From: Tobias Schwinger (tschwinger_at_[hidden])
Date: 2007-09-15 09:22:39
Marco Costalba wrote:
> struct make_string
> {
> template<typename T, typename State>
> struct result
> {
> typedef std::string type;
> };
Seems the docs have not all been updated, yet.
This is the old result computation protocol. Today Fusion uses the
std::result_of convention.
In this case it's sufficient to replace the above code with
typedef std::string result_type;
For more complex result computation one can still use a nested 'result'
metafunction, but it's always unary now and invoked with the signature:
template< typename Signature >
struct result;
template< class Self, typename T0, typename T1 >
struct result< Self(T0,T1) >
{
typedef /*...*/ type;
};
Regards,
Tobias