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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,
}

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fn linear_lerp(a: f32, b: f32, x: f32) -> f32 {
    a + (b - a) * x
}

fn cosine_lerp(a: f32, b: f32, x: f32) -> f32 {
    let x = 0.5 - (x.fract() as f32 * f32::consts::PI).cos() * 0.5;
    a + (b - a) * x
}

fn perlin_ext(pos: Vec3<f32>, seed: u32, lerp: fn(f32, f32, f32) -> f32, octaves: usize, freq_factor: f32, scale_factor: f32) -> f32 {

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use std::{
    sync::mpsc,
    thread::{self, JoinHandle},
    collections::{HashMap, HashSet},
};

// Error

#[derive(Debug)]
pub enum Error {

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#!/usr/bin/env bash

set -e

cweb_version=0.6.24
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=0.6.24
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

curl https://sh.rustup.rs -sSf | sh -s - --default-toolchain nightly -y
source ~/.cargo/env

rm -rf target/
rm -f Cargo.lock

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#!/usr/bin/env bash

set -e

mdbook=https://github.com/rust-lang-nursery/mdBook/releases/download/v0.2.1/mdbook-v0.2.1-x86_64-unknown-linux-gnu.tar.gz
curl -Lo mdbook.tar.gz $mdbook
tar -xzvf mdbook.tar.gz
chmod u+x mdbook

./mdbook build

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use std::{
    f32,
    io
};
use minifb::{
    Key,
    WindowOptions,
    Window,
};
use vek::*;