type_traits.hpp File Reference

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Classes
struct	sig::impl::is_const< T >
struct	sig::impl::identity< T >
struct	sig::impl::has_iterator< C >
class	sig::impl::has_iterator< C >::Detect_iterator< T >

Namespaces
	sig
	sig::impl

Macros
#define	CREATE_MEMBER_DETECTOR(X)

Macro Definition Documentation

#define CREATE_MEMBER_DETECTOR

(

X

)

Value:

template<typename T> class Detect_##X {                                             \
    struct Fallback { int X; };                                                     \
    struct Derived : T, Fallback { };                                               \
                                                                                    \
    template<typename U, U> struct Check;                                           \
                                                                                    \
    typedef char ArrayOfOne[1];                                                     \
    typedef char ArrayOfTwo[2];                                                     \
                                                                                    \
    template<typename U> static ArrayOfOne & func(Check<int Fallback::*, &U::X> *); \
    template<typename U> static ArrayOfTwo & func(...);                             \
  public:                                                                           \
    typedef Detect_##X type;                                                        \
    enum { value = sizeof(func<Derived>(0)) == 2 };                                 \
};

Definition at line 20 of file type_traits.hpp.