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https://gitlab.alpinelinux.org/alpine/aports.git
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107 lines
3.0 KiB
Diff
107 lines
3.0 KiB
Diff
--- a/boost/parameter/aux_/maybe.hpp 2008-03-22 21:45:55.000000000 +0000
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+++ b/boost/parameter/aux_/maybe.hpp.new 2009-10-22 03:55:24.000000000 +0000
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@@ -2,20 +2,41 @@
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// subject to the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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-#ifndef BOOST_PARAMETER_MAYBE_060211_HPP
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-# define BOOST_PARAMETER_MAYBE_060211_HPP
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+//
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+// 2009.10.21 TDS remove depenency on boost::python::detail::referent_storage
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+//
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+#ifndef BOOST_PARAMETER_MAYBE_091021_HPP
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+# define BOOST_PARAMETER_MAYBE_091021_HPP
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# include <boost/mpl/if.hpp>
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# include <boost/mpl/identity.hpp>
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# include <boost/type_traits/is_reference.hpp>
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# include <boost/type_traits/add_reference.hpp>
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# include <boost/optional.hpp>
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-# include <boost/python/detail/referent_storage.hpp>
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+# include <boost/aligned_storage.hpp>
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# include <boost/type_traits/remove_cv.hpp>
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# include <boost/type_traits/add_const.hpp>
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namespace boost { namespace parameter { namespace aux {
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+template <class T> struct referent_size;
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+
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+template <class T>
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+struct referent_size<T&>
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+{
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+ BOOST_STATIC_CONSTANT(std::size_t, value = sizeof(T));
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+};
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+
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+// A metafunction returning a POD type which can store U, where T ==
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+// U&. If T is not a reference type, returns a POD which can store T.
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+template <class T>
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+struct referent_storage
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+{
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+ typedef typename boost::aligned_storage<
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+ referent_size<T>::value
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+ >::type type;
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+};
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+
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struct maybe_base {};
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template <class T>
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@@ -33,8 +54,8 @@
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BOOST_DEDUCED_TYPENAME remove_reference<reference>::type
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>::type non_cv_value;
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- explicit maybe(T value)
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- : value(value)
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+ explicit maybe(T value_)
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+ : value(value_)
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, constructed(false)
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{}
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@@ -48,28 +69,28 @@
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this->destroy();
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}
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- reference construct(reference value) const
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+ reference construct(reference value_) const
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{
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- return value;
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+ return value_;
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}
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template <class U>
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- reference construct2(U const& value) const
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+ reference construct2(U const& value_) const
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{
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- new (m_storage.bytes) non_cv_value(value);
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+ new (m_storage.address()) non_cv_value(value_);
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constructed = true;
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- return *(non_cv_value*)m_storage.bytes;
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+ return *(non_cv_value*)m_storage.address();
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}
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template <class U>
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- reference construct(U const& value) const
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+ reference construct(U const& value_) const
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{
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- return this->construct2(value);
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+ return this->construct2(value_);
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}
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void destroy()
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{
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- ((non_cv_value*)m_storage.bytes)->~non_cv_value();
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+ ((non_cv_value*)m_storage.address())->~non_cv_value();
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}
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typedef reference(maybe<T>::*safe_bool)() const;
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@@ -87,7 +108,9 @@
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private:
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boost::optional<T> value;
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mutable bool constructed;
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- mutable typename boost::python::detail::referent_storage<
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+
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+
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+ mutable typename referent_storage<
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reference
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>::type m_storage;
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};
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