Re: [boost] Formal Review Request: Boost.Convert

Subject: Re: [boost] Formal Review Request: Boost.Convert
From: Andrey Semashev (andrey.semashev_at_[hidden])
Date: 2009-02-24 17:09:38

Emil Dotchevski wrote:

> Andrey, a question: let's say I am the author of a uuid type, something like:
> 
> struct uuid
> {
>   unsigned char value_[16];
> };
> 
> How do I integrate that type in the proposed convert framework, so it
> can be converted to std::string? I have a basic understanding, but I
> wanted to see a clear picture of only the things relevant to defining
> a conversion (as opposed to using it.)

With the code snippet I attached it should look something like this:

   struct uuid_to_string_tag {};

   template< typename ToT >
   typename enable_if<
       is_string< ToT >,
       uuid_to_string_tag
   >::type get_conversion_tag(uuid*, ToT*);

   template< >
   struct converter_impl< uuid, uuid_to_string_tag >
   {
       typedef uuid result_type;

       template< typename ArgsT >
       result_type operator() (ArgsT const& args) const;
   };

The operator() will contain the conversion code.