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mod aggregated; pub use aggregated::*;
mod cell; pub use cell::*;
mod context; pub use context::*;
mod dict; pub use dict::*;
mod sequence; pub use sequence::*;
mod time; pub use time::*;

#[cfg(test)] mod test;

pub trait Mergable: Sized {
	type Diff;

	fn merge(&mut self, other: Self) {
		self.apply(Mergable::diff(&other, self))
			.expect("Implementation error")
	}

	/** Produce a diff.
	 *
	 * The result will contain all of the information in `self` that isn't present in `that`.
	 */
	fn diff(&self, that: &Self) -> Self::Diff;

	fn apply(&mut self, diff: Self::Diff) -> Result<(), ApplyError>;
}

#[derive(Debug,thiserror::Error)]
#[non_exhaustive]
pub enum ApplyError {
	#[error("Apply target missing critical information: {0:?}")]
	Missing(String),
}

#[derive(Clone,Debug)]
pub struct Opaque<T>(T);