I copy that. Thanks for the explanation.
On Aug 18, 1:22 pm, Matt Fowles <matt.fow...@gmail.com> wrote:
> Armando~
>
> Libraries that target JRE 1.2 compatibility, will not call
> `Boolean.valueOf(var)` internally. Instead they will call `new
> Boolean(var)`. If they return those results to modern java code, it will
> unbox correctly into either true or false and thus work as expected in
> constructs of the form:
>
> if (old_library_call()) {
> // handle true
>
> } else {
> // handle false
> }
>
> If clojure's `if` form does not correctly unbox Booleans in the same manner,
> then that really should be viewed as a bug in Clojure. As these libraries
> are not likely to change to using the newer `Boolean.valueOf()` since that
> break compatibility. Yes, they could create their own static factory for
> Booleans and call that instead, but I don't think consumers of the library
> are going to want to figure out (the hard way) that they need to hack their
> library to use it from Clojure.
>
> Matt
>
> On Wed, Aug 18, 2010 at 4:07 PM, Armando Blancas
> <armando_blan...@yahoo.com>wrote:
>
>
>
> > I don't see what the concern may be. Can you elaborate?
>
> > On Aug 18, 10:04 am, Matt Fowles <matt.fow...@gmail.com> wrote:
> > > All~
>
> > > Boolean.valueOf() was added in 1.4. While that seems ancient, some older
> > > libraries use 'new Boolean()' because they maintain 1.2 compatibility.
> > It
> > > seems like Clojure should take more care when it unboxes Booleans...
>
> > > Matt
>
> > > On Wed, Aug 18, 2010 at 12:57 PM, Nicolas Oury <nicolas.o...@gmail.com
> > >wrote:
>
> > > > I am not an expert. Is it possible on some JDK to put a breakpoint on
> > > > Boolean constructor and look at the stack?
> > > > Or you can't put a breakpoint on standard library?
>
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