vcl_config_compiler.h.in

InsightToolkit-1.4.0(有大量的优化算法程序)

#define VCL_UNINSTANTIATE_SPECIALIZATION(symbol) // which compiler needs this ?


//: VCL_UNINSTANTIATE_UNSEEN_SPECIALIZATION(symbol)
//
// gcc is sensible about specializations if it has seen the definition,
// but if it's in another file, need to use extern to tell it.
// \code
//      VCL_UNINSTANTIATE_UNSEEN_SPECIALIZATION(int T::specialized_method())
// \endcode
// It should be placed before the "template class A<T>;"

//#define VCL_UNINSTANTIATE_UNSEEN_SPECIALIZATION(symbol) extern symbol;
//#define VCL_UNINSTANTIATE_UNSEEN_SPECIALIZATION(symbol) /* no need */
//FIXME #define VCL_UNINSTANTIATE_UNSEEN_SPECIALIZATION(symbol) @VCL_UNINSTANTIATE_UNSEEN_SPECIALIZATION@
#define VCL_UNINSTANTIATE_UNSEEN_SPECIALIZATION(symbol) /* never used */


//: VCL_INSTANTIATE_STATIC_TEMPLATE_MEMBER(symbol)
//
// Some compilers (e.g. gcc 2.7.2) do not accept a templated definition
// of static members, as in
// \code
//   template <class T>
//   struct A {
//     A() { }
//     static char *fmt;
//   };
//
//   template <class T>
//   char *A<T>::fmt = 0;
//
//   template struct A<int>;
// \endcode
// The way round this is to supply an explicit definition for every
// instance of the class needed.
//
// Put the templated definition like this
// \code
//      #if VCL_CAN_DO_STATIC_TEMPLATE_MEMBER
//      template <class T>
//      char *A<T>::fmt = 0;
//      #endif
// \endcode
// and place
// \code
//      VCL_INSTANTIATE_STATIC_TEMPLATE_MEMBER(int A<int>::fmt = 0)
// \endcode
// before the
// \code
//      template class A<int>;
// \endcode
// with
// \code
//      VCL_UNINSTANTIATE_STATIC_TEMPLATE_MEMBER(A<int>::var)
// \endcode
// afterwards.

//#define VCL_INSTANTIATE_STATIC_TEMPLATE_MEMBER(symbol) /* no need */
//#define VCL_INSTANTIATE_STATIC_TEMPLATE_MEMBER(symbol) symbol;
//
#define VCL_CAN_DO_STATIC_TEMPLATE_MEMBER @VCL_CAN_DO_STATIC_TEMPLATE_MEMBER@
#if VCL_CAN_DO_STATIC_TEMPLATE_MEMBER
# define VCL_INSTANTIATE_STATIC_TEMPLATE_MEMBER(symbol)   /* */
# define VCL_UNINSTANTIATE_STATIC_TEMPLATE_MEMBER(symbol) /* */
#else
# define VCL_INSTANTIATE_STATIC_TEMPLATE_MEMBER(symbol) symbol;
# define VCL_UNINSTANTIATE_STATIC_TEMPLATE_MEMBER(symbol) // which compiler needs this ?
#endif


//: VCL_CAN_DO_NON_TYPE_FUNCTION_TEMPLATE_PARAMETER
//
// Some compilers (e.g. SunPro 5.0) do not accept non-type template
// parameters in function templates. E.g.
// \code
// template <class T, int n> struct vicky { T data[n]; } // can do
//
// template <class T, int n>
// void a_function_template(vicky<T, n> const &) { ... } // cannot
// \endcode
#define VCL_CAN_DO_NON_TYPE_FUNCTION_TEMPLATE_PARAMETER @VCL_CAN_DO_NON_TYPE_FUNCTION_TEMPLATE_PARAMETER@


//----------------------------------------------------------------------
// overload resolution problems.

//: VCL_NEED_FRIEND_FOR_TEMPLATE_OVERLOAD
//
// On some compilers (in particular gcc 2.7.2.3), the compiler doesn't
// know how to cast a templated derived class to a templated base class
// (eg. vnl_matrix_fixed<3,3,double> -> vnl_matrix<double>) when doing overload
// resolution. Making the overloaded function a friend of the class makes
// the problem go away.
//
// True if the compiler needs this hack.

//#define VCL_NEED_FRIEND_FOR_TEMPLATE_OVERLOAD 0
//#define VCL_NEED_FRIEND_FOR_TEMPLATE_OVERLOAD 1
#define VCL_NEED_FRIEND_FOR_TEMPLATE_OVERLOAD @VCL_NEED_FRIEND_FOR_TEMPLATE_OVERLOAD@


//: VCL_OVERLOAD_CAST
//
// Some compilers (gcc 2.7.2.3 and SGI native 6.0) often won't perform
// certain implicit casts. E.g. casting a templated derived class to a
// templated base class (see above), or even realizing that
// "template void foo(float const * const *, float * const *, int, int)"
// can be called with parameters of type "(float **, float **, int, int)".
//
//   To fix the code, it is tempting to add an explicit cast and get on
// with things, but that would throw away the checking performed by more
// helpful compilers. Use VCL_OVERLOAD_CAST instead.

//#define VCL_OVERLOAD_CAST(T, x) ((T)(x))
//#define VCL_OVERLOAD_CAST(T, x) (x)
#define VCL_OVERLOAD_CAST(T, x) @VCL_OVERLOAD_CAST@


//----------------------------------------------------------------------
// stuff


//: VCL_NO_STATIC_DATA_MEMBERS
//
// True if compiler does not support static data members in template classes.
//
#define VCL_NO_STATIC_DATA_MEMBERS @VCL_NO_STATIC_DATA_MEMBERS@


//: VCL_HAS_TEMPLATE_SYMBOLS
//
// True if the compiler mangles function template instances differently
// from non-templated functions with the same name and signature.
// This is correct behaviour.
//
#define VCL_HAS_TEMPLATE_SYMBOLS @VCL_HAS_TEMPLATE_SYMBOLS@


//----------------------------------------------------------------------
// default template arguments

//: VCL_DEFAULT_TMPL_ARG(arg)
//
// It is wrong to provide a default for a template parameter in two
// declarations in the same scope (14.1.12), e.g.
// \code
//   template <class S, class T = int> class X;
//   template <class S, class T = int> class X { /* ... */ };
// \endcode
// is wrong.
// However, some older compilers insist on seeing the default argument
// again when defining a class body or instantiating.
// To satisfy them, use this macro as follows :
// \code
//   template <class S, class T VCL_DEFAULT_TMPL_ARG(= int)> X { /* ... */ };
//   template X<double VCL_DEFAULT_TMPL_ARG(, int)>;
// \endcode
//
// It's possible we need two macros, one for redeclaration and
// one for instantiation.

//#define VCL_DEFAULT_TMPL_ARG(arg) /* no need */
//#define VCL_DEFAULT_TMPL_ARG(arg) arg
#define VCL_DEFAULT_TMPL_ARG(arg) @VCL_DEFAULT_TMPL_ARG@

//
#define VCL_CAN_DO_COMPLETE_DEFAULT_TYPE_PARAMETER @VCL_CAN_DO_COMPLETE_DEFAULT_TYPE_PARAMETER@
#define VCL_CAN_DO_TEMPLATE_DEFAULT_TYPE_PARAMETER @VCL_CAN_DO_TEMPLATE_DEFAULT_TYPE_PARAMETER@

// VCL_DFL_TYPE_PARAM_STLDECL(A, a) and VCL_DFL_TMPL_PARAM_STLDECL(A, a)
// EGCS doesn't like definition of default types, viz:
//   template <class A = default> class vector;
//   template <class A = default> class vector { ... };
// This macro is used to say "define if not previously defined, like
//   template <VCL_DFL_TYPE_PARAM_STLDECL(A,a)> class vector { ... };

//#define VCL_DFL_TYPE_PARAM_STLDECL(A,a) A = a
//#define VCL_DFL_TYPE_PARAM_STLDECL(A,a) A /* = a */
//#define VCL_DFL_TYPE_PARAM_STLDECL(A,a) __DFL_TYPE_PARAM(A,a)
//FIXME #define VCL_DFL_TYPE_PARAM_STLDECL(A,a) @VCL_DFL_TYPE_PARAM_STLDECL@
//
//#define VCL_DFL_TMPL_PARAM_STLDECL(A,a) A = a
//#define VCL_DFL_TMPL_PARAM_STLDECL(A,a) A /* = a */
//#define VCL_DFL_TMPL_PARAM_STLDECL(A,a) __STL_DFL_TMPL_PARAM(A,a)
//FIXME #define VCL_DFL_TMPL_PARAM_STLDECL(A,a) @VCL_DFL_TMPL_PARAM_STLDECL@


// VCL_DFL_TMPL_ARG(class)
// Similarly, when instantiating a templated class with a default
// template argument, some compilers don't like the redeclaration of
// that argument, while others insist on it.
// In such cases, specify the default argument as follows:
//   template class vector <int VCL_DFL_TMPL_ARG(default_iterator) >;
// (Note the missing comma after int: it is inside the macro.)

//#define VCL_DFL_TMPL_ARG(classname) , classname
//#define VCL_DFL_TMPL_ARG(classname) /* , classname */
//#define VCL_DFL_TMPL_ARG(classname) __DFL_TMPL_ARG(classname)
//FIXME #define VCL_DFL_TMPL_ARG(classname) @VCL_DFL_TMPL_ARG@


//: VCL_SUNPRO_CLASS_SCOPE_HACK(A)
//
// Nice one.  Can't use std::vector<T> in a class on SunPro 5, must use
// std::vector<T, std::allocator<T> >.  Of course, we cannot expect that other
// compilers call the default allocator std::allocator<T>, so we must use
// a macro.  I could call it something generic, like
// VCL_CLASS_SCOPE_HACK, but to be honest, it's a sunpro problem,
// they deserve the blame.
// Usage (the comma is inside the macro) :
// \code
//    vector<T VCL_SUNPRO_CLASS_SCOPE_HACK(std::allocator<T >)>
// \endcode

//#define VCL_SUNPRO_CLASS_SCOPE_HACK(A) /* , A */
//#define VCL_SUNPRO_CLASS_SCOPE_HACK(A) , A
#define VCL_SUNPRO_CLASS_SCOPE_HACK(A) @VCL_SUNPRO_CLASS_SCOPE_HACK@


//----------------------------------------------------------------------
// exception and namespace issues


//: VCL_HAS_EXCEPTIONS
// Set to true if the compiler supports the use of exceptions.
#define VCL_HAS_EXCEPTIONS @VCL_HAS_EXCEPTIONS@


//: VCL_HAS_NAMESPACES
// Set to true if the compiler supports the use of namespaces.
#define VCL_HAS_NAMESPACES @VCL_HAS_NAMESPACES@


//: VCL_ALLOWS_NAMESPACE_STD
// Set to true if the compiler allows namespace std:: for the standard library.
#define VCL_ALLOWS_NAMESPACE_STD @VCL_ALLOWS_NAMESPACE_STD@


//: VCL_NEEDS_NAMESPACE_STD
// Set to true if the compiler needs namespace std:: for the standard library.
#define VCL_NEEDS_NAMESPACE_STD @VCL_NEEDS_NAMESPACE_STD@

//----------------------------------------------------------------------

// architecture macros removed -- they're not in the C++ standard

#endif // vcl_config_compiler_h_