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Simplify overloads in any_executor's query() backend.

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This commit is contained in:
Christopher Kohlhoff
2020-07-02 20:11:14 +10:00
parent 43ecf63e14
commit ff695a0376
1 changed files with 34 additions and 27 deletions
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61
include/boost/asio/execution/any_executor.hpp
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@@ -829,21 +829,16 @@ protected:
# pragma warning (disable:4702)
#endif // defined(BOOST_ASIO_MSVC)
template <typename Ex, class Prop>
static void query_fn_impl(void*, const void*, const void*,
typename enable_if<
is_same<Ex, void>::value
>::type*)
static void query_fn_void(void*, const void*, const void*)
{
bad_executor ex;
boost::asio::detail::throw_exception(ex);
}
template <typename Ex, class Prop>
static void query_fn_impl(void*, const void* ex, const void* prop,
static void query_fn_non_void(void*, const void* ex, const void* prop,
typename enable_if<
!is_same<Ex, void>::value
&& boost::asio::can_query<const Ex&, const Prop&>::value
boost::asio::can_query<const Ex&, const Prop&>::value
&& is_same<typename Prop::polymorphic_query_result_type, void>::value
>::type*)
{
@@ -852,20 +847,18 @@ protected:
}
template <typename Ex, class Prop>
static void query_fn_impl(void*, const void*, const void*,
static void query_fn_non_void(void*, const void*, const void*,
typename enable_if<
!is_same<Ex, void>::value
&& !boost::asio::can_query<const Ex&, const Prop&>::value
!boost::asio::can_query<const Ex&, const Prop&>::value
&& is_same<typename Prop::polymorphic_query_result_type, void>::value
>::type*)
{
}
template <typename Ex, class Prop>
static void query_fn_impl(void* result, const void* ex, const void* prop,
static void query_fn_non_void(void* result, const void* ex, const void* prop,
typename enable_if<
!is_same<Ex, void>::value
&& boost::asio::can_query<const Ex&, const Prop&>::value
boost::asio::can_query<const Ex&, const Prop&>::value
&& !is_same<typename Prop::polymorphic_query_result_type, void>::value
&& is_reference<typename Prop::polymorphic_query_result_type>::value
>::type*)
@@ -878,10 +871,9 @@ protected:
}
template <typename Ex, class Prop>
static void query_fn_impl(void*, const void*, const void*,
static void query_fn_non_void(void*, const void*, const void*,
typename enable_if<
!is_same<Ex, void>::value
&& !boost::asio::can_query<const Ex&, const Prop&>::value
!boost::asio::can_query<const Ex&, const Prop&>::value
&& !is_same<typename Prop::polymorphic_query_result_type, void>::value
&& is_reference<typename Prop::polymorphic_query_result_type>::value
>::type*)
@@ -890,10 +882,9 @@ protected:
}
template <typename Ex, class Prop>
static void query_fn_impl(void* result, const void* ex, const void* prop,
static void query_fn_non_void(void* result, const void* ex, const void* prop,
typename enable_if<
!is_same<Ex, void>::value
&& boost::asio::can_query<const Ex&, const Prop&>::value
boost::asio::can_query<const Ex&, const Prop&>::value
&& !is_same<typename Prop::polymorphic_query_result_type, void>::value
&& is_scalar<typename Prop::polymorphic_query_result_type>::value
>::type*)
@@ -905,10 +896,9 @@ protected:
}
template <typename Ex, class Prop>
static void query_fn_impl(void* result, const void*, const void*,
static void query_fn_non_void(void* result, const void*, const void*,
typename enable_if<
!is_same<Ex, void>::value
&& !boost::asio::can_query<const Ex&, const Prop&>::value
!boost::asio::can_query<const Ex&, const Prop&>::value
&& !is_same<typename Prop::polymorphic_query_result_type, void>::value
&& is_scalar<typename Prop::polymorphic_query_result_type>::value
>::type*)
@@ -918,10 +908,9 @@ protected:
}
template <typename Ex, class Prop>
static void query_fn_impl(void* result, const void* ex, const void* prop,
static void query_fn_non_void(void* result, const void* ex, const void* prop,
typename enable_if<
!is_same<Ex, void>::value
&& boost::asio::can_query<const Ex&, const Prop&>::value
boost::asio::can_query<const Ex&, const Prop&>::value
&& !is_same<typename Prop::polymorphic_query_result_type, void>::value
&& !is_reference<typename Prop::polymorphic_query_result_type>::value
&& !is_scalar<typename Prop::polymorphic_query_result_type>::value
@@ -934,12 +923,30 @@ protected:
}
template <typename Ex, class Prop>
static void query_fn_impl(void* result, const void*, const void*, ...)
static void query_fn_non_void(void* result, const void*, const void*, ...)
{
*static_cast<typename Prop::polymorphic_query_result_type**>(result)
= new typename Prop::polymorphic_query_result_type();
}
template <typename Ex, class Prop>
static void query_fn_impl(void* result, const void* ex, const void* prop,
typename enable_if<
is_same<Ex, void>::value
>::type*)
{
query_fn_void(result, ex, prop);
}
template <typename Ex, class Prop>
static void query_fn_impl(void* result, const void* ex, const void* prop,
typename enable_if<
!is_same<Ex, void>::value
>::type*)
{
query_fn_non_void<Ex, Prop>(result, ex, prop, 0);
}
template <typename Ex, class Prop>
static void query_fn(void* result, const void* ex, const void* prop)
{