Re: [boost] BOOST_PP_SEQ_SUBSEQ bug?

From: David Abrahams (dave_at_[hidden])
Date: 2006-11-05 17:25:22

David Abrahams <dave_at_[hidden]> writes:

> #include <boost/preprocessor/seq/subseq.hpp>
> BOOST_PP_SEQ_SUBSEQ( (p0)(p1)(p2)(p3)(p4), 0, 1)
> BOOST_PP_SEQ_SUBSEQ( (p0)(p1)(p2)(p3)(p4), 1, 2)
> BOOST_PP_SEQ_SUBSEQ( (p0)(p1)(p2)(p3)(p4), 2, 3)
> BOOST_PP_SEQ_SUBSEQ( (p0)(p1)(p2)(p3)(p4), 3, 4)
>
> yields
>
> (p0)
> (p1) (p2)
> (p2) (p3) (p4)
> fu.cpp:5:1: error: macro "BOOST_PP_TUPLE_ELEM_2_0" requires 2 arguments, but only 1 given
> BOOST_PP_TUPLE_ELEM_2_0
>
> on g++-4.0.3
>
> I don't think that's what's intended, is it?

...and then it hit me: the 3rd parameter is the desired length of the
subsequence!

duh, sorry.

-- 
Dave Abrahams
Boost Consulting
www.boost-consulting.com