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authorDongHun Kwak <dh0128.kwak@samsung.com>2017-09-13 11:24:46 +0900
committerDongHun Kwak <dh0128.kwak@samsung.com>2017-09-13 11:25:39 +0900
commit4fadd968fa12130524c8380f33fcfe25d4de79e5 (patch)
treefd26a490cd15388d42fc6652b3c5c13012e7f93e /boost/poly_collection/detail/callable_wrapper_iterator.hpp
parentb5c87084afaef42b2d058f68091be31988a6a874 (diff)
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Imported Upstream version 1.65.0upstream/1.65.0
Change-Id: Icf8400b375482cb11bcf77440a6934ba360d6ba4 Signed-off-by: DongHun Kwak <dh0128.kwak@samsung.com>
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+/* Copyright 2016 Joaquin M Lopez Munoz.
+ * Distributed under the Boost Software License, Version 1.0.
+ * (See accompanying file LICENSE_1_0.txt or copy at
+ * http://www.boost.org/LICENSE_1_0.txt)
+ *
+ * See http://www.boost.org/libs/poly_collection for library home page.
+ */
+
+#ifndef BOOST_POLY_COLLECTION_DETAIL_CALLABLE_WRAPPER_ITERATOR_HPP
+#define BOOST_POLY_COLLECTION_DETAIL_CALLABLE_WRAPPER_ITERATOR_HPP
+
+#if defined(_MSC_VER)
+#pragma once
+#endif
+
+#include <boost/iterator/iterator_adaptor.hpp>
+#include <type_traits>
+
+namespace boost{
+
+namespace poly_collection{
+
+namespace detail{
+
+/* callable_wrapper<Sig>* adaptor convertible to pointer to wrapped entity */
+
+template<typename CWrapper>
+class callable_wrapper_iterator:public boost::iterator_adaptor<
+ callable_wrapper_iterator<CWrapper>,CWrapper*
+>
+{
+public:
+ callable_wrapper_iterator()=default;
+ explicit callable_wrapper_iterator(CWrapper* p)noexcept:
+ callable_wrapper_iterator::iterator_adaptor_{p}{}
+ callable_wrapper_iterator(const callable_wrapper_iterator&)=default;
+ callable_wrapper_iterator& operator=(
+ const callable_wrapper_iterator&)=default;
+
+ template<
+ typename NonConstCWrapper,
+ typename std::enable_if<
+ std::is_same<CWrapper,const NonConstCWrapper>::value>::type* =nullptr
+ >
+ callable_wrapper_iterator(
+ const callable_wrapper_iterator<NonConstCWrapper>& x)noexcept:
+ callable_wrapper_iterator::iterator_adaptor_{x.base()}{}
+
+ template<
+ typename NonConstCWrapper,
+ typename std::enable_if<
+ std::is_same<CWrapper,const NonConstCWrapper>::value>::type* =nullptr
+ >
+ callable_wrapper_iterator& operator=(
+ const callable_wrapper_iterator<NonConstCWrapper>& x)noexcept
+ {
+ this->base_reference()=x.base();
+ return *this;
+ }
+
+ /* interoperability with CWrapper* */
+
+ callable_wrapper_iterator& operator=(CWrapper* p)noexcept
+ {this->base_reference()=p;return *this;}
+ operator CWrapper*()const noexcept{return this->base();}
+
+ /* interoperability with Callable* */
+
+ template<
+ typename Callable,
+ typename std::enable_if<
+ std::is_constructible<CWrapper,Callable&>::value&&
+ (!std::is_const<CWrapper>::value||std::is_const<Callable>::value)
+ >::type* =nullptr
+ >
+ explicit operator Callable*()const noexcept
+ {
+ return const_cast<Callable*>(
+ static_cast<const Callable*>(
+ const_cast<const void*>(
+ this->base()->data())));
+ }
+
+private:
+ template<typename>
+ friend class callable_wrapper_iterator;
+};
+
+} /* namespace poly_collection::detail */
+
+} /* namespace poly_collection */
+
+} /* namespace boost */
+
+#endif