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Fix a missing typename build failure

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This commit is contained in:
Denis Blank 2018-02-10 01:15:33 +01:00
parent 04111c0bc3
commit 4b00f5ff8a
1 changed files with 9 additions and 8 deletions
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17
include/continuable/detail/traverse-async.hpp
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@ -530,22 +530,23 @@ auto apply_pack_transform_async(Visitor&& visitor, Args&&... args) {
// Provide the frame and visitor type
using types = async_traversal_types<Visitor, Args...>;
using frame_t = typename types::frame_t;
using visitor_t = typename types::visitor_t;
// Check whether the visitor inherits enable_shared_from_this
static_assert(
std::is_base_of<std::enable_shared_from_this<typename types::visitor_t>,
typename types::visitor_t>::value,
"The visitor must inherit std::enable_shared_from_this!");
static_assert(std::is_base_of<std::enable_shared_from_this<visitor_t>,
visitor_t>::value,
"The visitor must inherit std::enable_shared_from_this!");
// Check whether the visitor is virtual destructible
static_assert(std::has_virtual_destructor<typename types::visitor_t>::value,
static_assert(std::has_virtual_destructor<visitor_t>::value,
"The visitor must have a virtual destructor!");
// Create the frame on the heap which stores the arguments
// to traverse asynchronous. It persists until the
// traversal frame isn't referenced anymore.
auto frame = std::make_shared<types::frame_t>(std::forward<Visitor>(visitor),
std::forward<Args>(args)...);
auto frame = std::make_shared<frame_t>(std::forward<Visitor>(visitor),
std::forward<Args>(args)...);
// Create a static range for the top level tuple
auto range = std::make_tuple(make_static_range(frame->head()));
@ -558,7 +559,7 @@ auto apply_pack_transform_async(Visitor&& visitor, Args&&... args) {
// Cast the shared_ptr down to the given visitor type
// for implementation invisibility
return std::static_pointer_cast<types::visitor_t>(std::move(frame));
return std::static_pointer_cast<visitor_t>(std::move(frame));
}
} // namespace traversal
} // namespace detail