fluture/src/dispatchers/done.mjs

FantasyLand compliant (monadic) alternative to Promises

import {isFuture} from '../future';
import {partial1} from '../internal/utils';
import {isFunction} from '../internal/predicates';
import {throwInvalidArgument, throwInvalidFuture} from '../internal/throw';

function done$callback(callback, m){
  if(!isFuture(m)) throwInvalidFuture('done', 1, m);
  return m.done(callback);
}

export function done(callback, m){
  if(!isFunction(callback)) throwInvalidArgument('done', 0, 'be a Function', callback);
  if(arguments.length === 1) return partial1(done$callback, callback);
  return done$callback(callback, m);
}