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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 09:22:09 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 09:22:09 +0000
commit43a97878ce14b72f0981164f87f2e35e14151312 (patch)
tree620249daf56c0258faa40cbdcf9cfba06de2a846 /third_party/rust/tokio/src/macros/select.rs
parentInitial commit. (diff)
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Adding upstream version 110.0.1.upstream/110.0.1upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
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+/// Waits on multiple concurrent branches, returning when the **first** branch
+/// completes, cancelling the remaining branches.
+///
+/// The `select!` macro must be used inside of async functions, closures, and
+/// blocks.
+///
+/// The `select!` macro accepts one or more branches with the following pattern:
+///
+/// ```text
+/// <pattern> = <async expression> (, if <precondition>)? => <handler>,
+/// ```
+///
+/// Additionally, the `select!` macro may include a single, optional `else`
+/// branch, which evaluates if none of the other branches match their patterns:
+///
+/// ```text
+/// else => <expression>
+/// ```
+///
+/// The macro aggregates all `<async expression>` expressions and runs them
+/// concurrently on the **current** task. Once the **first** expression
+/// completes with a value that matches its `<pattern>`, the `select!` macro
+/// returns the result of evaluating the completed branch's `<handler>`
+/// expression.
+///
+/// Additionally, each branch may include an optional `if` precondition. If the
+/// precondition returns `false`, then the branch is disabled. The provided
+/// `<async expression>` is still evaluated but the resulting future is never
+/// polled. This capability is useful when using `select!` within a loop.
+///
+/// The complete lifecycle of a `select!` expression is as follows:
+///
+/// 1. Evaluate all provided `<precondition>` expressions. If the precondition
+/// returns `false`, disable the branch for the remainder of the current call
+/// to `select!`. Re-entering `select!` due to a loop clears the "disabled"
+/// state.
+/// 2. Aggregate the `<async expression>`s from each branch, including the
+/// disabled ones. If the branch is disabled, `<async expression>` is still
+/// evaluated, but the resulting future is not polled.
+/// 3. Concurrently await on the results for all remaining `<async expression>`s.
+/// 4. Once an `<async expression>` returns a value, attempt to apply the value
+/// to the provided `<pattern>`, if the pattern matches, evaluate `<handler>`
+/// and return. If the pattern **does not** match, disable the current branch
+/// and for the remainder of the current call to `select!`. Continue from step 3.
+/// 5. If **all** branches are disabled, evaluate the `else` expression. If no
+/// else branch is provided, panic.
+///
+/// # Runtime characteristics
+///
+/// By running all async expressions on the current task, the expressions are
+/// able to run **concurrently** but not in **parallel**. This means all
+/// expressions are run on the same thread and if one branch blocks the thread,
+/// all other expressions will be unable to continue. If parallelism is
+/// required, spawn each async expression using [`tokio::spawn`] and pass the
+/// join handle to `select!`.
+///
+/// [`tokio::spawn`]: crate::spawn
+///
+/// # Fairness
+///
+/// By default, `select!` randomly picks a branch to check first. This provides
+/// some level of fairness when calling `select!` in a loop with branches that
+/// are always ready.
+///
+/// This behavior can be overridden by adding `biased;` to the beginning of the
+/// macro usage. See the examples for details. This will cause `select` to poll
+/// the futures in the order they appear from top to bottom. There are a few
+/// reasons you may want this:
+///
+/// - The random number generation of `tokio::select!` has a non-zero CPU cost
+/// - Your futures may interact in a way where known polling order is significant
+///
+/// But there is an important caveat to this mode. It becomes your responsibility
+/// to ensure that the polling order of your futures is fair. If for example you
+/// are selecting between a stream and a shutdown future, and the stream has a
+/// huge volume of messages and zero or nearly zero time between them, you should
+/// place the shutdown future earlier in the `select!` list to ensure that it is
+/// always polled, and will not be ignored due to the stream being constantly
+/// ready.
+///
+/// # Panics
+///
+/// The `select!` macro panics if all branches are disabled **and** there is no
+/// provided `else` branch. A branch is disabled when the provided `if`
+/// precondition returns `false` **or** when the pattern does not match the
+/// result of `<async expression>`.
+///
+/// # Cancellation safety
+///
+/// When using `select!` in a loop to receive messages from multiple sources,
+/// you should make sure that the receive call is cancellation safe to avoid
+/// losing messages. This section goes through various common methods and
+/// describes whether they are cancel safe. The lists in this section are not
+/// exhaustive.
+///
+/// The following methods are cancellation safe:
+///
+/// * [`tokio::sync::mpsc::Receiver::recv`](crate::sync::mpsc::Receiver::recv)
+/// * [`tokio::sync::mpsc::UnboundedReceiver::recv`](crate::sync::mpsc::UnboundedReceiver::recv)
+/// * [`tokio::sync::broadcast::Receiver::recv`](crate::sync::broadcast::Receiver::recv)
+/// * [`tokio::sync::watch::Receiver::changed`](crate::sync::watch::Receiver::changed)
+/// * [`tokio::net::TcpListener::accept`](crate::net::TcpListener::accept)
+/// * [`tokio::net::UnixListener::accept`](crate::net::UnixListener::accept)
+/// * [`tokio::io::AsyncReadExt::read`](crate::io::AsyncReadExt::read) on any `AsyncRead`
+/// * [`tokio::io::AsyncReadExt::read_buf`](crate::io::AsyncReadExt::read_buf) on any `AsyncRead`
+/// * [`tokio::io::AsyncWriteExt::write`](crate::io::AsyncWriteExt::write) on any `AsyncWrite`
+/// * [`tokio::io::AsyncWriteExt::write_buf`](crate::io::AsyncWriteExt::write_buf) on any `AsyncWrite`
+/// * [`tokio_stream::StreamExt::next`](https://docs.rs/tokio-stream/0.1/tokio_stream/trait.StreamExt.html#method.next) on any `Stream`
+/// * [`futures::stream::StreamExt::next`](https://docs.rs/futures/0.3/futures/stream/trait.StreamExt.html#method.next) on any `Stream`
+///
+/// The following methods are not cancellation safe and can lead to loss of data:
+///
+/// * [`tokio::io::AsyncReadExt::read_exact`](crate::io::AsyncReadExt::read_exact)
+/// * [`tokio::io::AsyncReadExt::read_to_end`](crate::io::AsyncReadExt::read_to_end)
+/// * [`tokio::io::AsyncReadExt::read_to_string`](crate::io::AsyncReadExt::read_to_string)
+/// * [`tokio::io::AsyncWriteExt::write_all`](crate::io::AsyncWriteExt::write_all)
+///
+/// The following methods are not cancellation safe because they use a queue for
+/// fairness and cancellation makes you lose your place in the queue:
+///
+/// * [`tokio::sync::Mutex::lock`](crate::sync::Mutex::lock)
+/// * [`tokio::sync::RwLock::read`](crate::sync::RwLock::read)
+/// * [`tokio::sync::RwLock::write`](crate::sync::RwLock::write)
+/// * [`tokio::sync::Semaphore::acquire`](crate::sync::Semaphore::acquire)
+/// * [`tokio::sync::Notify::notified`](crate::sync::Notify::notified)
+///
+/// To determine whether your own methods are cancellation safe, look for the
+/// location of uses of `.await`. This is because when an asynchronous method is
+/// cancelled, that always happens at an `.await`. If your function behaves
+/// correctly even if it is restarted while waiting at an `.await`, then it is
+/// cancellation safe.
+///
+/// Be aware that cancelling something that is not cancellation safe is not
+/// necessarily wrong. For example, if you are cancelling a task because the
+/// application is shutting down, then you probably don't care that partially
+/// read data is lost.
+///
+/// # Examples
+///
+/// Basic select with two branches.
+///
+/// ```
+/// async fn do_stuff_async() {
+/// // async work
+/// }
+///
+/// async fn more_async_work() {
+/// // more here
+/// }
+///
+/// #[tokio::main]
+/// async fn main() {
+/// tokio::select! {
+/// _ = do_stuff_async() => {
+/// println!("do_stuff_async() completed first")
+/// }
+/// _ = more_async_work() => {
+/// println!("more_async_work() completed first")
+/// }
+/// };
+/// }
+/// ```
+///
+/// Basic stream selecting.
+///
+/// ```
+/// use tokio_stream::{self as stream, StreamExt};
+///
+/// #[tokio::main]
+/// async fn main() {
+/// let mut stream1 = stream::iter(vec![1, 2, 3]);
+/// let mut stream2 = stream::iter(vec![4, 5, 6]);
+///
+/// let next = tokio::select! {
+/// v = stream1.next() => v.unwrap(),
+/// v = stream2.next() => v.unwrap(),
+/// };
+///
+/// assert!(next == 1 || next == 4);
+/// }
+/// ```
+///
+/// Collect the contents of two streams. In this example, we rely on pattern
+/// matching and the fact that `stream::iter` is "fused", i.e. once the stream
+/// is complete, all calls to `next()` return `None`.
+///
+/// ```
+/// use tokio_stream::{self as stream, StreamExt};
+///
+/// #[tokio::main]
+/// async fn main() {
+/// let mut stream1 = stream::iter(vec![1, 2, 3]);
+/// let mut stream2 = stream::iter(vec![4, 5, 6]);
+///
+/// let mut values = vec![];
+///
+/// loop {
+/// tokio::select! {
+/// Some(v) = stream1.next() => values.push(v),
+/// Some(v) = stream2.next() => values.push(v),
+/// else => break,
+/// }
+/// }
+///
+/// values.sort();
+/// assert_eq!(&[1, 2, 3, 4, 5, 6], &values[..]);
+/// }
+/// ```
+///
+/// Using the same future in multiple `select!` expressions can be done by passing
+/// a reference to the future. Doing so requires the future to be [`Unpin`]. A
+/// future can be made [`Unpin`] by either using [`Box::pin`] or stack pinning.
+///
+/// [`Unpin`]: std::marker::Unpin
+/// [`Box::pin`]: std::boxed::Box::pin
+///
+/// Here, a stream is consumed for at most 1 second.
+///
+/// ```
+/// use tokio_stream::{self as stream, StreamExt};
+/// use tokio::time::{self, Duration};
+///
+/// #[tokio::main]
+/// async fn main() {
+/// let mut stream = stream::iter(vec![1, 2, 3]);
+/// let sleep = time::sleep(Duration::from_secs(1));
+/// tokio::pin!(sleep);
+///
+/// loop {
+/// tokio::select! {
+/// maybe_v = stream.next() => {
+/// if let Some(v) = maybe_v {
+/// println!("got = {}", v);
+/// } else {
+/// break;
+/// }
+/// }
+/// _ = &mut sleep => {
+/// println!("timeout");
+/// break;
+/// }
+/// }
+/// }
+/// }
+/// ```
+///
+/// Joining two values using `select!`.
+///
+/// ```
+/// use tokio::sync::oneshot;
+///
+/// #[tokio::main]
+/// async fn main() {
+/// let (tx1, mut rx1) = oneshot::channel();
+/// let (tx2, mut rx2) = oneshot::channel();
+///
+/// tokio::spawn(async move {
+/// tx1.send("first").unwrap();
+/// });
+///
+/// tokio::spawn(async move {
+/// tx2.send("second").unwrap();
+/// });
+///
+/// let mut a = None;
+/// let mut b = None;
+///
+/// while a.is_none() || b.is_none() {
+/// tokio::select! {
+/// v1 = (&mut rx1), if a.is_none() => a = Some(v1.unwrap()),
+/// v2 = (&mut rx2), if b.is_none() => b = Some(v2.unwrap()),
+/// }
+/// }
+///
+/// let res = (a.unwrap(), b.unwrap());
+///
+/// assert_eq!(res.0, "first");
+/// assert_eq!(res.1, "second");
+/// }
+/// ```
+///
+/// Using the `biased;` mode to control polling order.
+///
+/// ```
+/// #[tokio::main]
+/// async fn main() {
+/// let mut count = 0u8;
+///
+/// loop {
+/// tokio::select! {
+/// // If you run this example without `biased;`, the polling order is
+/// // pseudo-random, and the assertions on the value of count will
+/// // (probably) fail.
+/// biased;
+///
+/// _ = async {}, if count < 1 => {
+/// count += 1;
+/// assert_eq!(count, 1);
+/// }
+/// _ = async {}, if count < 2 => {
+/// count += 1;
+/// assert_eq!(count, 2);
+/// }
+/// _ = async {}, if count < 3 => {
+/// count += 1;
+/// assert_eq!(count, 3);
+/// }
+/// _ = async {}, if count < 4 => {
+/// count += 1;
+/// assert_eq!(count, 4);
+/// }
+///
+/// else => {
+/// break;
+/// }
+/// };
+/// }
+/// }
+/// ```
+///
+/// ## Avoid racy `if` preconditions
+///
+/// Given that `if` preconditions are used to disable `select!` branches, some
+/// caution must be used to avoid missing values.
+///
+/// For example, here is **incorrect** usage of `sleep` with `if`. The objective
+/// is to repeatedly run an asynchronous task for up to 50 milliseconds.
+/// However, there is a potential for the `sleep` completion to be missed.
+///
+/// ```no_run,should_panic
+/// use tokio::time::{self, Duration};
+///
+/// async fn some_async_work() {
+/// // do work
+/// }
+///
+/// #[tokio::main]
+/// async fn main() {
+/// let sleep = time::sleep(Duration::from_millis(50));
+/// tokio::pin!(sleep);
+///
+/// while !sleep.is_elapsed() {
+/// tokio::select! {
+/// _ = &mut sleep, if !sleep.is_elapsed() => {
+/// println!("operation timed out");
+/// }
+/// _ = some_async_work() => {
+/// println!("operation completed");
+/// }
+/// }
+/// }
+///
+/// panic!("This example shows how not to do it!");
+/// }
+/// ```
+///
+/// In the above example, `sleep.is_elapsed()` may return `true` even if
+/// `sleep.poll()` never returned `Ready`. This opens up a potential race
+/// condition where `sleep` expires between the `while !sleep.is_elapsed()`
+/// check and the call to `select!` resulting in the `some_async_work()` call to
+/// run uninterrupted despite the sleep having elapsed.
+///
+/// One way to write the above example without the race would be:
+///
+/// ```
+/// use tokio::time::{self, Duration};
+///
+/// async fn some_async_work() {
+/// # time::sleep(Duration::from_millis(10)).await;
+/// // do work
+/// }
+///
+/// #[tokio::main]
+/// async fn main() {
+/// let sleep = time::sleep(Duration::from_millis(50));
+/// tokio::pin!(sleep);
+///
+/// loop {
+/// tokio::select! {
+/// _ = &mut sleep => {
+/// println!("operation timed out");
+/// break;
+/// }
+/// _ = some_async_work() => {
+/// println!("operation completed");
+/// }
+/// }
+/// }
+/// }
+/// ```
+#[macro_export]
+#[cfg_attr(docsrs, doc(cfg(feature = "macros")))]
+macro_rules! select {
+ // Uses a declarative macro to do **most** of the work. While it is possible
+ // to implement fully with a declarative macro, a procedural macro is used
+ // to enable improved error messages.
+ //
+ // The macro is structured as a tt-muncher. All branches are processed and
+ // normalized. Once the input is normalized, it is passed to the top-most
+ // rule. When entering the macro, `@{ }` is inserted at the front. This is
+ // used to collect the normalized input.
+ //
+ // The macro only recurses once per branch. This allows using `select!`
+ // without requiring the user to increase the recursion limit.
+
+ // All input is normalized, now transform.
+ (@ {
+ // The index of the future to poll first (in bias mode), or the RNG
+ // expression to use to pick a future to poll first.
+ start=$start:expr;
+
+ // One `_` for each branch in the `select!` macro. Passing this to
+ // `count!` converts $skip to an integer.
+ ( $($count:tt)* )
+
+ // Normalized select branches. `( $skip )` is a set of `_` characters.
+ // There is one `_` for each select branch **before** this one. Given
+ // that all input futures are stored in a tuple, $skip is useful for
+ // generating a pattern to reference the future for the current branch.
+ // $skip is also used as an argument to `count!`, returning the index of
+ // the current select branch.
+ $( ( $($skip:tt)* ) $bind:pat = $fut:expr, if $c:expr => $handle:expr, )+
+
+ // Fallback expression used when all select branches have been disabled.
+ ; $else:expr
+
+ }) => {{
+ // Enter a context where stable "function-like" proc macros can be used.
+ //
+ // This module is defined within a scope and should not leak out of this
+ // macro.
+ mod util {
+ // Generate an enum with one variant per select branch
+ $crate::select_priv_declare_output_enum!( ( $($count)* ) );
+ }
+
+ // `tokio::macros::support` is a public, but doc(hidden) module
+ // including a re-export of all types needed by this macro.
+ use $crate::macros::support::Future;
+ use $crate::macros::support::Pin;
+ use $crate::macros::support::Poll::{Ready, Pending};
+
+ const BRANCHES: u32 = $crate::count!( $($count)* );
+
+ let mut disabled: util::Mask = Default::default();
+
+ // First, invoke all the pre-conditions. For any that return true,
+ // set the appropriate bit in `disabled`.
+ $(
+ if !$c {
+ let mask: util::Mask = 1 << $crate::count!( $($skip)* );
+ disabled |= mask;
+ }
+ )*
+
+ // Create a scope to separate polling from handling the output. This
+ // adds borrow checker flexibility when using the macro.
+ let mut output = {
+ // Safety: Nothing must be moved out of `futures`. This is to
+ // satisfy the requirement of `Pin::new_unchecked` called below.
+ let mut futures = ( $( $fut , )+ );
+
+ $crate::macros::support::poll_fn(|cx| {
+ // Track if any branch returns pending. If no branch completes
+ // **or** returns pending, this implies that all branches are
+ // disabled.
+ let mut is_pending = false;
+
+ // Choose a starting index to begin polling the futures at. In
+ // practice, this will either be a pseudo-randomly generated
+ // number by default, or the constant 0 if `biased;` is
+ // supplied.
+ let start = $start;
+
+ for i in 0..BRANCHES {
+ let branch;
+ #[allow(clippy::modulo_one)]
+ {
+ branch = (start + i) % BRANCHES;
+ }
+ match branch {
+ $(
+ #[allow(unreachable_code)]
+ $crate::count!( $($skip)* ) => {
+ // First, if the future has previously been
+ // disabled, do not poll it again. This is done
+ // by checking the associated bit in the
+ // `disabled` bit field.
+ let mask = 1 << branch;
+
+ if disabled & mask == mask {
+ // The future has been disabled.
+ continue;
+ }
+
+ // Extract the future for this branch from the
+ // tuple
+ let ( $($skip,)* fut, .. ) = &mut futures;
+
+ // Safety: future is stored on the stack above
+ // and never moved.
+ let mut fut = unsafe { Pin::new_unchecked(fut) };
+
+ // Try polling it
+ let out = match Future::poll(fut, cx) {
+ Ready(out) => out,
+ Pending => {
+ // Track that at least one future is
+ // still pending and continue polling.
+ is_pending = true;
+ continue;
+ }
+ };
+
+ // Disable the future from future polling.
+ disabled |= mask;
+
+ // The future returned a value, check if matches
+ // the specified pattern.
+ #[allow(unused_variables)]
+ #[allow(unused_mut)]
+ match &out {
+ $crate::select_priv_clean_pattern!($bind) => {}
+ _ => continue,
+ }
+
+ // The select is complete, return the value
+ return Ready($crate::select_variant!(util::Out, ($($skip)*))(out));
+ }
+ )*
+ _ => unreachable!("reaching this means there probably is an off by one bug"),
+ }
+ }
+
+ if is_pending {
+ Pending
+ } else {
+ // All branches have been disabled.
+ Ready(util::Out::Disabled)
+ }
+ }).await
+ };
+
+ match output {
+ $(
+ $crate::select_variant!(util::Out, ($($skip)*) ($bind)) => $handle,
+ )*
+ util::Out::Disabled => $else,
+ _ => unreachable!("failed to match bind"),
+ }
+ }};
+
+ // ==== Normalize =====
+
+ // These rules match a single `select!` branch and normalize it for
+ // processing by the first rule.
+
+ (@ { start=$start:expr; $($t:tt)* } ) => {
+ // No `else` branch
+ $crate::select!(@{ start=$start; $($t)*; panic!("all branches are disabled and there is no else branch") })
+ };
+ (@ { start=$start:expr; $($t:tt)* } else => $else:expr $(,)?) => {
+ $crate::select!(@{ start=$start; $($t)*; $else })
+ };
+ (@ { start=$start:expr; ( $($s:tt)* ) $($t:tt)* } $p:pat = $f:expr, if $c:expr => $h:block, $($r:tt)* ) => {
+ $crate::select!(@{ start=$start; ($($s)* _) $($t)* ($($s)*) $p = $f, if $c => $h, } $($r)*)
+ };
+ (@ { start=$start:expr; ( $($s:tt)* ) $($t:tt)* } $p:pat = $f:expr => $h:block, $($r:tt)* ) => {
+ $crate::select!(@{ start=$start; ($($s)* _) $($t)* ($($s)*) $p = $f, if true => $h, } $($r)*)
+ };
+ (@ { start=$start:expr; ( $($s:tt)* ) $($t:tt)* } $p:pat = $f:expr, if $c:expr => $h:block $($r:tt)* ) => {
+ $crate::select!(@{ start=$start; ($($s)* _) $($t)* ($($s)*) $p = $f, if $c => $h, } $($r)*)
+ };
+ (@ { start=$start:expr; ( $($s:tt)* ) $($t:tt)* } $p:pat = $f:expr => $h:block $($r:tt)* ) => {
+ $crate::select!(@{ start=$start; ($($s)* _) $($t)* ($($s)*) $p = $f, if true => $h, } $($r)*)
+ };
+ (@ { start=$start:expr; ( $($s:tt)* ) $($t:tt)* } $p:pat = $f:expr, if $c:expr => $h:expr ) => {
+ $crate::select!(@{ start=$start; ($($s)* _) $($t)* ($($s)*) $p = $f, if $c => $h, })
+ };
+ (@ { start=$start:expr; ( $($s:tt)* ) $($t:tt)* } $p:pat = $f:expr => $h:expr ) => {
+ $crate::select!(@{ start=$start; ($($s)* _) $($t)* ($($s)*) $p = $f, if true => $h, })
+ };
+ (@ { start=$start:expr; ( $($s:tt)* ) $($t:tt)* } $p:pat = $f:expr, if $c:expr => $h:expr, $($r:tt)* ) => {
+ $crate::select!(@{ start=$start; ($($s)* _) $($t)* ($($s)*) $p = $f, if $c => $h, } $($r)*)
+ };
+ (@ { start=$start:expr; ( $($s:tt)* ) $($t:tt)* } $p:pat = $f:expr => $h:expr, $($r:tt)* ) => {
+ $crate::select!(@{ start=$start; ($($s)* _) $($t)* ($($s)*) $p = $f, if true => $h, } $($r)*)
+ };
+
+ // ===== Entry point =====
+
+ (biased; $p:pat = $($t:tt)* ) => {
+ $crate::select!(@{ start=0; () } $p = $($t)*)
+ };
+
+ ( $p:pat = $($t:tt)* ) => {
+ // Randomly generate a starting point. This makes `select!` a bit more
+ // fair and avoids always polling the first future.
+ $crate::select!(@{ start={ $crate::macros::support::thread_rng_n(BRANCHES) }; () } $p = $($t)*)
+ };
+ () => {
+ compile_error!("select! requires at least one branch.")
+ };
+}
+
+// And here... we manually list out matches for up to 64 branches... I'm not
+// happy about it either, but this is how we manage to use a declarative macro!
+
+#[macro_export]
+#[doc(hidden)]
+macro_rules! count {
+ () => {
+ 0
+ };
+ (_) => {
+ 1
+ };
+ (_ _) => {
+ 2
+ };
+ (_ _ _) => {
+ 3
+ };
+ (_ _ _ _) => {
+ 4
+ };
+ (_ _ _ _ _) => {
+ 5
+ };
+ (_ _ _ _ _ _) => {
+ 6
+ };
+ (_ _ _ _ _ _ _) => {
+ 7
+ };
+ (_ _ _ _ _ _ _ _) => {
+ 8
+ };
+ (_ _ _ _ _ _ _ _ _) => {
+ 9
+ };
+ (_ _ _ _ _ _ _ _ _ _) => {
+ 10
+ };
+ (_ _ _ _ _ _ _ _ _ _ _) => {
+ 11
+ };
+ (_ _ _ _ _ _ _ _ _ _ _ _) => {
+ 12
+ };
+ (_ _ _ _ _ _ _ _ _ _ _ _ _) => {
+ 13
+ };
+ (_ _ _ _ _ _ _ _ _ _ _ _ _ _) => {
+ 14
+ };
+ (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => {
+ 15
+ };
+ (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => {
+ 16
+ };
+ (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => {
+ 17
+ };
+ (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => {
+ 18
+ };
+ (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => {
+ 19
+ };
+ (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => {
+ 20
+ };
+ (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => {
+ 21
+ };
+ (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => {
+ 22
+ };
+ (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => {
+ 23
+ };
+ (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => {
+ 24
+ };
+ (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => {
+ 25
+ };
+ (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => {
+ 26
+ };
+ (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => {
+ 27
+ };
+ (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => {
+ 28
+ };
+ (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => {
+ 29
+ };
+ (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => {
+ 30
+ };
+ (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => {
+ 31
+ };
+ (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => {
+ 32
+ };
+ (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => {
+ 33
+ };
+ (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => {
+ 34
+ };
+ (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => {
+ 35
+ };
+ (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => {
+ 36
+ };
+ (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => {
+ 37
+ };
+ (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => {
+ 38
+ };
+ (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => {
+ 39
+ };
+ (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => {
+ 40
+ };
+ (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => {
+ 41
+ };
+ (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => {
+ 42
+ };
+ (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => {
+ 43
+ };
+ (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => {
+ 44
+ };
+ (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => {
+ 45
+ };
+ (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => {
+ 46
+ };
+ (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => {
+ 47
+ };
+ (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => {
+ 48
+ };
+ (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => {
+ 49
+ };
+ (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => {
+ 50
+ };
+ (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => {
+ 51
+ };
+ (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => {
+ 52
+ };
+ (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => {
+ 53
+ };
+ (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => {
+ 54
+ };
+ (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => {
+ 55
+ };
+ (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => {
+ 56
+ };
+ (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => {
+ 57
+ };
+ (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => {
+ 58
+ };
+ (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => {
+ 59
+ };
+ (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => {
+ 60
+ };
+ (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => {
+ 61
+ };
+ (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => {
+ 62
+ };
+ (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => {
+ 63
+ };
+}
+
+#[macro_export]
+#[doc(hidden)]
+macro_rules! select_variant {
+ ($($p:ident)::*, () $($t:tt)*) => {
+ $($p)::*::_0 $($t)*
+ };
+ ($($p:ident)::*, (_) $($t:tt)*) => {
+ $($p)::*::_1 $($t)*
+ };
+ ($($p:ident)::*, (_ _) $($t:tt)*) => {
+ $($p)::*::_2 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _) $($t:tt)*) => {
+ $($p)::*::_3 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _ _) $($t:tt)*) => {
+ $($p)::*::_4 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _ _ _) $($t:tt)*) => {
+ $($p)::*::_5 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _ _ _ _) $($t:tt)*) => {
+ $($p)::*::_6 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _ _ _ _ _) $($t:tt)*) => {
+ $($p)::*::_7 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _ _ _ _ _ _) $($t:tt)*) => {
+ $($p)::*::_8 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _ _ _ _ _ _ _) $($t:tt)*) => {
+ $($p)::*::_9 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _ _ _ _ _ _ _ _) $($t:tt)*) => {
+ $($p)::*::_10 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _ _ _ _ _ _ _ _ _) $($t:tt)*) => {
+ $($p)::*::_11 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _ _ _ _ _ _ _ _ _ _) $($t:tt)*) => {
+ $($p)::*::_12 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _ _ _ _ _ _ _ _ _ _ _) $($t:tt)*) => {
+ $($p)::*::_13 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _ _ _ _ _ _ _ _ _ _ _ _) $($t:tt)*) => {
+ $($p)::*::_14 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _) $($t:tt)*) => {
+ $($p)::*::_15 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) $($t:tt)*) => {
+ $($p)::*::_16 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) $($t:tt)*) => {
+ $($p)::*::_17 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) $($t:tt)*) => {
+ $($p)::*::_18 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) $($t:tt)*) => {
+ $($p)::*::_19 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) $($t:tt)*) => {
+ $($p)::*::_20 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) $($t:tt)*) => {
+ $($p)::*::_21 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) $($t:tt)*) => {
+ $($p)::*::_22 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) $($t:tt)*) => {
+ $($p)::*::_23 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) $($t:tt)*) => {
+ $($p)::*::_24 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) $($t:tt)*) => {
+ $($p)::*::_25 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) $($t:tt)*) => {
+ $($p)::*::_26 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) $($t:tt)*) => {
+ $($p)::*::_27 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) $($t:tt)*) => {
+ $($p)::*::_28 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) $($t:tt)*) => {
+ $($p)::*::_29 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) $($t:tt)*) => {
+ $($p)::*::_30 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) $($t:tt)*) => {
+ $($p)::*::_31 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) $($t:tt)*) => {
+ $($p)::*::_32 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) $($t:tt)*) => {
+ $($p)::*::_33 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) $($t:tt)*) => {
+ $($p)::*::_34 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) $($t:tt)*) => {
+ $($p)::*::_35 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) $($t:tt)*) => {
+ $($p)::*::_36 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) $($t:tt)*) => {
+ $($p)::*::_37 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) $($t:tt)*) => {
+ $($p)::*::_38 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) $($t:tt)*) => {
+ $($p)::*::_39 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) $($t:tt)*) => {
+ $($p)::*::_40 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) $($t:tt)*) => {
+ $($p)::*::_41 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) $($t:tt)*) => {
+ $($p)::*::_42 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) $($t:tt)*) => {
+ $($p)::*::_43 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) $($t:tt)*) => {
+ $($p)::*::_44 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) $($t:tt)*) => {
+ $($p)::*::_45 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) $($t:tt)*) => {
+ $($p)::*::_46 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) $($t:tt)*) => {
+ $($p)::*::_47 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) $($t:tt)*) => {
+ $($p)::*::_48 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) $($t:tt)*) => {
+ $($p)::*::_49 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) $($t:tt)*) => {
+ $($p)::*::_50 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) $($t:tt)*) => {
+ $($p)::*::_51 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) $($t:tt)*) => {
+ $($p)::*::_52 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) $($t:tt)*) => {
+ $($p)::*::_53 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) $($t:tt)*) => {
+ $($p)::*::_54 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) $($t:tt)*) => {
+ $($p)::*::_55 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) $($t:tt)*) => {
+ $($p)::*::_56 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) $($t:tt)*) => {
+ $($p)::*::_57 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) $($t:tt)*) => {
+ $($p)::*::_58 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) $($t:tt)*) => {
+ $($p)::*::_59 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) $($t:tt)*) => {
+ $($p)::*::_60 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) $($t:tt)*) => {
+ $($p)::*::_61 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) $($t:tt)*) => {
+ $($p)::*::_62 $($t)*
+ };
+ ($($p:ident)::*, (_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) $($t:tt)*) => {
+ $($p)::*::_63 $($t)*
+ };
+}