Re: [Boost-users] [Fusion] Flatten a sequence of sequences

Subject: Re: [Boost-users] [Fusion] Flatten a sequence of sequences
From: TONGARI (tongari95_at_[hidden])
Date: 2010-12-07 12:25:01

2010/12/7, Clinton Mead <clintonmead_at_[hidden]>:
> Hi All
>
> Lets say I have something like the following:
>
> make_vector(1, make_vector('b', 3, make_vector(4, 5.5), "six"), 7, 8)
>
> I want to produce an function f such that
>
> f(make_vector(1, make_vector('b', 3, make_vector(4, 5.5), "six"), 7, 8)) ->
> [1,'b',3,4,5.5,"six",7,8]
>
> i.e. a flattened version of the sequence.

Hmmm...not sure if there's already something for that.
Just after seeing your post, I gave it a try to implement it (see attachment),
but there's a problem in this implementation that needs to hack into
Fusion code (not knowing where am I doing wrong). If you want it
compiled, comment away line 39 in <boost/fusion/iterator/distance.hpp>

> I don't mind if this is a view of the original sequence or an actual vector.
>
> I don't mind a solution in C++0x if it can compile on GCC 4.5.1.

The code attached is written with current standard and the function
returns a view.

Sorry if this doesn't help, perhaps others would give better solutions.