Proto for Boost mailing list page: Re: [proto] vector of proto expressions

Subject: Re: [proto] vector of proto expressions
From: Nate Knight (Nate.Knight_at_[hidden])
Date: 2011-03-18 10:59:07

>
> In pseudo code it should look like this:
>
> Expressions< N > expressions;
> construct( expressions );    // or something similar
> do_step( epxressions , x ); // my method

How about something like?

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

#include <boost/proto/proto.hpp>

using namespace boost::proto;

template<class Expr, class X>
void my_method(Expr const& e, X const& x)
{
}

int main()
{
    using namespace boost::proto;

    terminal<int>::type i = {0};
    my_method( (i+i, i*i, i*i*i), 10);
}

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Notice that you don't need to explicitly store the expressions in a container, you can just combine them in a larger expression tree which can be parsed in my_method.

Nate

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