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#pragma once
#include <torch/csrc/python_headers.h>
#include <ATen/ATen.h>
#include <pybind11/pybind11.h>
#include <pybind11/stl.h>
#include <torch/csrc/DynamicTypes.h>
#include <torch/csrc/autograd/python_variable.h>
#include <torch/csrc/utils/python_tuples.h>
#include <torch/csrc/utils/python_numbers.h>
#include <torch/csrc/Generator.h>
#include <stdexcept>
#include <utility>
namespace py = pybind11;
namespace pybind11 { namespace detail {
// torch.autograd.Variable <-> at::Tensor conversions (without unwrapping)
template <>
struct type_caster<at::Tensor> {
public:
PYBIND11_TYPE_CASTER(at::Tensor, _("at::Tensor"));
bool load(handle src, bool) {
PyObject* obj = src.ptr();
if (THPVariable_Check(obj)) {
value = reinterpret_cast<THPVariable*>(obj)->cdata;
return true;
}
return false;
}
static handle
cast(const at::Tensor& src, return_value_policy /* policy */, handle /* parent */) {
return handle(THPVariable_Wrap(torch::autograd::Variable(src)));
}
};
template <>
struct type_caster<at::Generator> {
public:
PYBIND11_TYPE_CASTER(at::Generator, _("at::Generator"));
bool load(handle src, bool) {
PyObject* obj = src.ptr();
if (THPGenerator_Check(obj)) {
value = reinterpret_cast<THPGenerator*>(obj)->cdata;
return true;
}
return false;
}
static handle
cast(const at::Generator& src, return_value_policy /* policy */, handle /* parent */) {
return handle(THPGenerator_Wrap(src));
}
};
template<> struct type_caster<at::IntArrayRef> {
public:
PYBIND11_TYPE_CASTER(at::IntArrayRef, _("at::IntArrayRef"));
bool load(handle src, bool) {
PyObject *source = src.ptr();
auto tuple = PyTuple_Check(source);
if (tuple || PyList_Check(source)) {
auto size = tuple ? PyTuple_GET_SIZE(source) : PyList_GET_SIZE(source);
v_value.resize(size);
for (int idx = 0; idx < size; idx++) {
PyObject* obj = tuple ? PyTuple_GET_ITEM(source, idx) : PyList_GET_ITEM(source, idx);
if (THPVariable_Check(obj)) {
v_value[idx] = THPVariable_Unpack(obj).item<int64_t>();
} else if (PyLong_Check(obj)) {
// use THPUtils_unpackLong after it is safe to include python_numbers.h
v_value[idx] = THPUtils_unpackLong(obj);
} else {
return false;
}
}
value = v_value;
return true;
}
return false;
}
static handle cast(at::IntArrayRef src, return_value_policy /* policy */, handle /* parent */) {
return handle(THPUtils_packInt64Array(src.size(), src.data()));
}
private:
std::vector<int64_t> v_value;
};
// Pybind11 bindings for our optional type.
// http://pybind11.readthedocs.io/en/stable/advanced/cast/stl.html#c-17-library-containers
template <typename T>
struct type_caster<c10::optional<T>> : optional_caster<c10::optional<T>> {};
}} // namespace pybind11::detail
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