Re: [Boost-users] [program_options] How to use "notifier" in options_description with member functions?

Subject: Re: [Boost-users] [program_options] How to use "notifier" in options_description with member functions?
From: jiangzuoyan_at_[hidden]
Date: 2010-10-24 22:01:02

try this with boost::bind

           ("option", po::value<int>()->notifier(
               boost::bind(&test::function, this, _1)), "Option")

                                                      Changsheng Jiang

On Mon, Oct 25, 2010 at 06:06, Carlos Franke
<carlos_franke_at_[hidden]>wrote:

> Hello!
>
> I am looking for advice about the use of the "notifier" function in
> program_options::options_description with class methods. My problem seems
> very basic to mee, yet I wasn't able to find the (any) related
> documentation.
>
> Here is a minimal example of what I cannot get to work:
>
> struct test
> {
>    void function(int i) {std::cout << i << std::endl;}
>
>    void does_not_compile()
>    {
>        po::options_description desc;
>        desc.add_options()
>            ("option", po::value<int>()->notifier(&test::function),
> "Option")
>        ;
>    }
> };
>
> Compilation fails with:
> […]
> test.cpp:62:82:   instantiated from here
> /usr/include/boost/function/function_template.hpp:225:11: error: no match
> for call to '(boost::_mfi::mf1<void, test, int>) (const int&)'
> /usr/include/boost/bind/mem_fn_template.hpp:163:7: note: candidates are: R
> boost::_mfi::mf1<R, T, A1>::operator()(T*, A1) const [with R = void, T =
> test, A1 = int]
> /usr/include/boost/bind/mem_fn_template.hpp:184:7: note:                 R
> boost::_mfi::mf1<R, T, A1>::operator()(T&, A1) const [with R = void, T =
> test, A1 = int]
>
> Sorry if this is trivial. Your help is all the more appreciated!
>
> Carlos
>
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