [f unf])
Macro
takes a predicate function with the semantics of conform i.e. it should
return either a
(possibly converted) value or :clojure.spec/invalid, and returns a
spec that uses it as a predicate/conformer.
I don't understand the question. What are you trying to do?
On Wednesday, August 31, 2016 at 4:08:00 PM UTC-5, l0st3d wrote:
>
> So how would you conform something to nil or false? For example:
>
> (s/conform (s/conformer read-string) "nil")
>
> ?
>
>
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So how would you conform something to nil or false? For example:
(s/conform (s/conformer read-string) "nil")
?
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I think Alex's point was given any arbitrary function can be used as the
conform part of the spec, this wouldn't be possible. Ie
boot.user=> (s/conform (s/conformer inc) 1)
2
On Saturday, June 18, 2016 at 10:35:10 AM UTC-7, Leon Grapenthin wrote:
>
> I am not sure whether I understand what you m
Yes I have tried that. As soon as you use things like `or` or `alt` it
becomes quite the tedious manual effort and you don't get away with s/keys
anymore.
On Saturday, June 18, 2016 at 8:35:20 PM UTC+2, Josh Tilles wrote:
>
> Have you considered choosing labels that are themselves qualified
> k
I just realized that in my example, I probably should have used
`s/get-spec` instead of `s/spec` when defining the labels. Oh well.
On Saturday, June 18, 2016, Josh Tilles wrote:
> Have you considered choosing labels that are themselves qualified
> keywords with registered specs? That might feel
Have you considered choosing labels that are themselves qualified
keywords with registered specs? That might feel like a workaround, but
I think it could get you most of what you’re looking for.
For example:
```
(s/def ::even-spec even?)
;= :user/even-spec
(s/def ::odd-spec odd?)
;= :user/odd-spe
I am not sure whether I understand what you mean.
Behavior of conform for predicates is to return its return value if it is
logically true, ::s/invalid otherwise. Thus the predicate itself is the
spec to its conform*.
s/conformer is only limiting as much as it is to unform, a user would have
Given that conform takes an arbitrary (opaque) function, I don't think
that's generically possible.
On Saturday, June 18, 2016 at 7:37:33 AM UTC-5, Leon Grapenthin wrote:
>
> Assume I parse with conform.
>
> Then I have functions that operate on the value returned by conform. I
> want to spec
Assume I parse with conform.
Then I have functions that operate on the value returned by conform. I want
to spec them.
But I can't get a spec for the value returned by conform (so that I can
spec said functions) automatically.
Imagine `(s/conform-spec ::my-spec)` would return the spec of the
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