Kevin Wan wrote:

I've added a delegate implementation in C++.

What exactly are the advantages of your delegate over the existing libraries Boost.Function and Boost.Signals? Sebastian Redl

in boost::signals docs, there is an example: deliverNews.connect <http://www.boost.org/doc/html/signalN.html#id2551390-bb>(boost::bind(&NewsMessageArea::displayNews, newsMessageArea, _1)); if use my implementation, it will look like: deliverNews.connect <http://www.boost.org/doc/html/signalN.html#id2551390-bb>(newsMessageArea, &NewsMessageArea::displayNews); as you see, it's kind of easier. and the implementation code is much simpler. i just want to share my library with others, if it helps. Thanks, Kevin On 2/11/06, Kevin Wan <wanjunfeng@gmail.com> wrote:

actually my implementation almost has the same behavior with C# delegate.

the biggest advantage is easy to use.

thanks, Kevin

On 2/11/06, Sebastian Redl <sebastian.redl@getdesigned.at> wrote:

...

Kevin Wan wrote:

...

I've added a delegate implementation in C++.

What exactly are the advantages of your delegate over the existing libraries Boost.Function and Boost.Signals?

Sebastian Redl _______________________________________________ Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost

-- Things don't just happen, you have to make them happen.

-- Things don't just happen, you have to make them happen.

my delegate supports: 1, functions 2, static member function 3, non-const member functions 4, const member functions 5, functors BTW, it supports multi-threading and i've uploaded the library to vault, the dir is /home/delegate thanks, Kevin On 2/11/06, Sebastian Redl <sebastian.redl@getdesigned.at> wrote:

Kevin Wan wrote:

...

i just want to share my library with others, if it helps.

This page shows the requirements and guidelines for Boost libraries: http://www.boost.org/more/lib_guide.htm

This page shows the submission process: http://www.boost.org/more/submission_process.htm

I suggest you upload the library to the vault and ask for comments then.

Does your delegate support multicasting? If not, comparing it to Signals is not fair - you should compare it to Function instead.

deliverNews = boost::bind(&NewsMessageArea::displayNews, newsMessageArea, _1);

If it does, how is the implementation easier? It is not because it only supports member functions - Function takes care of that part of Signals.

Sebastian Redl

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sorry, i forgot to delete the quotes. and btw, i'd like to give a simple example of my delegate implementation. example.cc #include <stdio.h> #include "delegate.h" const char* bar = "##########################################"; void native_func(int value) { printf("%s\n", bar); printf("native function, value = %d\n", value); } class Object { public: static void static_member_func(int value) { printf("%s\n", bar); printf("static member function, value = %d\n", value); } void non_const_member_func(int value) { printf("%s\n", bar); printf("non-const member function, value = %d\n", value); } void const_member_func(int value) const { printf("%s\n", bar); printf("const member function, value = %d\n", value); } }; class Functor { public: void operator()(int value) { printf("%s\n", bar); printf("non-const functor, value = %d\n", value); } }; class ConstFunctor { public: void operator()(int value) const { printf("%s\n", bar); printf("const functor, value = %d\n", value); } }; int main() { typedef wan::delegate<void(int)> MyDelegate; Object obj; Functor functor; ConstFunctor constFunctor; MyDelegate dele; dele.add(&native_func); dele.add(&Object::static_member_func); dele.add(&obj, &Object::non_const_member_func); dele.add(&obj, &Object::const_member_func); dele.add(&functor); dele.add(&constFunctor); dele(111); printf("%s\n", bar); printf("\n\nafter remove operations\n\n"); dele.remove(&native_func); dele.remove(&obj, &Object::non_const_member_func); dele(222); printf("%s\n", bar); printf("\n\nadd delegate object to delegate object\n\n"); MyDelegate temp; temp.add(&native_func); temp.add(&obj, &Object::non_const_member_func); dele.add(&temp); dele(333); printf("%s\n", bar); } $ g++ example.cc -o test $ ./test ########################################## native function, value = 111 ########################################## static member function, value = 111 ########################################## non-const member function, value = 111 ########################################## const member function, value = 111 ########################################## non-const functor, value = 111 ########################################## const functor, value = 111 ########################################## after remove operations ########################################## static member function, value = 222 ########################################## const member function, value = 222 ########################################## non-const functor, value = 222 ########################################## const functor, value = 222 ########################################## add delegate object to delegate object ########################################## static member function, value = 333 ########################################## const member function, value = 333 ########################################## non-const functor, value = 333 ########################################## const functor, value = 333 ########################################## native function, value = 333 ########################################## non-const member function, value = 333 ########################################## $ thanks, Kevin On 2/11/06, Martin Wille <mw8329@yahoo.com.au> wrote:

Kevin Wan wrote:

[lots of quoted text]

Please don't overquote and don't put quotes at the bottom of your message. See http://boost.org/more/discussion_policy.htm#effective

Regards, m Send instant messages to your online friends http://au.messenger.yahoo.com _______________________________________________ Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost

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