Re: [boost] [POSSIBLE BUG] boost::fusion::fold des not work as advertised

From: Tobias Schwinger (tschwinger_at_[hidden])
Date: 2007-09-15 16:17:56

Marco Costalba wrote:
<snip errors>
> 
> The test now is:
> 
> struct make_string
> {
>    template<typename T, typename State>
>    struct result
>    {
>        typedef std::string result_type;
>    };
> 
>    template<typename T>
>    std::string operator()(const T& t, const std::string& str) const
>    {
>        return str + boost::lexical_cast<std::string>(t);
>    }
> };
> 

That's not what I meant. Don't just substitute the nested typedef but 
the whole metafunction:

    struct make_string
    {
        typedef std::string result_type;

...

Regards,
Tobias