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use wasmrs_runtime::ConditionallySafe;

#[derive(PartialEq, Eq, Clone)]
/// The [Signal] is the wrapper payload that wasmrx types pass around.
pub enum Signal<Item, Err>
where
  Item: ConditionallySafe,
  Err: ConditionallySafe,
{
  /// A success value.
  Ok(Item),
  /// An error value.
  Err(Err),
  /// An internal signal.
  Complete,
}

impl<Item, Err> std::fmt::Debug for Signal<Item, Err>
where
  Item: ConditionallySafe + std::fmt::Debug,
  Err: ConditionallySafe + std::fmt::Debug,
{
  fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
    match self {
      Self::Ok(arg0) => f.debug_tuple("Ok").field(arg0).finish(),
      Self::Err(arg0) => f.debug_tuple("Err").field(arg0).finish(),
      Self::Complete => f.write_str("Complete"),
    }
  }
}