/
type_case.h
518 lines (475 loc) · 17.3 KB
/
type_case.h
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/*
* This software is distributed under BSD 3-clause license (see LICENSE file).
*
* Authors: Gil Hoben
*/
#ifndef SHOGUN_TYPE_CASE_H
#define SHOGUN_TYPE_CASE_H
#include <typeindex>
#include <unordered_map>
#include <shogun/lib/SGMatrix.h>
#include <shogun/lib/SGVector.h>
#include <shogun/lib/any.h>
#include <shogun/lib/sg_types.h>
using namespace shogun;
namespace shogun
{
typedef Types<
bool, char, int8_t, uint8_t, int16_t, uint16_t, int32_t, uint32_t,
int64_t, uint64_t, float32_t, float64_t, floatmax_t, SGVector<int32_t>,
SGVector<int64_t>, SGVector<float32_t>, SGVector<float64_t>,
SGVector<floatmax_t>, SGMatrix<int32_t>, SGMatrix<int64_t>,
SGMatrix<float32_t>, SGMatrix<float64_t>, SGMatrix<floatmax_t>>
SG_TYPES;
enum class TYPE
{
T_BOOL = 1,
T_CHAR = 2,
T_INT8 = 3,
T_UINT8 = 4,
T_INT16 = 5,
T_UINT16 = 6,
T_INT32 = 7,
T_UINT32 = 8,
T_INT64 = 9,
T_UINT64 = 10,
T_FLOAT32 = 11,
T_FLOAT64 = 12,
T_FLOATMAX = 13,
T_SGOBJECT = 14,
T_COMPLEX128 = 15,
T_SGVECTOR_FLOAT32 = 16,
T_SGVECTOR_FLOAT64 = 17,
T_SGVECTOR_FLOATMAX = 18,
T_SGVECTOR_INT32 = 19,
T_SGVECTOR_INT64 = 20,
T_SGMATRIX_FLOAT32 = 21,
T_SGMATRIX_FLOAT64 = 22,
T_SGMATRIX_FLOATMAX = 23,
T_SGMATRIX_INT32 = 24,
T_SGMATRIX_INT64 = 25,
T_UNDEFINED = 26
};
typedef std::unordered_map<std::type_index, TYPE> typemap;
namespace type_internal
{
template <typename T>
struct sg_type
{
};
template <typename T>
struct is_sg_primitive : public std::false_type
{
};
template <typename T>
struct is_sg_vector : public std::false_type
{
};
template <typename T>
struct is_sg_matrix : public std::false_type
{
};
template <typename T>
struct is_none : public std::false_type
{
};
template <>
struct is_none<None> : public std::true_type
{
};
#define SG_ADD_TYPE(T, type_) \
template <> \
struct sg_type<T> \
{ \
static constexpr TYPE ptype = type_; \
};
#define SG_ADD_PRIMITIVE_TYPE(T, type_) \
SG_ADD_TYPE(T, type_) \
template <> \
struct is_sg_primitive<T> : public std::true_type \
{ \
};
#define SG_ADD_SGVECTOR_TYPE(T, type_) \
SG_ADD_TYPE(T, type_) \
template <> \
struct is_sg_vector<T> : public std::true_type \
{ \
};
#define SG_ADD_SGMATRIX_TYPE(T, type_) \
SG_ADD_TYPE(T, type_) \
template <> \
struct is_sg_matrix<T> : public std::true_type \
{ \
};
SG_ADD_PRIMITIVE_TYPE(bool, TYPE::T_BOOL)
SG_ADD_PRIMITIVE_TYPE(char, TYPE::T_CHAR)
SG_ADD_PRIMITIVE_TYPE(int8_t, TYPE::T_INT8)
SG_ADD_PRIMITIVE_TYPE(uint8_t, TYPE::T_UINT8)
SG_ADD_PRIMITIVE_TYPE(int16_t, TYPE::T_INT16)
SG_ADD_PRIMITIVE_TYPE(uint16_t, TYPE::T_UINT16)
SG_ADD_PRIMITIVE_TYPE(int32_t, TYPE::T_INT32)
SG_ADD_PRIMITIVE_TYPE(uint32_t, TYPE::T_UINT32)
SG_ADD_PRIMITIVE_TYPE(int64_t, TYPE::T_INT64)
SG_ADD_PRIMITIVE_TYPE(uint64_t, TYPE::T_UINT64)
SG_ADD_PRIMITIVE_TYPE(float32_t, TYPE::T_FLOAT32)
SG_ADD_PRIMITIVE_TYPE(float64_t, TYPE::T_FLOAT64)
SG_ADD_PRIMITIVE_TYPE(floatmax_t, TYPE::T_FLOATMAX)
SG_ADD_PRIMITIVE_TYPE(complex128_t, TYPE::T_COMPLEX128)
SG_ADD_SGVECTOR_TYPE(SGVector<float32_t>, TYPE::T_SGVECTOR_FLOAT32)
SG_ADD_SGVECTOR_TYPE(SGVector<float64_t>, TYPE::T_SGVECTOR_FLOAT64)
SG_ADD_SGVECTOR_TYPE(SGVector<floatmax_t>, TYPE::T_SGVECTOR_FLOATMAX)
SG_ADD_SGVECTOR_TYPE(SGVector<int32_t>, TYPE::T_SGVECTOR_INT32)
SG_ADD_SGVECTOR_TYPE(SGVector<int64_t>, TYPE::T_SGVECTOR_INT64)
SG_ADD_SGMATRIX_TYPE(SGMatrix<float32_t>, TYPE::T_SGMATRIX_FLOAT32)
SG_ADD_SGMATRIX_TYPE(SGMatrix<float64_t>, TYPE::T_SGMATRIX_FLOAT64)
SG_ADD_SGMATRIX_TYPE(SGMatrix<floatmax_t>, TYPE::T_SGMATRIX_FLOATMAX)
SG_ADD_SGMATRIX_TYPE(SGMatrix<int32_t>, TYPE::T_SGMATRIX_INT32)
SG_ADD_SGMATRIX_TYPE(SGMatrix<int64_t>, TYPE::T_SGMATRIX_INT64)
#undef SG_ADD_TYPE
#undef SG_ADD_PRIMITIVE_TYPE
#undef SG_ADD_SGVECTOR_TYPE
#undef SG_ADD_SGMATRIX_TYPE
SG_FORCED_INLINE static std::string print_map(const typemap& map)
{
auto msg = std::string("<");
for (auto it : map)
{
msg += demangled_type(it.first.name());
msg += ", ";
}
msg.resize(msg.size() - 2);
msg += ">";
return msg;
}
SG_FORCED_INLINE static TYPE
get_type(const Any& any, const typemap& map)
{
auto type = std::type_index(any.type_info());
auto it = map.find(type);
return it == map.end() ? TYPE::T_UNDEFINED : (*it).second;
}
template <typename T>
struct wrong : std::false_type
{
};
struct ok
{
};
struct assert_return_type_is_valid
{
template <typename T = void>
assert_return_type_is_valid()
{
static_assert(
wrong<T>::value, "All lambda definitions must be void and "
"have the signature 'void f(auto value)'");
}
};
struct assert_arity_is_valid
{
template <typename T = void>
assert_arity_is_valid()
{
static_assert(
wrong<T>::value,
"All lambda definitions must have a single argument and "
"have the signature 'void f(auto value)'");
}
};
#ifndef DOXYGEN_SHOULD_SKIP_THIS
#if defined(_MSC_VER) && _MSC_VER < 1920
template <typename FunctorTraits>
using check_lambda_return = ok;
#else
template <typename FunctorTraits>
using check_lambda_return = std::conditional_t<
std::is_void<typename FunctorTraits::result_type>::value, ok,
assert_return_type_is_valid>;
#endif
#if defined(_MSC_VER) && _MSC_VER < 1920
template <typename FunctorTraits>
using check_lambda_arity = ok;
#else
template <typename FunctorTraits>
using check_lambda_arity = std::conditional_t<
FunctorTraits::arity == 1, ok, assert_arity_is_valid>;
#endif
#if defined(_MSC_VER) && _MSC_VER < 1920
template <typename F, typename... Args>
struct auto_function_traits
{
};
#else
template <typename F>
struct function_traits : function_traits<decltype(&F::operator())>
{
};
template <typename F, typename Ret, typename... Args>
struct function_traits<Ret (F::*)(Args...) const>
{
static constexpr int arity = sizeof...(Args);
typedef Ret result_type;
};
template <typename F, typename... Args>
struct auto_function_traits
: function_traits<decltype(&F::template operator()<Args...>)>
{
};
#endif
#endif // DOXYGEN_SHOULD_SKIP_THIS
template <typename T, typename FunctorT>
void final_function_execute(const Any& any, FunctorT func)
{
func(any_cast<T>(any));
}
template <typename T, typename Check, typename FunctorT>
auto
execute_function_check_return_type(Check, const Any& any, FunctorT func)
-> Check
{
}
template <typename T, typename FunctorT>
auto
execute_function_check_return_type(ok, const Any& any, FunctorT func)
-> decltype(final_function_execute<T>(any, func))
{
final_function_execute<T>(any, func);
}
template <typename T, typename TraitsT, typename FunctorT>
auto execute_function_check_arity(ok, const Any& any, FunctorT func)
-> decltype(execute_function_check_return_type<T>(
check_lambda_return<TraitsT>{}, any, func))
{
return execute_function_check_return_type<T>(
check_lambda_return<TraitsT>{}, any, func);
}
template <
typename T, typename TraitsT, typename Check, typename FunctorT>
auto execute_function_check_arity(Check, const Any& any, FunctorT func)
-> Check
{
}
template <typename T, typename Traits, typename FunctorT>
auto execute_function_checks(const Any& any, FunctorT func)
-> decltype(execute_function_check_arity<T, Traits>(
check_lambda_arity<Traits>{}, any, func))
{
execute_function_check_arity<T, Traits>(
check_lambda_arity<Traits>{}, any, func);
}
template <
typename T, typename Traits, typename Check, typename FunctorT>
auto execute_function_checks(const Any& any, FunctorT func) -> Check
{
}
template <
typename T, typename PrimitiveLambdaT, typename VectorLambdaT,
typename MatrixLambdaT,
typename traits = auto_function_traits<PrimitiveLambdaT, int>,
std::enable_if_t<
is_sg_primitive<T>::value &&
!is_none<PrimitiveLambdaT>::value>* = nullptr>
auto execute_function(
const Any& any, PrimitiveLambdaT primitive_func,
VectorLambdaT vector_func, MatrixLambdaT matrix_func)
-> decltype(execute_function_checks<T, traits>(any, primitive_func))
{
execute_function_checks<T, traits>(any, primitive_func);
}
template <
typename T, typename PrimitiveLambdaT, typename VectorLambdaT,
typename MatrixLambdaT,
typename traits =
auto_function_traits<VectorLambdaT, SGVector<int>>,
std::enable_if_t<
is_sg_vector<T>::value && !is_none<VectorLambdaT>::value>* =
nullptr>
auto execute_function(
const Any& any, PrimitiveLambdaT primitive_func,
VectorLambdaT vector_func, MatrixLambdaT matrix_func)
-> decltype(execute_function_checks<T, traits>(any, vector_func))
{
execute_function_checks<T, traits>(any, vector_func);
}
template <
typename T, typename PrimitiveLambdaT, typename VectorLambdaT,
typename MatrixLambdaT,
typename traits =
auto_function_traits<MatrixLambdaT, SGMatrix<int>>,
std::enable_if_t<
is_sg_matrix<T>::value && !is_none<MatrixLambdaT>::value>* =
nullptr>
auto execute_function(
const Any& any, PrimitiveLambdaT primitive_func,
VectorLambdaT vector_func, MatrixLambdaT matrix_func)
-> decltype(execute_function_checks<T, traits>(any, matrix_func))
{
execute_function_checks<T, traits>(any, matrix_func);
}
template <
typename T, typename PrimitiveLambdaT, typename VectorLambdaT,
typename MatrixLambdaT, typename traits = void,
std::enable_if_t<
(is_none<PrimitiveLambdaT>::value &&
is_sg_primitive<T>::value) ||
(is_none<VectorLambdaT>::value && is_sg_vector<T>::value) ||
(is_none<MatrixLambdaT>::value && is_sg_matrix<T>::value)>* =
nullptr>
auto execute_function(
const Any& any, PrimitiveLambdaT primitive_func,
VectorLambdaT vector_func, MatrixLambdaT matrix_func) -> void
{
io::warn(
"Ignoring Any dispatch call."
"sg_any_dispatch requires a lambda function definition "
"for the expected underlying type of Any ({}).",
demangled_type<T>().c_str());
}
template <
typename TypeList, typename PrimitiveLambdaT,
typename VectorLambdaT, typename MatrixLambdaT,
typename std::enable_if<std::is_same<
typename TypeList::Head, None>::value>::type* = nullptr>
auto sg_type_finder(
const Any& any, TYPE type, PrimitiveLambdaT primitive_func,
VectorLambdaT vector_func, MatrixLambdaT matrix_func) -> void
{
error(
"Unsupported type {}",
demangled_type(any.type_info().name()).c_str());
}
template <
typename TypeList, typename PrimitiveLambdaT,
typename VectorLambdaT, typename MatrixLambdaT,
typename std::enable_if<!std::is_same<
typename TypeList::Head, None>::value>::type* = nullptr>
auto sg_type_finder(
const Any& any, TYPE type, PrimitiveLambdaT primitive_func,
VectorLambdaT vector_func, MatrixLambdaT matrix_func)
-> decltype(execute_function<typename TypeList::Head>(
any, primitive_func, vector_func, matrix_func))
{
if (type == sg_type<typename TypeList::Head>::ptype)
{
execute_function<typename TypeList::Head>(
any, primitive_func, vector_func, matrix_func);
}
else
sg_type_finder<typename TypeList::Tail>(
any, type, primitive_func, vector_func, matrix_func);
}
} // namespace type_internal
#define ADD_TYPE_TO_MAP(TYPENAME, TYPE_ENUM) \
{std::type_index(typeid(TYPENAME)), TYPE_ENUM},
static const typemap sg_all_typemap = {
ADD_TYPE_TO_MAP(bool, TYPE::T_BOOL)
ADD_TYPE_TO_MAP(char, TYPE::T_CHAR)
ADD_TYPE_TO_MAP(int8_t, TYPE::T_INT8)
ADD_TYPE_TO_MAP(uint8_t, TYPE::T_UINT8)
ADD_TYPE_TO_MAP(int16_t , TYPE::T_INT16)
ADD_TYPE_TO_MAP(uint16_t , TYPE::T_UINT16)
ADD_TYPE_TO_MAP(int32_t , TYPE::T_INT32)
ADD_TYPE_TO_MAP(uint32_t , TYPE::T_UINT32)
ADD_TYPE_TO_MAP(int64_t , TYPE::T_INT64)
ADD_TYPE_TO_MAP(uint64_t , TYPE::T_UINT64)
ADD_TYPE_TO_MAP(float32_t , TYPE::T_FLOAT32)
ADD_TYPE_TO_MAP(float64_t , TYPE::T_FLOAT64)
ADD_TYPE_TO_MAP(floatmax_t , TYPE::T_FLOATMAX)
ADD_TYPE_TO_MAP(complex128_t, TYPE::T_COMPLEX128)
ADD_TYPE_TO_MAP(SGVector<float32_t>, TYPE::T_SGVECTOR_FLOAT32)
ADD_TYPE_TO_MAP(SGVector<float64_t>, TYPE::T_SGVECTOR_FLOAT64)
ADD_TYPE_TO_MAP(SGVector<floatmax_t>, TYPE::T_SGVECTOR_FLOATMAX)
ADD_TYPE_TO_MAP(SGVector<int32_t>, TYPE::T_SGVECTOR_INT32)
ADD_TYPE_TO_MAP(SGVector<int64_t>, TYPE::T_SGVECTOR_INT64)
ADD_TYPE_TO_MAP(SGMatrix<float32_t>, TYPE::T_SGMATRIX_FLOAT32)
ADD_TYPE_TO_MAP(SGMatrix<float64_t>, TYPE::T_SGMATRIX_FLOAT64)
ADD_TYPE_TO_MAP(SGMatrix<floatmax_t>, TYPE::T_SGMATRIX_FLOATMAX)
ADD_TYPE_TO_MAP(SGMatrix<int32_t>, TYPE::T_SGMATRIX_INT32)
ADD_TYPE_TO_MAP(SGMatrix<int64_t>, TYPE::T_SGMATRIX_INT64)
};
static const typemap sg_vector_typemap = {
ADD_TYPE_TO_MAP(SGVector<float32_t>, TYPE::T_SGVECTOR_FLOAT32)
ADD_TYPE_TO_MAP(SGVector<float64_t>, TYPE::T_SGVECTOR_FLOAT64)
ADD_TYPE_TO_MAP(SGVector<floatmax_t>, TYPE::T_SGVECTOR_FLOATMAX)
ADD_TYPE_TO_MAP(SGVector<int32_t>, TYPE::T_SGVECTOR_INT32)
ADD_TYPE_TO_MAP(SGVector<int64_t>, TYPE::T_SGVECTOR_INT64)
};
static const typemap sg_matrix_typemap = {
ADD_TYPE_TO_MAP(SGMatrix<float32_t>, TYPE::T_SGMATRIX_FLOAT32)
ADD_TYPE_TO_MAP(SGMatrix<float64_t>, TYPE::T_SGMATRIX_FLOAT64)
ADD_TYPE_TO_MAP(SGMatrix<floatmax_t>, TYPE::T_SGMATRIX_FLOATMAX)
ADD_TYPE_TO_MAP(SGMatrix<int32_t>, TYPE::T_SGMATRIX_INT32)
ADD_TYPE_TO_MAP(SGMatrix<int64_t>, TYPE::T_SGMATRIX_INT64)
};
static const typemap sg_non_complex_typemap = {
ADD_TYPE_TO_MAP(bool, TYPE::T_BOOL)
ADD_TYPE_TO_MAP(char, TYPE::T_CHAR)
ADD_TYPE_TO_MAP(int8_t, TYPE::T_INT8)
ADD_TYPE_TO_MAP(uint8_t, TYPE::T_UINT8)
ADD_TYPE_TO_MAP(int16_t , TYPE::T_INT16)
ADD_TYPE_TO_MAP(uint16_t , TYPE::T_UINT16)
ADD_TYPE_TO_MAP(int32_t , TYPE::T_INT32)
ADD_TYPE_TO_MAP(uint32_t , TYPE::T_UINT32)
ADD_TYPE_TO_MAP(int64_t , TYPE::T_INT64)
ADD_TYPE_TO_MAP(uint64_t , TYPE::T_UINT64)
ADD_TYPE_TO_MAP(float32_t , TYPE::T_FLOAT32)
ADD_TYPE_TO_MAP(float64_t , TYPE::T_FLOAT64)
ADD_TYPE_TO_MAP(floatmax_t , TYPE::T_FLOATMAX)
};
static const typemap sg_real_typemap = {
ADD_TYPE_TO_MAP(float32_t , TYPE::T_FLOAT32)
ADD_TYPE_TO_MAP(float64_t , TYPE::T_FLOAT64)
ADD_TYPE_TO_MAP(floatmax_t , TYPE::T_FLOATMAX)
};
static const typemap sg_non_integer_typemap = {
ADD_TYPE_TO_MAP(float32_t , TYPE::T_FLOAT32)
ADD_TYPE_TO_MAP(float64_t , TYPE::T_FLOAT64)
ADD_TYPE_TO_MAP(floatmax_t , TYPE::T_FLOATMAX)
ADD_TYPE_TO_MAP(complex128_t, TYPE::T_COMPLEX128)
};
#undef ADD_TYPE_TO_MAP
/** Checks the underlying type of an Any instance and
* executes the appropriate lambda. The type is checked
* against a typemap and if it isn't found there
* a ShogunException is thrown.
* The lambda function must have a specific signature,
* where it has one auto deduced argument. This argument is
* the any argument cast to its original type.
* @code
* auto f = [](auto value) {
* std::cout << value << std::endl;
* };
* @endcode
* The function accepts three lambda expressions for the cases where the
* type is scalar, SGVector or SGMatrix.
*
* @param any Any instance
* @param typesmap check the underlying type of Any given this map
* @param primitive_func lambda to execute if underlying type is a shogun
* primitive
* @param vector_func lambda to execute if underlying type is a SGVector
* @param matrix_func lambda to execute if underlying type is a SGMatrix
*/
template <
typename PrimitiveLambdaT = None, typename VectorLambdaT = None,
typename MatrixLambdaT = None>
auto sg_any_dispatch(
const Any& any, const typemap& typesmap,
PrimitiveLambdaT primitive_func = None{},
VectorLambdaT vector_func = None{}, MatrixLambdaT matrix_func = None{})
-> decltype(type_internal::sg_type_finder<SG_TYPES>(
any, type_internal::get_type(any, typesmap), primitive_func,
vector_func, matrix_func))
{
TYPE type = type_internal::get_type(any, typesmap);
if (type == TYPE::T_UNDEFINED)
error(
"Type {} is not part of {}",
demangled_type(any.type_info().name()).c_str(),
type_internal::print_map(typesmap).c_str());
else
type_internal::sg_type_finder<SG_TYPES>(
any, type, primitive_func, vector_func, matrix_func);
}
} // namespace shogun
#endif // SHOGUN_TYPE_CASE_H