Re: [Boost-users] eigen2 and multi_array

Subject: Re: [Boost-users] eigen2 and multi_array
From: Suresh Kumar (suresh.amritapuri_at_[hidden])
Date: 2010-09-16 14:47:14

On Wed, Sep 15, 2010 at 7:36 PM, Eric Niebler <eric_at_[hidden]> wrote:

> On 9/15/2010 10:14 PM, Suresh Kumar wrote:
> > Hi
> > I was trying to use boost::multi_array in a project where I am already
> > using eigen2. The following lines does not compile in my code, though
> > it compiles correctly outside my project ie as a standalone program
> > where eigen is not used.
> >
> > typedef multi_array<double, 2> array_type;
> > array_type scores(extents[1][1]);
> >
> > compiler error: ‘extents’ is not a type
> >
> > Any suggestions?
>
> Looks like the Most Vexing Parse. Try adding parens:
>
> array_type scores((extents[1][1]));

I tried 3 different things and each one gives a different error:

1. array_type scores((extents[1][1])); error: expected identifier before ‘(’
token

2. array_type::extent_gen extents;
array_type scores((boost::extents[1][1]));

long list of errors:  expected identifier before ‘(’ token
error: expected unqualified-id before ‘[’ token
error: expected ‘)’ before ‘[’ token
error: expected ‘)’ before ‘[’ token
error: ‘scores’ declared as function returning an array
error: expected ‘;’ before ‘)’ token

3. array_type::extent_gen extents;
array_type scores(boost::extents[1][1]);
error: ‘boost::extents’ has not been declared

needless to say i am going crazy with the compile errors. I am using Boost
Version: 1.40.0.1 on Ubuntu 10.04 (in case this helps...)

thanks
suresh

-- 
R Suresh Kumar,
http://www.ee.ucr.edu/~sramachandranna
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