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completes boost::result_of-based result type computation

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[SVN r38194]
This commit is contained in:
Tobias Schwinger
2007-07-12 09:08:46 +00:00
parent 046d853d63
commit 8eda5d32ca
16 changed files with 305 additions and 156 deletions
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94
include/boost/fusion/functional/adapter/detail/Attic/nullary_call_base.hpp
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@@ -26,43 +26,101 @@ namespace boost { namespace fusion { namespace detail
template<typename Function>
struct get_result_spec
{
typedef typename remove_const<typename remove_reference<Function>::type>::type function;
typedef typename function::template result<function(fusion::vector0)> type;
private:
typedef typename boost::remove_const<
typename boost::remove_reference<Function>::type>::type function;
typedef fusion::vector0 arg;
public:
typedef typename function::template result<function(arg)> call_0_result;
typedef typename function::template result<function const (arg)>
call_const_0_result;
};
template <class Derived, class Function, bool Enable = detail::has_type<
typename get_result_spec<Function>::type>::value>
template <class Derived, class Function,
bool EnableConst = detail::has_type<
typename get_result_spec<Function>::call_const_0_result>::value,
bool Enable = detail::has_type<
typename get_result_spec<Function>::call_0_result>::value>
struct nullary_call_base
{
template <typename T> inline void operator()(T reserved::*) const { }
protected:
typedef boost::blank r0;
};
typedef typename get_result_spec<Function>::call_const_0_result
call_const_0_result_class;
template <class Derived, class Function>
struct nullary_call_base<Derived,Function,true>
{
private:
typedef typename remove_const<typename remove_reference<Function>::type>::type function;
protected:
typedef typename function::template result<function(vector0)> r0;
typedef typename get_result_spec<Function>::call_0_result
call_0_result_class;
public:
typedef typename call_const_0_result_class::type
call_const_0_result;
inline typename r0::type
operator()() const
inline call_const_0_result operator()() const
{
fusion::vector0 arg;
return static_cast<Derived const *>(this)->fnc_transformed(arg);
}
inline typename r0::type
operator()()
typedef typename get_result_spec<Function>::call_0_result::type
call_0_result;
inline call_0_result operator()()
{
fusion::vector0 arg;
return static_cast<Derived *>(this)->fnc_transformed(arg);
}
};
template <class Derived, class Function>
struct nullary_call_base<Derived, Function, true, false>
{
protected:
typedef typename get_result_spec<Function>::call_const_0_result
call_const_0_result_class;
typedef typename boost::blank call_0_result_class;
public:
typedef typename call_const_0_result_class::type
call_const_0_result, call_0_result;
inline call_const_0_result operator()() const
{
fusion::vector0 arg;
return static_cast<Derived const *>(this)->fnc_transformed(arg);
}
};
template <class Derived, class Function>
struct nullary_call_base<Derived, Function, false, true>
{
protected:
typedef typename boost::blank call_const_0_result_class;
typedef typename get_result_spec<Function>::call_0_result
call_0_result_class;
public:
typedef void call_const_0_result;
typedef typename call_0_result_class::type call_0_result;
inline call_const_0_result operator()()
{
fusion::vector0 arg;
return static_cast<Derived *>(this)->fnc_transformed(arg);
}
};
template <class Derived, class Function>
struct nullary_call_base<Derived, Function, false, false>
{
protected:
typedef boost::blank call_0_result_class;
typedef boost::blank call_const_0_result_class;
public:
typedef void call_0_result;
typedef void call_const_0_result;
template <typename T> inline void operator()(T reserved::*) const { }
};
}}}
#endif