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use std::collections::HashMap;

#[derive(Debug)]
enum Type {
    Num,
    Bool,
    List(Box<Type>),
    Func(Box<Type>, Box<Type>),
}

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diff --git a/src/lib.rs b/src/lib.rs
index 24534a8..8121dd9 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -170,6 +170,11 @@ fn wait_lock<'a, T>(lock: &'a InnerMutex<T>) -> MutexGuard<'a, T> {
     }
 }
 
+#[inline]
+fn poll_lock<'a, T>(lock: &'a InnerMutex<T>) -> Option<MutexGuard<'a, T>> {

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hydra-32t-1m-flume      time:   [89.310 us 90.372 us 91.435 us]                               
Found 6 outliers among 100 measurements (6.00%)
  4 (4.00%) high mild
  2 (2.00%) high severe

hydra-32t-1m-floom      time:   [98.935 us 100.76 us 102.84 us]                               
Found 6 outliers among 100 measurements (6.00%)
  5 (5.00%) high mild
  1 (1.00%) high severe

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Arch Linux, 4 cores, 8 threads, AMD Ryzen 7
===========================================

create-flume            time:   [133.58 ns 133.99 ns 134.43 ns]                         
                        change: [-2.8490% -2.1632% -1.5710%] (p = 0.00 < 0.05)
                        Performance has improved.

create-crossbeam        time:   [189.86 ns 190.24 ns 190.67 ns]                             
                        change: [+1.3594% +1.8473% +2.3118%] (p = 0.00 < 0.05)
                        Performance has regressed.

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#!/usr/bin/env bash

set -e

cweb_version=0.6.26
cweb=https://github.com/koute/cargo-web/releases/download/$cweb_version/cargo-web-x86_64-unknown-linux-gnu.gz
curl -Lo cargo-web.gz $cweb
gunzip cargo-web.gz
chmod u+x cargo-web

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#!/usr/bin/env bash

set -e

cweb_version=0.6.26
cweb=https://github.com/koute/cargo-web/releases/download/$cweb_version/cargo-web-x86_64-unknown-linux-gnu.gz
curl -Lo cargo-web.gz $cweb
gunzip cargo-web.gz
chmod u+x cargo-web

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# Find the length of a list
def len = l ->
    if l = []
    then 0
    else len(:> l) + 1

# Find the nth element in a list
def nth = n -> l ->
    if n < 1
    then <: l

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# Sum types with type parameters
data Maybe T =
  | Some T
  | None

data Pet =
  | Dog
  | Cat
  | Hamster

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const std = struct {
	io: struct {
		print: |msg| {
			__print(msg);
		},
		println: |msg| {
			self.print(msg + "\n");
		},
		input: || {
			__input()

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use std::{
    collections::{HashMap, VecDeque, hash_map::DefaultHasher},
    hash::{Hash, Hasher, BuildHasherDefault, BuildHasher},
};

#[derive(Debug)]
pub enum Error {
    NoSuchHash,
    DuplicateHash,
}