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Fix stream detection in op<<, op>>

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This commit is contained in:
Peter Dimov
2021-09-05 03:06:33 +03:00
parent d6389b60f5
commit 08b40af530
1 changed files with 6 additions and 4 deletions
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10
include/boost/lambda2/lambda2.hpp
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@@ -152,6 +152,8 @@ template<class A> using enable_unary_lambda =
template<class A, class B> using enable_binary_lambda =
std::enable_if_t<is_lambda_expression<A>::value || is_lambda_expression<B>::value>;
template<class T> using is_stream = std::is_base_of<std::ios_base, remove_cvref_t<T>>;
} // namespace lambda2_detail
#define BOOST_LAMBDA2_UNARY_LAMBDA(op, fn) \
@@ -226,14 +228,14 @@ BOOST_LAMBDA2_BINARY_LAMBDA(>>=, lambda2_detail::right_shift_equal)
// operator<<
template<class A, class = std::enable_if_t<!std::is_convertible<A&, std::ios_base&>::value>,
template<class A, class = std::enable_if_t<!lambda2_detail::is_stream<A>::value>,
class B, class = lambda2_detail::enable_binary_lambda<A, B>>
auto operator<<( A&& a, B&& b )
{
return std::bind( lambda2_detail::left_shift(), std::forward<A>(a), std::forward<B>(b) ); \
}
template<class A, class = std::enable_if_t<std::is_convertible<A&, std::ios_base&>::value>,
template<class A, class = std::enable_if_t<lambda2_detail::is_stream<A>::value>,
class B, class = lambda2_detail::enable_unary_lambda<B>>
auto operator<<( A& a, B&& b )
{
@@ -242,14 +244,14 @@ auto operator<<( A& a, B&& b )
// operator>>
template<class A, class = std::enable_if_t<!std::is_convertible<A&, std::ios_base&>::value>,
template<class A, class = std::enable_if_t<!lambda2_detail::is_stream<A>::value>,
class B, class = lambda2_detail::enable_binary_lambda<A, B>>
auto operator>>( A&& a, B&& b )
{
return std::bind( lambda2_detail::right_shift(), std::forward<A>(a), std::forward<B>(b) ); \
}
template<class A, class = std::enable_if_t<std::is_convertible<A&, std::ios_base&>::value>,
template<class A, class = std::enable_if_t<lambda2_detail::is_stream<A>::value>,
class B, class = lambda2_detail::enable_unary_lambda<B>>
auto operator>>( A& a, B&& b )
{