var lift = require('./lift');
var not = require('./not');


/**
 * Takes a function `f` and returns a function `g` such that if called with the same arguments
 * when `f` returns a "truthy" value, `g` returns `false` and when `f` returns a "falsy" value `g` returns `true`.
 *
 * `R.complement` may be applied to any functor
 *
 * @func
 * @memberOf R
 * @since v0.12.0
 * @category Logic
 * @sig (*... -> *) -> (*... -> Boolean)
 * @param {Function} f
 * @return {Function}
 * @see R.not
 * @example
 *
 *      var isNotNil = R.complement(R.isNil);
 *      isNil(null); //=> true
 *      isNotNil(null); //=> false
 *      isNil(7); //=> false
 *      isNotNil(7); //=> true
 */
module.exports = lift(not);