helpers.rs
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helpers.rs
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	use anyhow::Error;
	use macros_rs::str;
	use std::path::Path;
	use std::sync::atomic::{AtomicUsize, Ordering};

	pub struct Id {
	pub counter: AtomicUsize,
	}

	impl Id {
	pub fn new(start: usize) -> Self { Id { counter: AtomicUsize::new(start) } }
	pub fn next(&self) -> usize { self.counter.fetch_add(1, Ordering::SeqCst) }
	}

	pub struct Exists;
	impl Exists {
	pub fn folder(dir_name: String) -> Result<bool, Error> { Ok(Path::new(str!(dir_name)).is_dir()) }
	pub fn file(file_name: String) -> Result<bool, Error> { Ok(Path::new(str!(file_name)).exists()) }
	}

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