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49 lines
1.5 KiB
C++
49 lines
1.5 KiB
C++
/*
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pybind11/functional.h: std::function<> support
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Copyright (c) 2016 Wenzel Jakob <wenzel.jakob@epfl.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 "pybind11.h"
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#include <functional>
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NAMESPACE_BEGIN(pybind11)
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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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typedef typename std::conditional<std::is_same<Return, void>::value, void_type, Return>::type retval_type;
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public:
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bool load(handle src_, bool) {
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src_ = detail::get_function(src_);
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if (!src_ || !PyCallable_Check(src_.ptr()))
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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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gil_scoped_acquire acq;
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object retval(src(std::move(args)...));
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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 handle cast(Func &&f_, return_value_policy policy, handle /* parent */) {
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return cpp_function(std::forward<Func>(f_), policy).release();
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}
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PYBIND11_TYPE_CASTER(type, _("function<") +
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type_caster<std::tuple<Args...>>::name() + _(" -> ") +
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type_caster<retval_type>::name() +
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_(">"));
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};
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NAMESPACE_END(detail)
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NAMESPACE_END(pybind11)
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