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52 lines
1.5 KiB
C++
52 lines
1.5 KiB
C++
/*
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pybind/functional.h: std::function<> support
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Copyright (c) 2015 Wenzel Jakob <wenzel@inf.ethz.ch>
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All rights reserved. Use of this source code is governed by a
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BSD-style license that can be found in the LICENSE file.
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*/
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#pragma once
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#include <pybind/pybind.h>
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#include <functional>
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NAMESPACE_BEGIN(pybind)
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NAMESPACE_BEGIN(detail)
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template <typename Return, typename... Args> struct type_caster<std::function<Return(Args...)>> {
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typedef std::function<Return(Args...)> type;
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public:
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bool load(PyObject *src_, bool) {
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if (!PyFunction_Check(src_))
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return false;
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object src(src_, true);
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value = [src](Args... args) -> Return {
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object retval(pybind::handle(src).call(std::move(args)...));
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if (retval.ptr() == nullptr && PyErr_Occurred())
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throw error_already_set();
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/* Visual studio 2015 parser issue: need parentheses around this expression */
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return (retval.template cast<Return>());
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};
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return true;
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}
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template <typename Func>
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static PyObject *cast(Func &&f_, return_value_policy policy, PyObject *) {
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cpp_function f(std::forward<Func>(f_), policy);
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f.inc_ref();
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return f.ptr();
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}
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PYBIND_TYPE_CASTER(type, detail::descr("function<") +
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type_caster<std::tuple<Args...>>::name() + detail::descr(" -> ") +
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type_caster<typename decay<Return>::type>::name() +
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detail::descr(">"));
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};
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NAMESPACE_END(detail)
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NAMESPACE_END(pybind)
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