Re: [Boost-users] BOOST_FOREACH question

Subject: Re: [Boost-users] BOOST_FOREACH question
From: Steven Watanabe (watanabesj_at_[hidden])
Date: 2009-06-17 18:51:02

AMDG

Zachary Turner wrote:
>      std::for_each(
>           boost::make_zip_iterator(boost::make_tuple(inputs.begin(),
> outputs.begin())),
>           boost::make_zip_iterator(boost::make_tuple(inputs.end(),
> outputs.end())),
>           boost::bind(
>                &boost::asio::io_service::post,
>                &work_io_service_,
>                boost::bind(
>                     &EncoderService::encode_handler,
>                     this)));
> }
>   

Nested binds are treated specially.  You need to use boost::protect.
However, you're still left with the problem that there's no good way
to propagate the zip_iterator value from the outer bind to the inner bind.

What you really want is something like this, although it won't quite work,
because boost::bind is an overloaded function template
boost::bind(
    &boost::asio::io_service::post,
    &work_io_service,
    boost::bind(
        &boost::bind,
        &EncoderService::encode_handler,
        this,
        _1))

> void encode_handler(const boost::tuple<const_buffer, mutable_buffer>& buffers)
> {
> }
>   

In Christ,
Steven Watanabe