Re: [Cppcms-users] init(content::base &) can't be used in derived class of cppcms::application

[kpeo <sla...@ya...>]

Thank you for so detailed information and fast answer!
I take last revision (1661) and all works fine!

Also, think too that using new init functions in cppcms::application be more clear and convenient way for future use.

30.01.2011, 18:20, "Artyom" <art...@ya...>:
> Hello,
>
> There were new virtual member functions where added
> to cppcms::application:
>
>   void init()
>   void clear();
>
> That are called upon URL Dispatching automatically.
>
> Because you have your own init(foo &) it overloads application::init and
> actually
> hides it.
>
>    Because:
>       struct foo {
>          void init();
>       }
>
>       struct bar : public foo {
>          void init( int y);
>       }
>
>    Then:
>
>       bar b;
>       b.init() -- illegal as it hidden by overloaded version
>       you need to add
>
>       struct bar : public foo {
>          void init( int y);
>          void init() { foo::init(); }
>       }
>
> So simplest thing you can do is to add to your app
>
>    void init() {} if you don't use it at all
>
> Or better
>
>    void init() { my_parent_class::init(); }
>
> So it would not be unhidden.
>
> All this for support of additional programming
> style when your application and context can be the same
> object which may be very convenient because it allows
> to access much more powerful tools from view.
>
> See exaples/message_board
>
> In the second thought..
>
> I can fix it so it would work with overloading.
>
> Take rev. 1659, it should work fine.
>
> Artyom
>
> ----- Original Message ----
>
>>  From: kpeo <sla...@ya...>;
>>  To: cpp...@li...
>>  Sent: Sun, January 30, 2011 4:41:20 PM
>>  Subject: [Cppcms-users] init(content::base &) can't be used in derived class of
>> cppcms::application
>>
>>  Hello Artyom and all!
>>
>>  As i understood correctly, function like  init(content::base &) can't be used
>> now in derived class of  cppcms::application since r1653 of
>> cppcms/url_dispatcher.h, where new   init() is now used.
>>
>>  So we should to rename our init(content::base &)  function to ini(content::x &)
>> for example, to avoid compile errors  like:
>>
>>  /usr/local/include/cppcms/url_dispatcher.h: In constructor
>> ‘cppcms::url_dispatcher::page_guard<C, typename
>> booster::enable_if<booster::is_base_of<cppcms::application, C>,
>> void>::type>::page_guard(C*) [with C =  app::project]’:
>>  /usr/local/include/cppcms/url_dispatcher.h:210:    instantiated from ‘void
>> cppcms::url_dispatcher::binder0<C>::operator()()  const [with C =
>> app::project]’
>>  /usr/local/include/booster/function.h:163:   instantiated  from ‘void
>> booster::function<Result()>::callable_impl<void,  F>::call() [with F =
>> cppcms::url_dispatcher::binder0<app::project>,  Result = void]’
>>  /media/opnp/project.cpp:161:   instantiated from  here
>>  /usr/local/include/cppcms/url_dispatcher.h:187: error: no matching  function
>> for call to ‘app::project::init()’
>>  /media/opnp/project.cpp:49: note:  candidates are: void
>> app::project::init(content::base&)
>>
>>  /media/opnp/project.cpp:161 - end  '}' of "namespace app {"
>>
>>  /media/opnp/project.cpp:49:
>>
>>  46:  project::project(site &s) :     base(s)
>>  47: {
>>  48: //
>>  49:  w.dispatcher().assign("^/?project/?(\\w+)?/?$",&project::out,this,1);
>>
>>  So,  i understand correctly and this is not a  bug?
>>
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>
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