mirror of
https://github.com/pocketpy/pocketpy
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105 lines
3.1 KiB
C++
105 lines
3.1 KiB
C++
/***************************************************************************
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* Copyright (c) Johan Mabille, Sylvain Corlay and Wolf Vollprecht *
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* Copyright (c) QuantStack *
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* *
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* Distributed under the terms of the BSD 3-Clause License. *
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* *
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* The full license is in the file LICENSE, distributed with this software. *
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****************************************************************************/
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#ifndef XTENSOR_VECTORIZE_HPP
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#define XTENSOR_VECTORIZE_HPP
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#include <type_traits>
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#include <utility>
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#include "xfunction.hpp"
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#include "xutils.hpp"
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namespace xt
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{
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/***************
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* xvectorizer *
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***************/
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template <class F, class R>
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class xvectorizer
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{
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public:
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template <class... E>
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using xfunction_type = xfunction<F, xclosure_t<E>...>;
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template <class Func, class = std::enable_if_t<!std::is_same<std::decay_t<Func>, xvectorizer>::value>>
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xvectorizer(Func&& f);
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template <class... E>
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xfunction_type<E...> operator()(E&&... e) const;
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private:
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typename std::remove_reference<F>::type m_f;
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};
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namespace detail
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{
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template <class F>
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using get_function_type = remove_class_t<decltype(&std::remove_reference_t<F>::operator())>;
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}
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template <class R, class... Args>
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xvectorizer<R (*)(Args...), R> vectorize(R (*f)(Args...));
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template <class F, class R, class... Args>
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xvectorizer<F, R> vectorize(F&& f, R (*)(Args...));
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// Workaround for Visual Studio 15.7.1.
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// Error C2668 (ambiguous call to overloaded function) mistaking a declarations
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// for the definition of another overload.
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#ifndef _MSC_VER
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template <class F>
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auto vectorize(F&& f)
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-> decltype(vectorize(std::forward<F>(f), std::declval<detail::get_function_type<F>*>()));
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#endif
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/******************************
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* xvectorizer implementation *
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******************************/
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template <class F, class R>
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template <class Func, class>
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inline xvectorizer<F, R>::xvectorizer(Func&& f)
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: m_f(std::forward<Func>(f))
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{
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}
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template <class F, class R>
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template <class... E>
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inline auto xvectorizer<F, R>::operator()(E&&... e) const -> xfunction_type<E...>
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{
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return xfunction_type<E...>(m_f, std::forward<E>(e)...);
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}
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template <class R, class... Args>
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inline xvectorizer<R (*)(Args...), R> vectorize(R (*f)(Args...))
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{
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return xvectorizer<R (*)(Args...), R>(f);
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}
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template <class F, class R, class... Args>
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inline xvectorizer<F, R> vectorize(F&& f, R (*)(Args...))
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{
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return xvectorizer<F, R>(std::forward<F>(f));
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}
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template <class F>
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inline auto vectorize(F&& f)
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-> decltype(vectorize(std::forward<F>(f), std::declval<detail::get_function_type<F>*>()))
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{
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return vectorize(std::forward<F>(f), static_cast<detail::get_function_type<F>*>(nullptr));
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}
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}
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#endif
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