///<summary>
///Returns an action which attempts <paramref name="action"/> first and does
///<paramref name="ifFirstActionFails"/> if it fails.
///</summary>
///<param name="action">The action to try.</param>
///<param name="ifFirstActionFails">The action to do if <paramref name="action"/>
///fails.</param>
///<typeparam name="T"></typeparam>
///<returns></returns>
public static ActionCPS <T> OrElse <T>(this ActionCPS <T> action,
ActionCPS <T> ifFirstActionFails)
{
return(action.WithRescue(e => ifFirstActionFails));
}
///<summary>
///Returns an action which attempts <paramref name="action"/> first, returns <paramref name="defaultResult"/> if
/// it fails.
///</summary>
///<param name="action">The action to try.</param>
///<param name="defaultResult">The result if <paramref name="action"/> fails.</param>
public static ActionCPS <T> WithDefault <T>(this ActionCPS <T> action, T defaultResult)
{
return(action.WithRescue(e => Return(defaultResult)));
}