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48 lines
2.5 KiB
Diff
48 lines
2.5 KiB
Diff
diff --git a/include/boost/variant/detail/apply_visitor_unary.hpp b/include/boost/variant/detail/apply_visitor_unary.hpp
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index 71610cb..c3a741e 100644
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--- a/include/boost/variant/detail/apply_visitor_unary.hpp
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+++ b/include/boost/variant/detail/apply_visitor_unary.hpp
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@@ -23,6 +23,7 @@
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# include <boost/mpl/size.hpp>
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# include <boost/utility/declval.hpp>
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# include <boost/core/enable_if.hpp>
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+# include <boost/type_traits/copy_cv_ref.hpp>
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# include <boost/type_traits/remove_reference.hpp>
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# include <boost/variant/detail/has_result_type.hpp>
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#endif
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@@ -85,7 +86,7 @@ namespace detail { namespace variant {
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// This class serves only metaprogramming purposes. none of its methods must be called at runtime!
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template <class Visitor, class Variant>
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struct result_multideduce1 {
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- typedef typename Variant::types types;
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+ typedef typename remove_reference<Variant>::type::types types;
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typedef typename boost::mpl::begin<types>::type begin_it;
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typedef typename boost::mpl::advance<
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begin_it, boost::mpl::int_<boost::mpl::size<types>::type::value - 1>
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@@ -95,14 +96,14 @@ struct result_multideduce1 {
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struct deduce_impl {
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typedef typename boost::mpl::next<It>::type next_t;
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typedef typename boost::mpl::deref<It>::type value_t;
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- typedef decltype(true ? boost::declval< Visitor& >()( boost::declval< value_t >() )
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+ typedef decltype(true ? boost::declval< Visitor& >()( boost::declval< copy_cv_ref_t< value_t, Variant > >() )
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: boost::declval< typename deduce_impl<next_t>::type >()) type;
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};
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template <class Dummy>
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struct deduce_impl<last_it, Dummy> {
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typedef typename boost::mpl::deref<last_it>::type value_t;
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- typedef decltype(boost::declval< Visitor& >()( boost::declval< value_t >() )) type;
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+ typedef decltype(boost::declval< Visitor& >()( boost::declval< copy_cv_ref_t< value_t, Variant > >() )) type;
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};
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typedef typename deduce_impl<begin_it>::type type;
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@@ -132,7 +133,7 @@ inline decltype(auto) apply_visitor(Visitor&& visitor, Visitable&& visitable,
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boost::detail::variant::has_result_type<Visitor>
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>::type* = 0)
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{
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- boost::detail::variant::result_wrapper1<Visitor, typename remove_reference<Visitable>::type> cpp14_vis(::boost::forward<Visitor>(visitor));
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+ boost::detail::variant::result_wrapper1<Visitor, Visitable> cpp14_vis(::boost::forward<Visitor>(visitor));
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return ::boost::forward<Visitable>(visitable).apply_visitor(cpp14_vis);
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}
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