Re: [boost] Re: MPL usage for code generation

From: David Abrahams (dave_at_[hidden])
Date: 2003-01-24 21:32:04

"Joel de Guzman" <djowel_at_[hidden]> writes:

> ----- Original Message ----- 
> From: "Aleksey Gurtovoy" <agurtovoy_at_[hidden]>
>
>
>> Joel de Guzman wrote:
>> > Here's the Phoenix version:
>> > 
>> >     struct my_function_
>> >     {
>> > 
>> >         template <typename Arg1T, typename Arg2T>
>> >         struct result { typedef void type; };
>> > 
>> >         template< typename U >
>> >         void operator()(std::string const& text, U)
>> >         {
>> >             // ...
>> >         }
>> > 
>> >     };
>> > 
>> >     function<my_function_> my_function; // here!
>> > 
>> > Then:
>> > 
>> >     mpl::for_each< my_types >(my_function(text, _1));
>> 
>> This is way too cool! Now we only need to provide such free-standing forms
>> of all STL algorithms/member functions, and we will be living in a different
>> world:
>> 
>>     std::vector<std::string> v;
>> 
>>     push_back(v, "text"); // plain call    
>>     for_each(input, push_back(v, _1)); // currying
>>     for_each(v, for_each(_1, print_char)); // more currying
>>     // etc.!
>> 
>> Breathtaking, IMO.
>
> That was my intent. 

I'd like you to take my breath, too, but I'm not as quick as Aleksey.
I tried to compile your code but I couldn't come up with a plausible
definition for function<...>.  Could you fill in some details?

-- 
                       David Abrahams
   dave_at_[hidden] * http://www.boost-consulting.com
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