template specialization with array / unique_ptr

Milian Wolff mail at milianw.de
Mon Feb 20 15:58:41 UTC 2012

On Monday 20 February 2012 13:05:06 Milian Wolff wrote:
> Hey there,
> I'm currently trying to fix https://bugs.kde.org/show_bug.cgi?id=294306 .
> I've fixed the type_visitor to take the array into account, such that the
> specialization is properly created with T[]. But it doesn't seem to be
> possible to mark an identifier as "array" instead of e.g. pointer or
> reference. This seems to be required though to ensure that instantiation
> finds the proper template though I think. I wonder how to fix this... Esp.
> for 4.3 without breaking the ABI for identifier, it doesn't seem to be
> possible - or?
> Note: With my fix to type_visitor, unique_ptr<Foo>() will at least take the
> unspecialized version, i.e. the one with operator->(). But
> unique_ptr<int[]>() or similar will still break, since it cannot find the
> specialization with [] (see above).
> Also regarding unique_ptr and probably other STL stuff: It uses SFINAE to
> figure out the return type (see unique_ptr::_Pointer) paired with decltype
> which doesn't seem to work yet... so more work ahead of me :-/
> cheers

I've pushed some work towards it and will now try to look at the SFINAE 
Milian Wolff
mail at milianw.de
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