/**
 * a {@link TwolayerGreedy} that calls another {@link Twolayer} before greedily
 * swapping nodes to minimize crossings.
 *
 * @packageDocumentation
 */
import type { Twolayer } from ".";
/**
 * a {@link Twolayer} that greedily swaps nodes
 *
 * Create with {@link twolayerGreedy}.
 */
export interface TwolayerGreedy<Op extends Twolayer = Twolayer> extends Twolayer<Op extends Twolayer<infer N, never> ? N : never, Op extends Twolayer<never, infer L> ? L : never> {
    /**
     * set the base {@link Twolayer} for this operator
     *
     * Greedy will first call its base operator, and the greedily swap nodes to
     * minimize edge crossings. To only greedily minimize edge crossings, set
     * base to a no op.
     *
     * (default: noop)
     */
    base<NewOp extends Twolayer>(val: NewOp): TwolayerGreedy<NewOp>;
    /**
     * get the current base operator
     */
    base(): Op;
    /**
     * set whether this operator should scan to find swaps.
     *
     * Using the scan method takes longer (quadratic in layer size, versus
     * linear), but produces fewer crossings.
     *
     * (default: `false`)
     */
    scan(val: boolean): TwolayerGreedy<Op>;
    /**
     * get the current scan setting
     */
    scan(): boolean;
    /** @internal flag indicating that this is built in to d3dag and shouldn't error in specific instances */
    readonly d3dagBuiltin: true;
}
/** default greedy operator */
export type DefaultTwolayerGreedy = TwolayerGreedy<Twolayer<unknown, unknown>>;
/**
 * create a default {@link TwolayerGreedy}
 *
 * This may be faster than {@link twolayerOpt}, but should produce better
 * layouts than {@link twolayerAgg} on its own.
 *
 * @example
 *
 * ```ts
 * const layout = sugiyama().decross(decrossTwoLayer().order(twolayerGreedy()));
 * ```
 */
export declare function twolayerGreedy(...args: never[]): DefaultTwolayerGreedy;