Strictify async_inner_type

Summary: Only accept Async input now Reviewed By: yfeldblum Differential Revision: D22268635 fbshipit-source-id: cd974af7a7a3adc25b3c90029efe4c6080c3739a

Strictify async_inner_type
Summary: Only accept Async input now Reviewed By: yfeldblum Differential Revision: D22268635 fbshipit-source-id: cd974af7a7a3adc25b3c90029efe4c6080c3739a
01da43c2 · Matthieu Martin · Facebook GitHub Bot · 0ff36eaf · 01da43c2
Commit 01da43c2 authored Jun 29, 2020 by Matthieu Martin Committed by Facebook GitHub Bot Jun 29, 2020
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folly/fibers/async/Async.h folly/fibers/async/Async.h +1 -3

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--- a/folly/fibers/async/Async.h
+++ b/folly/fibers/async/Async.h
@@ -151,9 +151,7 @@ constexpr bool is_async_v = folly::detail::is_instantiation_of_v<Async, T>;

 // async_inner_type
 template <typename T>
-struct async_inner_type {
-  using type = T;
-};
+struct async_inner_type;

 template <typename T>
 struct async_inner_type<Async<T>> {