Re: [Boost-users] Boost.Signals example/doc_view application question

From: Allen Gooch (mojocode_at_[hidden])
Date: 2006-08-05 17:42:06

My example posted was incorrect.  I was calling with m_sig(). Corrected
below. Other ideas?

many thanks!
-allen

On 8/4/06, Wu Yinghui, Freddie <yhwu_at_[hidden]> wrote:
>
> [snip]
> > The View abstract base class requires concrete bases to provide a
> > concrete implementation of the refresh() member function matching the
> > slot signature required.
> >
> > class View
> > {
> > public:
> >     virtual void refresh(bool) const = 0;
> >     // ...
> > };
> >
> > Here's my problem.  If I change the signal to take no args using the
> > preferred or portable syntax I get compilation errors:
> >
> > class Document
> > {
> > public:
> >     typedef boost::signal< void () >  signal_t;
> >     // ...
> >
> >     void append(const char* s)
> >     {
> >         m_text += s;
> >         m_sig();
> You should use
>           m_sig();
> instead!
>
> >     }
> >     // ...
> > };
> >
> > class View
> > {
> > public:
> >     virtual void refresh() const = 0;
> >     // ...
> > };
> >
> > Compilation output (msvc-7.1):
> >
> > Compiling...
> > SignalTest.cpp
> > c:\Boost\include\boost-1_33_1\boost\bind.hpp(63) : error C2825:
> > 'F::result_type': cannot form a qualified name
> >         c:\Boost\include\boost-1_33_1\boost\bind\bind_template.hpp(15) :
> > see reference to class template instantiation
> > 'boost::_bi::result_traits<R,F>' being compiled
> >         with
> >         [
> >             R=boost::_bi::unspecified,
> >             F=void (__thiscall View::* )(void) const
> >         ]
> >         c:\development\SignalTest\SignalTest.cpp(49) : see reference to
> > class template instantiation 'boost::_bi::bind_t<R,F,L>' being compiled
> >         with
> >         [
> >             R=boost::_bi::unspecified,
> >             F=void (__thiscall View::* )(void) const,
> >             L=boost::_bi::list2<boost::_bi::list_av_2<View
> > *,boost::arg<1>>::B1,boost::_bi::list_av_2<View *,boost::arg<1>>::B2>
> >         ]
> > c:\Boost\include\boost-1_33_1\boost\bind.hpp(63) : error C2039:
> > 'result_type' : is not a member of 'operator``global namespace'''
> > c:\Boost\include\boost-1_33_1\boost\bind.hpp(63) : error C2146: syntax
> > error : missing ';' before identifier 'type'
> > c:\Boost\include\boost-1_33_1\boost\bind.hpp(63) : error C2955:
> > 'boost::_bi::type' : use of class template requires template argument
> list
> >         c:\Boost\include\boost-1_33_1\boost\bind.hpp(112) : see
> > declaration of 'boost::_bi::type'
> > c:\Boost\include\boost-1_33_1\boost\bind.hpp(63) : fatal error C1903:
> > unable to recover from previous error(s); stopping compilation
>
> Cheers,
>
> Freddie
>
>
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