Tuple to tuple conversion
Lars T. Kyllingstad
public at kyllingen.NOSPAMnet
Mon Jun 7 23:53:20 PDT 2010
On Tue, 08 Jun 2010 03:29:05 +0200, Simen kjaeraas wrote:
> Sounds stupid, don't it?
> Carrying in my hat my trusty foo, a std.typecons.Tuple!(float), I want
> to use it as a parameter to a function taking non-tuple parameters, i.e.
> a single float. foo.tupleof gives me an unwieldy conglomerate of
> tuple((Tuple!(float))._field_field_0,(Tuple!(float))._0). First, I'm not
> sure what all of this means, second I'm completely sure it does not mean
> what I want.
> foo.field seems much more close to what I want, returning a nice and
> clean (float) when I ask for it. However, doing so in the context of
> being a function parameter yields other problems, in the form of:
> src\phobos\std\typecons.d(424): Error: static assert
> (is(Tuple!(string,float) == Tuple!(string,float))) is false
> src\phobos\std\typecons.d(413): instantiated from here:
> src\phobos\std\typecons.d(423): instantiated from here:
> slice!(1,3) problem.d(15): 3 recursive instantiations from here:
FWIW, I've run across the same error, while writing code that had nothing
to do with tuples. And I've seen others complaining about it too. It
seems to be a rather elusive bug in Phobos.
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