From: Peter Dimov (pdimov_at_[hidden])
Date: 2001-07-13 09:52:29
From: "Douglas Gregor" <gregod_at_[hidden]>
> On Tuesday 10 July 2001 09:38, you wrote:
> > I've updated bind.hpp. It now supports member function pointers and
> > accept()s visitors. :-)
> A few comments/questions:
> - BOOST_BIND: why? Is this a workaround for MSVC?
Yes. function.hpp indirectly includes type_traits/conversion_traits.hpp. It
contains a nested class template named 'bind'. This breaks the
syntax under MSVC.
There are two workarounds:
1. Rename the nested 'bind' class template to something like 'bind_17' or
2. #define BOOST_BIND to something other than 'bind' and use that instead.
I prefer (1), but if the maintainers of the other libraries that use 'bind'
as a common name for a nested class template don't want to change their
implementations, (2) remains an option.
> - accept(): The code invokes the visitor with the bare a1, a2, etc. This
> means the the visitor may see ref_t<T> or value<T> arguments. Is this
> intended behavior?
Yes. See bind_test_4.cpp. This allows you to handle references differently.
> If so, ref_t<T> and value<T> must be specified as part of
> the visitor concept.
Only if your visitor intends to handle them. The 'accept' member is
primarily to support integration with other libraries, not for the end user.
-- Peter Dimov Multi Media Ltd.
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