diff options
Diffstat (limited to 'Eigen/src/Core/util/Meta.h')
-rw-r--r-- | Eigen/src/Core/util/Meta.h | 188 |
1 files changed, 96 insertions, 92 deletions
diff --git a/Eigen/src/Core/util/Meta.h b/Eigen/src/Core/util/Meta.h index 3d28680b6..56330db9b 100644 --- a/Eigen/src/Core/util/Meta.h +++ b/Eigen/src/Core/util/Meta.h @@ -26,6 +26,8 @@ #ifndef EIGEN_META_H #define EIGEN_META_H +namespace internal { + /** \internal * \file Meta.h * This file contains generic metaprogramming classes which are not specifically related to Eigen. @@ -33,72 +35,72 @@ * we however don't want to add a dependency to Boost. */ -struct ei_meta_true { enum { ret = 1 }; }; -struct ei_meta_false { enum { ret = 0 }; }; +struct meta_true { enum { ret = 1 }; }; +struct meta_false { enum { ret = 0 }; }; template<bool Condition, typename Then, typename Else> -struct ei_meta_if { typedef Then ret; }; +struct meta_if { typedef Then ret; }; template<typename Then, typename Else> -struct ei_meta_if <false, Then, Else> { typedef Else ret; }; - -template<typename T, typename U> struct ei_is_same_type { enum { ret = 0 }; }; -template<typename T> struct ei_is_same_type<T,T> { enum { ret = 1 }; }; - -template<typename T> struct ei_unref { typedef T type; }; -template<typename T> struct ei_unref<T&> { typedef T type; }; - -template<typename T> struct ei_unpointer { typedef T type; }; -template<typename T> struct ei_unpointer<T*> { typedef T type; }; -template<typename T> struct ei_unpointer<T*const> { typedef T type; }; - -template<typename T> struct ei_unconst { typedef T type; }; -template<typename T> struct ei_unconst<const T> { typedef T type; }; -template<typename T> struct ei_unconst<T const &> { typedef T & type; }; -template<typename T> struct ei_unconst<T const *> { typedef T * type; }; - -template<typename T> struct ei_cleantype { typedef T type; }; -template<typename T> struct ei_cleantype<const T> { typedef typename ei_cleantype<T>::type type; }; -template<typename T> struct ei_cleantype<const T&> { typedef typename ei_cleantype<T>::type type; }; -template<typename T> struct ei_cleantype<T&> { typedef typename ei_cleantype<T>::type type; }; -template<typename T> struct ei_cleantype<const T*> { typedef typename ei_cleantype<T>::type type; }; -template<typename T> struct ei_cleantype<T*> { typedef typename ei_cleantype<T>::type type; }; - -template<typename T> struct ei_is_arithmetic { enum { ret = false }; }; -template<> struct ei_is_arithmetic<float> { enum { ret = true }; }; -template<> struct ei_is_arithmetic<double> { enum { ret = true }; }; -template<> struct ei_is_arithmetic<long double> { enum { ret = true }; }; -template<> struct ei_is_arithmetic<bool> { enum { ret = true }; }; -template<> struct ei_is_arithmetic<char> { enum { ret = true }; }; -template<> struct ei_is_arithmetic<signed char> { enum { ret = true }; }; -template<> struct ei_is_arithmetic<unsigned char> { enum { ret = true }; }; -template<> struct ei_is_arithmetic<signed short> { enum { ret = true }; }; -template<> struct ei_is_arithmetic<unsigned short>{ enum { ret = true }; }; -template<> struct ei_is_arithmetic<signed int> { enum { ret = true }; }; -template<> struct ei_is_arithmetic<unsigned int> { enum { ret = true }; }; -template<> struct ei_is_arithmetic<signed long> { enum { ret = true }; }; -template<> struct ei_is_arithmetic<unsigned long> { enum { ret = true }; }; -template<> struct ei_is_arithmetic<signed long long> { enum { ret = true }; }; -template<> struct ei_is_arithmetic<unsigned long long> { enum { ret = true }; }; - -template<typename T> struct ei_makeconst { typedef const T type; }; -template<typename T> struct ei_makeconst<const T> { typedef const T type; }; -template<typename T> struct ei_makeconst<T&> { typedef const T& type; }; -template<typename T> struct ei_makeconst<const T&> { typedef const T& type; }; -template<typename T> struct ei_makeconst<T*> { typedef const T* type; }; -template<typename T> struct ei_makeconst<const T*> { typedef const T* type; }; - -template<typename T> struct ei_makeconst_return_type +struct meta_if <false, Then, Else> { typedef Else ret; }; + +template<typename T, typename U> struct is_same_type { enum { ret = 0 }; }; +template<typename T> struct is_same_type<T,T> { enum { ret = 1 }; }; + +template<typename T> struct unref { typedef T type; }; +template<typename T> struct unref<T&> { typedef T type; }; + +template<typename T> struct unpointer { typedef T type; }; +template<typename T> struct unpointer<T*> { typedef T type; }; +template<typename T> struct unpointer<T*const> { typedef T type; }; + +template<typename T> struct unconst { typedef T type; }; +template<typename T> struct unconst<const T> { typedef T type; }; +template<typename T> struct unconst<T const &> { typedef T & type; }; +template<typename T> struct unconst<T const *> { typedef T * type; }; + +template<typename T> struct cleantype { typedef T type; }; +template<typename T> struct cleantype<const T> { typedef typename cleantype<T>::type type; }; +template<typename T> struct cleantype<const T&> { typedef typename cleantype<T>::type type; }; +template<typename T> struct cleantype<T&> { typedef typename cleantype<T>::type type; }; +template<typename T> struct cleantype<const T*> { typedef typename cleantype<T>::type type; }; +template<typename T> struct cleantype<T*> { typedef typename cleantype<T>::type type; }; + +template<typename T> struct is_arithmetic { enum { ret = false }; }; +template<> struct is_arithmetic<float> { enum { ret = true }; }; +template<> struct is_arithmetic<double> { enum { ret = true }; }; +template<> struct is_arithmetic<long double> { enum { ret = true }; }; +template<> struct is_arithmetic<bool> { enum { ret = true }; }; +template<> struct is_arithmetic<char> { enum { ret = true }; }; +template<> struct is_arithmetic<signed char> { enum { ret = true }; }; +template<> struct is_arithmetic<unsigned char> { enum { ret = true }; }; +template<> struct is_arithmetic<signed short> { enum { ret = true }; }; +template<> struct is_arithmetic<unsigned short>{ enum { ret = true }; }; +template<> struct is_arithmetic<signed int> { enum { ret = true }; }; +template<> struct is_arithmetic<unsigned int> { enum { ret = true }; }; +template<> struct is_arithmetic<signed long> { enum { ret = true }; }; +template<> struct is_arithmetic<unsigned long> { enum { ret = true }; }; +template<> struct is_arithmetic<signed long long> { enum { ret = true }; }; +template<> struct is_arithmetic<unsigned long long> { enum { ret = true }; }; + +template<typename T> struct makeconst { typedef const T type; }; +template<typename T> struct makeconst<const T> { typedef const T type; }; +template<typename T> struct makeconst<T&> { typedef const T& type; }; +template<typename T> struct makeconst<const T&> { typedef const T& type; }; +template<typename T> struct makeconst<T*> { typedef const T* type; }; +template<typename T> struct makeconst<const T*> { typedef const T* type; }; + +template<typename T> struct makeconst_return_type { - typedef typename ei_meta_if<ei_is_arithmetic<T>::ret, T, typename ei_makeconst<T>::type>::ret type; + typedef typename meta_if<is_arithmetic<T>::ret, T, typename makeconst<T>::type>::ret type; }; /** \internal Allows to enable/disable an overload * according to a compile time condition. */ -template<bool Condition, typename T> struct ei_enable_if; +template<bool Condition, typename T> struct enable_if; -template<typename T> struct ei_enable_if<true,T> +template<typename T> struct enable_if<true,T> { typedef T type; }; /** \internal @@ -108,67 +110,67 @@ template<typename T> struct ei_enable_if<true,T> * upcoming next STL generation (using a templated result member). * If none of these members is provided, then the type of the first argument is returned. FIXME, that behavior is a pretty bad hack. */ -template<typename T> struct ei_result_of {}; +template<typename T> struct result_of {}; -struct ei_has_none {int a[1];}; -struct ei_has_std_result_type {int a[2];}; -struct ei_has_tr1_result {int a[3];}; +struct has_none {int a[1];}; +struct has_std_result_type {int a[2];}; +struct has_tr1_result {int a[3];}; -template<typename Func, typename ArgType, int SizeOf=sizeof(ei_has_none)> -struct ei_unary_result_of_select {typedef ArgType type;}; +template<typename Func, typename ArgType, int SizeOf=sizeof(has_none)> +struct unary_result_of_select {typedef ArgType type;}; template<typename Func, typename ArgType> -struct ei_unary_result_of_select<Func, ArgType, sizeof(ei_has_std_result_type)> {typedef typename Func::result_type type;}; +struct unary_result_of_select<Func, ArgType, sizeof(has_std_result_type)> {typedef typename Func::result_type type;}; template<typename Func, typename ArgType> -struct ei_unary_result_of_select<Func, ArgType, sizeof(ei_has_tr1_result)> {typedef typename Func::template result<Func(ArgType)>::type type;}; +struct unary_result_of_select<Func, ArgType, sizeof(has_tr1_result)> {typedef typename Func::template result<Func(ArgType)>::type type;}; template<typename Func, typename ArgType> -struct ei_result_of<Func(ArgType)> { +struct result_of<Func(ArgType)> { template<typename T> - static ei_has_std_result_type testFunctor(T const *, typename T::result_type const * = 0); + static has_std_result_type testFunctor(T const *, typename T::result_type const * = 0); template<typename T> - static ei_has_tr1_result testFunctor(T const *, typename T::template result<T(ArgType)>::type const * = 0); - static ei_has_none testFunctor(...); + static has_tr1_result testFunctor(T const *, typename T::template result<T(ArgType)>::type const * = 0); + static has_none testFunctor(...); // note that the following indirection is needed for gcc-3.3 enum {FunctorType = sizeof(testFunctor(static_cast<Func*>(0)))}; - typedef typename ei_unary_result_of_select<Func, ArgType, FunctorType>::type type; + typedef typename unary_result_of_select<Func, ArgType, FunctorType>::type type; }; -template<typename Func, typename ArgType0, typename ArgType1, int SizeOf=sizeof(ei_has_none)> -struct ei_binary_result_of_select {typedef ArgType0 type;}; +template<typename Func, typename ArgType0, typename ArgType1, int SizeOf=sizeof(has_none)> +struct binary_result_of_select {typedef ArgType0 type;}; template<typename Func, typename ArgType0, typename ArgType1> -struct ei_binary_result_of_select<Func, ArgType0, ArgType1, sizeof(ei_has_std_result_type)> +struct binary_result_of_select<Func, ArgType0, ArgType1, sizeof(has_std_result_type)> {typedef typename Func::result_type type;}; template<typename Func, typename ArgType0, typename ArgType1> -struct ei_binary_result_of_select<Func, ArgType0, ArgType1, sizeof(ei_has_tr1_result)> +struct binary_result_of_select<Func, ArgType0, ArgType1, sizeof(has_tr1_result)> {typedef typename Func::template result<Func(ArgType0,ArgType1)>::type type;}; template<typename Func, typename ArgType0, typename ArgType1> -struct ei_result_of<Func(ArgType0,ArgType1)> { +struct result_of<Func(ArgType0,ArgType1)> { template<typename T> - static ei_has_std_result_type testFunctor(T const *, typename T::result_type const * = 0); + static has_std_result_type testFunctor(T const *, typename T::result_type const * = 0); template<typename T> - static ei_has_tr1_result testFunctor(T const *, typename T::template result<T(ArgType0,ArgType1)>::type const * = 0); - static ei_has_none testFunctor(...); + static has_tr1_result testFunctor(T const *, typename T::template result<T(ArgType0,ArgType1)>::type const * = 0); + static has_none testFunctor(...); // note that the following indirection is needed for gcc-3.3 enum {FunctorType = sizeof(testFunctor(static_cast<Func*>(0)))}; - typedef typename ei_binary_result_of_select<Func, ArgType0, ArgType1, FunctorType>::type type; + typedef typename binary_result_of_select<Func, ArgType0, ArgType1, FunctorType>::type type; }; /** \internal In short, it computes int(sqrt(\a Y)) with \a Y an integer. - * Usage example: \code ei_meta_sqrt<1023>::ret \endcode + * Usage example: \code meta_sqrt<1023>::ret \endcode */ template<int Y, int InfX = 0, int SupX = ((Y==1) ? 1 : Y/2), bool Done = ((SupX-InfX)<=1 ? true : ((SupX*SupX <= Y) && ((SupX+1)*(SupX+1) > Y))) > // use ?: instead of || just to shut up a stupid gcc 4.3 warning -class ei_meta_sqrt +class meta_sqrt { enum { MidX = (InfX+SupX)/2, @@ -177,49 +179,51 @@ class ei_meta_sqrt NewSup = int(TakeInf) ? int(MidX) : SupX }; public: - enum { ret = ei_meta_sqrt<Y,NewInf,NewSup>::ret }; + enum { ret = meta_sqrt<Y,NewInf,NewSup>::ret }; }; template<int Y, int InfX, int SupX> -class ei_meta_sqrt<Y, InfX, SupX, true> { public: enum { ret = (SupX*SupX <= Y) ? SupX : InfX }; }; +class meta_sqrt<Y, InfX, SupX, true> { public: enum { ret = (SupX*SupX <= Y) ? SupX : InfX }; }; /** \internal determines whether the product of two numeric types is allowed and what the return type is */ -template<typename T, typename U> struct ei_scalar_product_traits; +template<typename T, typename U> struct scalar_product_traits; -template<typename T> struct ei_scalar_product_traits<T,T> +template<typename T> struct scalar_product_traits<T,T> { //enum { Cost = NumTraits<T>::MulCost }; typedef T ReturnType; }; -template<typename T> struct ei_scalar_product_traits<T,std::complex<T> > +template<typename T> struct scalar_product_traits<T,std::complex<T> > { //enum { Cost = 2*NumTraits<T>::MulCost }; typedef std::complex<T> ReturnType; }; -template<typename T> struct ei_scalar_product_traits<std::complex<T>, T> +template<typename T> struct scalar_product_traits<std::complex<T>, T> { //enum { Cost = 2*NumTraits<T>::MulCost }; typedef std::complex<T> ReturnType; }; -// FIXME quick workaround around current limitation of ei_result_of +// FIXME quick workaround around current limitation of result_of // template<typename Scalar, typename ArgType0, typename ArgType1> -// struct ei_result_of<ei_scalar_product_op<Scalar>(ArgType0,ArgType1)> { -// typedef typename ei_scalar_product_traits<typename ei_cleantype<ArgType0>::type, typename ei_cleantype<ArgType1>::type>::ReturnType type; +// struct result_of<scalar_product_op<Scalar>(ArgType0,ArgType1)> { +// typedef typename scalar_product_traits<typename cleantype<ArgType0>::type, typename cleantype<ArgType1>::type>::ReturnType type; // }; -template<typename T> struct ei_is_diagonal +template<typename T> struct is_diagonal { enum { ret = false }; }; -template<typename T> struct ei_is_diagonal<DiagonalBase<T> > +template<typename T> struct is_diagonal<DiagonalBase<T> > { enum { ret = true }; }; -template<typename T> struct ei_is_diagonal<DiagonalWrapper<T> > +template<typename T> struct is_diagonal<DiagonalWrapper<T> > { enum { ret = true }; }; -template<typename T, int S> struct ei_is_diagonal<DiagonalMatrix<T,S> > +template<typename T, int S> struct is_diagonal<DiagonalMatrix<T,S> > { enum { ret = true }; }; +} // end namespace internal + #endif // EIGEN_META_H |