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fixed a bug in stringstream and fstream << >> operators

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[SVN r13652]
This commit is contained in:
Jaakko Järvi
2002-05-03 19:13:48 +00:00
parent 2bdf3738c1
commit ec9ba2becf
1 changed files with 44 additions and 16 deletions
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60
include/boost/lambda/detail/operator_return_type_traits.hpp
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@@ -562,22 +562,17 @@ struct return_type_2<bitwise_action<Act>, A, B>
namespace detail {
#ifdef BOOST_NO_TEMPLATED_STREAMS
template<class A, class B>
struct leftshift_type {
typedef typename detail::IF<
#ifdef BOOST_NO_TEMPLATED_STREAMS
boost::is_convertible<
typename boost::remove_reference<A>::type*,
std::ostream*
>::value,
#else
is_instance_of_2<
typename boost::remove_reference<A>::type,
std::basic_ostream
>::value,
#endif
typename boost::add_reference<A>::type, //reference to the stream
std::ostream&,
typename detail::remove_reference_and_cv<A>::type
>::RET type;
};
@@ -586,22 +581,55 @@ template<class A, class B>
struct rightshift_type {
typedef typename detail::IF<
#ifdef BOOST_NO_TEMPLATED_STREAMS
boost::is_convertible<
typename boost::remove_reference<A>::type*,
std::istream*
>::value,
#else
is_instance_of_2<
typename boost::remove_reference<A>::type,
std::basic_istream
>::value,
#endif
typename boost::add_reference<A>::type, //reference to the stream
std::istream&,
typename detail::remove_reference_and_cv<A>::type
>::RET type;
};
#else
template <class T> struct get_ostream_type {
typedef std::basic_ostream<typename T::char_type,
typename T::traits_type>& type;
};
template <class T> struct get_istream_type {
typedef std::basic_istream<typename T::char_type,
typename T::traits_type>& type;
};
template<class A, class B>
struct leftshift_type {
private:
typedef typename boost::remove_reference<A>::type plainA;
public:
typedef typename detail::IF_type<
is_instance_of_2<plainA, std::basic_ostream>::value,
get_ostream_type<plainA>, //reference to the stream
detail::remove_reference_and_cv<A>
>::type type;
};
template<class A, class B>
struct rightshift_type {
private:
typedef typename boost::remove_reference<A>::type plainA;
public:
typedef typename detail::IF_type<
is_instance_of_2<plainA, std::basic_istream>::value,
get_istream_type<plainA>, //reference to the stream
detail::remove_reference_and_cv<A>
>::type type;
};
#endif
} // end detail
// ostream