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From: Peter Dimov (pdimov_at_[hidden])
Date: 2008-08-22 18:55:22

David Abrahams:
> on Wed Aug 20 2008, "Peter Dimov" <> wrote:
>> Hi,
>> Assume that I have a custom type sequence S that has two operations,
>> size<S>::value and element<S,I>::type (with whatever spelling).
>> What needs to be done to adapt S into a conforming MPL or Fusion
>> sequence?
>> In a perfect world, the answer would not require the inclusion any MPL
>> or Fusion headers and would consist of three specializations. ;-)
> Well, if it's an MPL sequence it's a fusion sequence, IIUC. So you need
> to decide which sequence to model

My original S is a random access sequence, so I'd probably want to model

> According to
> you can make a forward sequence with 5 specializations.

That's manageable, but I'd need a random access iterator first. An integral
constant, too, if I really don't want to include an MPL header. It would've
been nice if I could just point MPL to size<> and element<> and tell it to
build the rest of the required boilerplate. Patches welcome, you say? :-)

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