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//
// immer: immutable data structures for C++
// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
//
// This software is distributed under the Boost Software License, Version 1.0.
// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
//
#include <boost/python.hpp>
#include <boost/python/suite/indexing/vector_indexing_suite.hpp>
#include <immer/vector.hpp>
#include <immer/refcount/unsafe_refcount_policy.hpp>
namespace {
struct heap_t
{
template <typename ...Tags>
static void* allocate(std::size_t size, Tags...)
{
return PyMem_Malloc(size);
}
template <typename ...Tags>
static void deallocate(std::size_t, void* obj, Tags...)
{
PyMem_Free(obj);
}
};
using memory_t = immer::memory_policy<
immer::unsafe_free_list_heap_policy<heap_t>,
immer::unsafe_refcount_policy>;
template <typename Vector>
struct immer_vector_indexing_suite : boost::python::vector_indexing_suite<
Vector, true, immer_vector_indexing_suite<Vector>>
{
using value_t = typename Vector::value_type;
using index_t = typename Vector::size_type;
using object_t = boost::python::object;
static void forbidden() { throw std::runtime_error{"immutable!"}; }
static void todo() { throw std::runtime_error{"TODO!"}; }
static const value_t& get_item(const Vector& v, index_t i) { return v[i]; }
static object_t get_slice(const Vector&, index_t, index_t) { todo(); }
static void set_item(const Vector&, index_t, const value_t&) { forbidden(); }
static void delete_item(const Vector&, index_t) { forbidden(); }
static void set_slice(const Vector&, index_t, index_t, const value_t&) { forbidden(); }
static void delete_slice(const Vector&, index_t, index_t) { forbidden(); }
template <typename Iter>
static void set_slice(const Vector&, index_t, index_t, Iter, Iter) { forbidden(); }
template <class Iter>
static void extend(const Vector& container, Iter, Iter) { forbidden(); }
};
} // anonymous namespace
BOOST_PYTHON_MODULE(immer_python_module)
{
using namespace boost::python;
using vector_t = immer::vector<object, memory_t>;
class_<vector_t>("Vector")
.def(immer_vector_indexing_suite<vector_t>())
.def("append",
+[] (const vector_t& v, object x) {
return v.push_back(std::move(x));
})
.def("set",
+[] (const vector_t& v, std::size_t i, object x) {
return v.set(i, std::move(x));
})
;
}
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