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/// A simple shortcut for ensuring a type is send and sync.
///
/// For most types just call it after defining the type:
///
/// ```
/// pub struct MyStruct {}
/// assert_send_and_sync!(MyStruct);
/// ```
///
/// For types with lifetimes, use the anonymous lifetime:
///
/// ```
/// pub struct WithLifetime<'a> {}
/// assert_send_and_sync!(MyStruct<'_>);
/// ```
///
/// For a type generic over another type `W`,
/// pass the type `W` as a where clause
/// including a trait bound when needed:
///
/// ```
/// pub struct MyWriter<W: io::Write> {}
/// assert_send_and_sync!(MyWriterStruct<W> where W: io::Write);
/// ```
///
/// This will assert that `MyWriterStruct<W>` is `Send` and `Sync`
/// if `W` is `Send` and `Sync`.
///
/// You can also combine the two and be generic over multiple types.
/// Just make sure to list all the types - even those without additional
/// trait bounds:
///
/// ```
/// pub struct MyWriterWithLifetime<a', C, W: io::Write> {}
/// assert_send_and_sync!(MyWriterStruct<'_, C, W> where C, W: io::Write);
/// ```
///
/// If you need multiple additional trait bounds on a single type
/// you can add them separated by `+` like in normal where clauses.
/// However you have to make sure they are `Identifiers` like `Write`.
/// In macro patterns `Paths` (like `io::Write`) may not be followed
/// by `+` characters.
};
=> ;
=> ;
}
pub
pub