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//=========================================================================
// ProcessItem.hh
//
// We will employ a compile-time visitor pattern. The idea
// is to replace function calls (which are difficult to develop)
// with partial template specializations (which are relatively
// easy to develop).
//
// The call signature of the visitor will be
//
// bool InspectingVisitor<Arg1, Arg2, T, Stage>::process(
// const T&, Arg1&, Arg2*, const bool processClassId);
//
// or
//
// bool ModifyingVisitor<Arg1, Arg2, T, Stage>::process(
// T&, Arg1&, Arg2*, const bool processClassId);
//
// The processing will be terminated as soon as any call to
// the visitor's process function returns "false".
//
// I. Volobouev
// October 2010
//=========================================================================
#ifndef GENERS_PROCESSITEM_HH_
#define GENERS_PROCESSITEM_HH_
#include "Alignment/Geners/interface/IOTraits.hh"
#include "Alignment/Geners/interface/Int2Type.hh"
namespace gs {
// Special types to designate stages in container processing
struct InContainerHeader {
static const char *stage() { return "InContainerHeader"; }
};
struct InContainerSize {
static const char *stage() { return "InContainerSize"; }
};
struct InContainerFooter {
static const char *stage() { return "InContainerFooter"; }
};
struct InContainerCycle {
static const char *stage() { return "InContainerCycle"; }
};
struct InPODArray {
static const char *stage() { return "InPODArray"; }
};
} // namespace gs
// I am not aware of an easy way to have both const and non-const
// version of a template defined in the same code fragment. This is
// why you see some preprocessor tricks below -- the alternative
// of maintaining separate const and non-const codes is much worse.
#ifdef GENERS_GENERATE_CONST_IO_PROCESSOR
#undef GENERS_GENERATE_CONST_IO_PROCESSOR
#endif
//
// This is an internal header. Applications should NEVER use it directly.
//
#ifdef GENERS_GENERATED_IO_PROCESSOR
#undef GENERS_GENERATED_IO_PROCESSOR
#endif
#ifdef GENERS_GENERATED_IO_CONSTNESS
#undef GENERS_GENERATED_IO_CONSTNESS
#endif
#ifdef GENERS_CONTAINER_ITERATION_PROC
#undef GENERS_CONTAINER_ITERATION_PROC
#endif
#ifdef GENERS_GENERIC_ITEM_PROCESSOR
#undef GENERS_GENERIC_ITEM_PROCESSOR
#endif
#ifdef GENERS_GENERATE_CONST_IO_PROCESSOR
#define GENERS_GENERATED_IO_PROCESSOR ProcessItemLVL1
#define GENERS_GENERATED_IO_CONSTNESS const
#define GENERS_CONTAINER_ITERATION_PROC iterate_const_container
#define GENERS_GENERIC_ITEM_PROCESSOR process_const_item
#else
#define GENERS_GENERATED_IO_PROCESSOR ProcessItemLVL2
#define GENERS_GENERATED_IO_CONSTNESS
#define GENERS_CONTAINER_ITERATION_PROC iterate_container
#define GENERS_GENERIC_ITEM_PROCESSOR process_item
#endif
namespace gs {
namespace Private {
template <template <typename, typename, typename, typename> class Visitor,
typename T,
typename Arg1,
typename Arg2,
int Mode>
struct GENERS_GENERATED_IO_PROCESSOR;
}
} // namespace gs
namespace gs {
template <template <typename, typename, typename, typename> class Visitor, typename T, typename Arg1, typename Arg2>
bool GENERS_GENERIC_ITEM_PROCESSOR(GENERS_GENERATED_IO_CONSTNESS T &obj,
Arg1 &a1,
Arg2 *p2,
const bool processClassId) {
// The following works like a compile-time "switch" statement.
// This switch is too high level to be implemented using types,
// so we must do something like what is coded below.
typedef IOTraits<T> M;
return Private::GENERS_GENERATED_IO_PROCESSOR<
Visitor,
T,
Arg1,
Arg2,
M::Signature &(M::ISPOD | M::ISSTDCONTAINER | M::ISWRITABLE | M::ISPOINTER | M::ISSHAREDPTR | M::ISIOPTR |
M::ISPAIR | M::ISSTRING | M::ISTUPLE | M::ISEXTERNAL)>::process(obj, a1, p2, processClassId);
}
} // namespace gs
namespace gs {
namespace Private {
template <template <typename, typename, typename, typename> class Visitor, typename T, typename Arg1, typename Arg2>
struct GENERS_CONTAINER_ITERATION_PROC {
#ifdef GENERS_GENERATE_CONST_IO_PROCESSOR
static bool process(const T &v, Arg1 &a1, Arg2 *p2, std::size_t) {
bool itemStatus = true;
typename T::const_iterator end = v.end();
for (typename T::const_iterator it = v.begin(); it != end && itemStatus; ++it)
itemStatus = process_const_item<Visitor>(*it, a1, p2, false);
return itemStatus;
}
#else
static bool process(T &obj, Arg1 &a1, Arg2 *p2, const std::size_t newSize) {
bool itemStatus = true;
for (std::size_t i = 0; i < newSize && itemStatus; ++i)
itemStatus = Visitor<Arg1, Arg2, T, InContainerCycle>::process(obj, a1, p2, i);
return itemStatus;
}
#endif
};
template <template <typename, typename, typename, typename> class Visitor, typename T, typename Arg1, typename Arg2>
struct GENERS_GENERATED_IO_PROCESSOR<Visitor, T, Arg1, Arg2, IOTraits<int>::ISPOD> {
// POD-processing visitor
static bool process(GENERS_GENERATED_IO_CONSTNESS T &obj, Arg1 &a1, Arg2 *p2, const bool processClassId) {
return Visitor<Arg1, Arg2, T, Int2Type<IOTraits<int>::ISPOD>>::process(obj, a1, p2, processClassId);
}
};
template <template <typename, typename, typename, typename> class Visitor, typename T, typename Arg1, typename Arg2>
struct GENERS_GENERATED_IO_PROCESSOR<Visitor, T, Arg1, Arg2, IOTraits<int>::ISWRITABLE> {
// Processor of writable objects
static bool process(GENERS_GENERATED_IO_CONSTNESS T &obj, Arg1 &a1, Arg2 *p2, const bool processClassId) {
return Visitor<Arg1, Arg2, T, Int2Type<IOTraits<int>::ISWRITABLE>>::process(obj, a1, p2, processClassId);
}
};
template <template <typename, typename, typename, typename> class Visitor, typename T, typename Arg1, typename Arg2>
struct GENERS_GENERATED_IO_PROCESSOR<Visitor, T, Arg1, Arg2, IOTraits<int>::ISPOINTER> {
// There is not enough info here to decide how the pointer
// should be managed. Therefore, just call the visitor.
// However, turn on the class id writing because pointer
// usually signifies polymorphic class.
static bool process(GENERS_GENERATED_IO_CONSTNESS T &obj, Arg1 &a1, Arg2 *p2, bool /* processClassId */) {
return Visitor<Arg1, Arg2, T, Int2Type<IOTraits<int>::ISPOINTER>>::process(obj, a1, p2, true);
}
};
template <template <typename, typename, typename, typename> class Visitor, typename T, typename Arg1, typename Arg2>
struct GENERS_GENERATED_IO_PROCESSOR<Visitor, T, Arg1, Arg2, IOTraits<int>::ISIOPTR> {
// There is not enough info here to decide how the pointer
// should be managed. Therefore, just call the visitor.
// In this particular case, we are passing the "processClassId"
// value as is.
static bool process(GENERS_GENERATED_IO_CONSTNESS T &obj, Arg1 &a1, Arg2 *p2, const bool processClassId) {
return Visitor<Arg1, Arg2, typename T::element_type *, Int2Type<IOTraits<int>::ISPOINTER>>::process(
obj.getIOReference(), a1, p2, processClassId);
}
};
template <template <typename, typename, typename, typename> class Visitor, typename T, typename Arg1, typename Arg2>
struct GENERS_GENERATED_IO_PROCESSOR<Visitor, T, Arg1, Arg2, IOTraits<int>::ISSHAREDPTR> {
// There is not enough info here to decide how the shared pointer
// should be managed. Therefore, just call the visitor.
static bool process(GENERS_GENERATED_IO_CONSTNESS T &obj, Arg1 &a1, Arg2 *p2, bool /* processClassId */) {
return Visitor<Arg1, Arg2, T, Int2Type<IOTraits<int>::ISSHAREDPTR>>::process(obj, a1, p2, true);
}
};
template <template <typename, typename, typename, typename> class Visitor, typename T, typename Arg1, typename Arg2>
struct GENERS_GENERATED_IO_PROCESSOR<Visitor, T, Arg1, Arg2, IOTraits<int>::ISPAIR> {
static bool process(GENERS_GENERATED_IO_CONSTNESS T &obj, Arg1 &a1, Arg2 *p2, const bool processClassId) {
return Visitor<Arg1, Arg2, T, Int2Type<IOTraits<int>::ISPAIR>>::process(obj, a1, p2, processClassId);
}
};
template <template <typename, typename, typename, typename> class Visitor, typename T, typename Arg1, typename Arg2>
struct GENERS_GENERATED_IO_PROCESSOR<Visitor, T, Arg1, Arg2, IOTraits<int>::ISTUPLE> {
static bool process(GENERS_GENERATED_IO_CONSTNESS T &obj, Arg1 &a1, Arg2 *p2, const bool processClassId) {
return Visitor<Arg1, Arg2, T, Int2Type<IOTraits<int>::ISTUPLE>>::process(obj, a1, p2, processClassId);
}
};
template <template <typename, typename, typename, typename> class Visitor, typename T, typename Arg1, typename Arg2>
struct GENERS_GENERATED_IO_PROCESSOR<Visitor, T, Arg1, Arg2, IOTraits<int>::ISEXTERNAL> {
static bool process(GENERS_GENERATED_IO_CONSTNESS T &obj, Arg1 &a1, Arg2 *p2, const bool processClassId) {
return Visitor<Arg1, Arg2, T, Int2Type<IOTraits<int>::ISEXTERNAL>>::process(obj, a1, p2, processClassId);
}
};
template <template <typename, typename, typename, typename> class Visitor, typename T, typename Arg1, typename Arg2>
struct GENERS_GENERATED_IO_PROCESSOR<Visitor, T, Arg1, Arg2, IOTraits<int>::ISSTRING> {
static bool process(GENERS_GENERATED_IO_CONSTNESS T &obj, Arg1 &a1, Arg2 *p2, const bool processClassId) {
return Visitor<Arg1, Arg2, T, Int2Type<IOTraits<int>::ISSTRING>>::process(obj, a1, p2, processClassId);
}
};
// Processing of containers which do not support "write",
// "read" or "restore"
template <template <typename, typename, typename, typename> class Visitor, typename T, typename Arg1, typename Arg2>
struct GENERS_GENERATED_IO_PROCESSOR<Visitor, T, Arg1, Arg2, IOTraits<int>::ISSTDCONTAINER> {
private:
// The following function will be fired on containers which
// store PODs contiguously
static bool process2(
GENERS_GENERATED_IO_CONSTNESS T &obj, Arg1 &a1, Arg2 *p2, const bool processClassId, Int2Type<true>) {
return Visitor<Arg1, Arg2, T, InPODArray>::process(obj, a1, p2, processClassId);
}
// The following function will be fired on containers which
// do not not store PODs contiguously
static bool process2(
GENERS_GENERATED_IO_CONSTNESS T &v, Arg1 &a1, Arg2 *p2, const bool processClassId, Int2Type<false>) {
GENERS_GENERATED_IO_CONSTNESS std::size_t sz = v.size();
return Visitor<Arg1, Arg2, T, InContainerSize>::process(sz, a1, p2, processClassId) &&
GENERS_CONTAINER_ITERATION_PROC<Visitor, T, Arg1, Arg2>::process(v, a1, p2, sz) && sz == v.size();
}
public:
static bool process(GENERS_GENERATED_IO_CONSTNESS T &obj, Arg1 &a1, Arg2 *p2, const bool processClassId) {
if (Visitor<Arg1, Arg2, T, InContainerHeader>::process(obj, a1, p2, processClassId)) {
// Do generic container processing in case the container
// either does not have contiguous storage or its items
// are non-PODs. Otherwise do fast processing.
bool bodyStatus = true, footerStatus = true;
try {
bodyStatus = process2(obj,
a1,
p2,
processClassId,
Int2Type < IOTraits<typename T::value_type>::IsPOD && IOTraits<T>::IsContiguous > ());
} catch (...) {
footerStatus = Visitor<Arg1, Arg2, T, InContainerFooter>::process(obj, a1, p2, processClassId);
throw;
}
footerStatus = Visitor<Arg1, Arg2, T, InContainerFooter>::process(obj, a1, p2, processClassId);
return bodyStatus && footerStatus;
} else
return false;
}
};
} // namespace Private
} // namespace gs
#undef GENERS_GENERATED_IO_PROCESSOR
#undef GENERS_GENERATED_IO_CONSTNESS
#undef GENERS_CONTAINER_ITERATION_PROC
#undef GENERS_GENERIC_ITEM_PROCESSOR
#define GENERS_GENERATE_CONST_IO_PROCESSOR
//
// This is an internal header. Applications should NEVER use it directly.
//
#ifdef GENERS_GENERATED_IO_PROCESSOR
#undef GENERS_GENERATED_IO_PROCESSOR
#endif
#ifdef GENERS_GENERATED_IO_CONSTNESS
#undef GENERS_GENERATED_IO_CONSTNESS
#endif
#ifdef GENERS_CONTAINER_ITERATION_PROC
#undef GENERS_CONTAINER_ITERATION_PROC
#endif
#ifdef GENERS_GENERIC_ITEM_PROCESSOR
#undef GENERS_GENERIC_ITEM_PROCESSOR
#endif
#ifdef GENERS_GENERATE_CONST_IO_PROCESSOR
#define GENERS_GENERATED_IO_PROCESSOR ProcessItemLVL1
#define GENERS_GENERATED_IO_CONSTNESS const
#define GENERS_CONTAINER_ITERATION_PROC iterate_const_container
#define GENERS_GENERIC_ITEM_PROCESSOR process_const_item
#else
#define GENERS_GENERATED_IO_PROCESSOR ProcessItemLVL2
#define GENERS_GENERATED_IO_CONSTNESS
#define GENERS_CONTAINER_ITERATION_PROC iterate_container
#define GENERS_GENERIC_ITEM_PROCESSOR process_item
#endif
namespace gs {
namespace Private {
template <template <typename, typename, typename, typename> class Visitor,
typename T,
typename Arg1,
typename Arg2,
int Mode>
struct GENERS_GENERATED_IO_PROCESSOR;
}
} // namespace gs
namespace gs {
template <template <typename, typename, typename, typename> class Visitor, typename T, typename Arg1, typename Arg2>
bool GENERS_GENERIC_ITEM_PROCESSOR(GENERS_GENERATED_IO_CONSTNESS T &obj,
Arg1 &a1,
Arg2 *p2,
const bool processClassId) {
// The following works like a compile-time "switch" statement.
// This switch is too high level to be implemented using types,
// so we must do something like what is coded below.
typedef IOTraits<T> M;
return Private::GENERS_GENERATED_IO_PROCESSOR<
Visitor,
T,
Arg1,
Arg2,
M::Signature &(M::ISPOD | M::ISSTDCONTAINER | M::ISWRITABLE | M::ISPOINTER | M::ISSHAREDPTR | M::ISIOPTR |
M::ISPAIR | M::ISSTRING | M::ISTUPLE | M::ISEXTERNAL)>::process(obj, a1, p2, processClassId);
}
} // namespace gs
namespace gs {
namespace Private {
template <template <typename, typename, typename, typename> class Visitor, typename T, typename Arg1, typename Arg2>
struct GENERS_CONTAINER_ITERATION_PROC {
#ifdef GENERS_GENERATE_CONST_IO_PROCESSOR
static bool process(const T &v, Arg1 &a1, Arg2 *p2, std::size_t) {
bool itemStatus = true;
typename T::const_iterator end = v.end();
for (typename T::const_iterator it = v.begin(); it != end && itemStatus; ++it)
itemStatus = process_const_item<Visitor>(*it, a1, p2, false);
return itemStatus;
}
#else
static bool process(T &obj, Arg1 &a1, Arg2 *p2, const std::size_t newSize) {
bool itemStatus = true;
for (std::size_t i = 0; i < newSize && itemStatus; ++i)
itemStatus = Visitor<Arg1, Arg2, T, InContainerCycle>::process(obj, a1, p2, i);
return itemStatus;
}
#endif
};
template <template <typename, typename, typename, typename> class Visitor, typename T, typename Arg1, typename Arg2>
struct GENERS_GENERATED_IO_PROCESSOR<Visitor, T, Arg1, Arg2, IOTraits<int>::ISPOD> {
// POD-processing visitor
static bool process(GENERS_GENERATED_IO_CONSTNESS T &obj, Arg1 &a1, Arg2 *p2, const bool processClassId) {
return Visitor<Arg1, Arg2, T, Int2Type<IOTraits<int>::ISPOD>>::process(obj, a1, p2, processClassId);
}
};
template <template <typename, typename, typename, typename> class Visitor, typename T, typename Arg1, typename Arg2>
struct GENERS_GENERATED_IO_PROCESSOR<Visitor, T, Arg1, Arg2, IOTraits<int>::ISWRITABLE> {
// Processor of writable objects
static bool process(GENERS_GENERATED_IO_CONSTNESS T &obj, Arg1 &a1, Arg2 *p2, const bool processClassId) {
return Visitor<Arg1, Arg2, T, Int2Type<IOTraits<int>::ISWRITABLE>>::process(obj, a1, p2, processClassId);
}
};
template <template <typename, typename, typename, typename> class Visitor, typename T, typename Arg1, typename Arg2>
struct GENERS_GENERATED_IO_PROCESSOR<Visitor, T, Arg1, Arg2, IOTraits<int>::ISPOINTER> {
// There is not enough info here to decide how the pointer
// should be managed. Therefore, just call the visitor.
// However, turn on the class id writing because pointer
// usually signifies polymorphic class.
static bool process(GENERS_GENERATED_IO_CONSTNESS T &obj, Arg1 &a1, Arg2 *p2, bool /* processClassId */) {
return Visitor<Arg1, Arg2, T, Int2Type<IOTraits<int>::ISPOINTER>>::process(obj, a1, p2, true);
}
};
template <template <typename, typename, typename, typename> class Visitor, typename T, typename Arg1, typename Arg2>
struct GENERS_GENERATED_IO_PROCESSOR<Visitor, T, Arg1, Arg2, IOTraits<int>::ISIOPTR> {
// There is not enough info here to decide how the pointer
// should be managed. Therefore, just call the visitor.
// In this particular case, we are passing the "processClassId"
// value as is.
static bool process(GENERS_GENERATED_IO_CONSTNESS T &obj, Arg1 &a1, Arg2 *p2, const bool processClassId) {
return Visitor<Arg1, Arg2, typename T::element_type *, Int2Type<IOTraits<int>::ISPOINTER>>::process(
obj.getIOReference(), a1, p2, processClassId);
}
};
template <template <typename, typename, typename, typename> class Visitor, typename T, typename Arg1, typename Arg2>
struct GENERS_GENERATED_IO_PROCESSOR<Visitor, T, Arg1, Arg2, IOTraits<int>::ISSHAREDPTR> {
// There is not enough info here to decide how the shared pointer
// should be managed. Therefore, just call the visitor.
static bool process(GENERS_GENERATED_IO_CONSTNESS T &obj, Arg1 &a1, Arg2 *p2, bool /* processClassId */) {
return Visitor<Arg1, Arg2, T, Int2Type<IOTraits<int>::ISSHAREDPTR>>::process(obj, a1, p2, true);
}
};
template <template <typename, typename, typename, typename> class Visitor, typename T, typename Arg1, typename Arg2>
struct GENERS_GENERATED_IO_PROCESSOR<Visitor, T, Arg1, Arg2, IOTraits<int>::ISPAIR> {
static bool process(GENERS_GENERATED_IO_CONSTNESS T &obj, Arg1 &a1, Arg2 *p2, const bool processClassId) {
return Visitor<Arg1, Arg2, T, Int2Type<IOTraits<int>::ISPAIR>>::process(obj, a1, p2, processClassId);
}
};
template <template <typename, typename, typename, typename> class Visitor, typename T, typename Arg1, typename Arg2>
struct GENERS_GENERATED_IO_PROCESSOR<Visitor, T, Arg1, Arg2, IOTraits<int>::ISTUPLE> {
static bool process(GENERS_GENERATED_IO_CONSTNESS T &obj, Arg1 &a1, Arg2 *p2, const bool processClassId) {
return Visitor<Arg1, Arg2, T, Int2Type<IOTraits<int>::ISTUPLE>>::process(obj, a1, p2, processClassId);
}
};
template <template <typename, typename, typename, typename> class Visitor, typename T, typename Arg1, typename Arg2>
struct GENERS_GENERATED_IO_PROCESSOR<Visitor, T, Arg1, Arg2, IOTraits<int>::ISEXTERNAL> {
static bool process(GENERS_GENERATED_IO_CONSTNESS T &obj, Arg1 &a1, Arg2 *p2, const bool processClassId) {
return Visitor<Arg1, Arg2, T, Int2Type<IOTraits<int>::ISEXTERNAL>>::process(obj, a1, p2, processClassId);
}
};
template <template <typename, typename, typename, typename> class Visitor, typename T, typename Arg1, typename Arg2>
struct GENERS_GENERATED_IO_PROCESSOR<Visitor, T, Arg1, Arg2, IOTraits<int>::ISSTRING> {
static bool process(GENERS_GENERATED_IO_CONSTNESS T &obj, Arg1 &a1, Arg2 *p2, const bool processClassId) {
return Visitor<Arg1, Arg2, T, Int2Type<IOTraits<int>::ISSTRING>>::process(obj, a1, p2, processClassId);
}
};
// Processing of containers which do not support "write",
// "read" or "restore"
template <template <typename, typename, typename, typename> class Visitor, typename T, typename Arg1, typename Arg2>
struct GENERS_GENERATED_IO_PROCESSOR<Visitor, T, Arg1, Arg2, IOTraits<int>::ISSTDCONTAINER> {
private:
// The following function will be fired on containers which
// store PODs contiguously
static bool process2(
GENERS_GENERATED_IO_CONSTNESS T &obj, Arg1 &a1, Arg2 *p2, const bool processClassId, Int2Type<true>) {
return Visitor<Arg1, Arg2, T, InPODArray>::process(obj, a1, p2, processClassId);
}
// The following function will be fired on containers which
// do not not store PODs contiguously
static bool process2(
GENERS_GENERATED_IO_CONSTNESS T &v, Arg1 &a1, Arg2 *p2, const bool processClassId, Int2Type<false>) {
GENERS_GENERATED_IO_CONSTNESS std::size_t sz = v.size();
return Visitor<Arg1, Arg2, T, InContainerSize>::process(sz, a1, p2, processClassId) &&
GENERS_CONTAINER_ITERATION_PROC<Visitor, T, Arg1, Arg2>::process(v, a1, p2, sz) && sz == v.size();
}
public:
static bool process(GENERS_GENERATED_IO_CONSTNESS T &obj, Arg1 &a1, Arg2 *p2, const bool processClassId) {
if (Visitor<Arg1, Arg2, T, InContainerHeader>::process(obj, a1, p2, processClassId)) {
// Do generic container processing in case the container
// either does not have contiguous storage or its items
// are non-PODs. Otherwise do fast processing.
bool bodyStatus = true, footerStatus = true;
try {
bodyStatus = process2(obj,
a1,
p2,
processClassId,
Int2Type < IOTraits<typename T::value_type>::IsPOD && IOTraits<T>::IsContiguous > ());
} catch (...) {
footerStatus = Visitor<Arg1, Arg2, T, InContainerFooter>::process(obj, a1, p2, processClassId);
throw;
}
footerStatus = Visitor<Arg1, Arg2, T, InContainerFooter>::process(obj, a1, p2, processClassId);
return bodyStatus && footerStatus;
} else
return false;
}
};
} // namespace Private
} // namespace gs
#undef GENERS_GENERATED_IO_PROCESSOR
#undef GENERS_GENERATED_IO_CONSTNESS
#undef GENERS_CONTAINER_ITERATION_PROC
#undef GENERS_GENERIC_ITEM_PROCESSOR
#undef GENERS_GENERATE_CONST_IO_PROCESSOR
#endif // GENERS_PROCESSITEM_HH_
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