Determine if a value is Callable/Constructible

Allen Wirfs-Brock allen at
Mon Mar 30 07:51:29 UTC 2015

> On Mar 30, 2015, at 8:40 AM, Axel Rauschmayer <axel at> wrote:
> It doesn’t seem that big of a deal, but one risk is: people mistaking a class for a constructor, trying to subclass it as if it were a constructor and things failing silently.
Can you give an example of what you mean?


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