Re: [boost] lamda question

From: Kevin Spinar (spinarkm_at_[hidden])
Date: 2006-07-27 21:48:57

On 7/27/06, Joe Van Dyk <joevandyk_at_[hidden]> wrote:
> I have Boost 1.33.1 installed.  I'm trying to use Boost.Lamda.
>
> I included all the headers mentioned in the documentation as an
> attempt to fix the compile error.
>
> #include <boost/lambda/lambda.hpp>

[snip unneeded includes]

#include <algorithm>

> #include <list>
>
> int main()
> {
>    using namespace std;
>    using boost::lambda;
>
>    list<int> v(10);
>    for_each(v.begin(), v.end(), _1 = 1);
> }
>
>
> % g++ lambda.cpp

you should compile with -W -Wall -pedantic -ansi at a minimum.

> lambda.cpp: In function `int main()':
> lambda.cpp:20: error: `_1' undeclared (first use this function)
> lambda.cpp:20: error: (Each undeclared identifier is reported only once for
>    each function it appears in.)
>
> Using gcc 3.3.1.

Consider upgrading to gcc 4.  With gcc 4, I get:

error: namespace 'boost::lambda' not allowed in using-declaration

Kevin Spinar