import { IEnumerable } from '../types';
import { EqualityComparer } from '../types';
/**
 * Produces the set intersection of two sequences.
 * @typeparam TSource The type of source elements.
 * @param src The source iterable.
 * @param second An IEnumerable<T> whose distinct elements that also appear in the first sequence will be returned.
 * @returns A sequence that contains the elements that form the set intersection of two sequences.
 */
export declare function intersect<TSource>(src: Iterable<TSource>, second: Iterable<TSource>): IEnumerable<TSource>;
/**
 * Produces the set intersection of two sequences.
 * @typeparam TSource The type of source elements.
 * @param src The source iterable.
 * @param second An IEnumerable<T> whose distinct elements that also appear in the first sequence will be returned.
 * @returns A sequence that contains the elements that form the set intersection of two sequences.
 */
export declare function intersect<TSource>(src: Iterable<TSource>, ...second: Iterable<TSource>[]): IEnumerable<TSource>;
/**
 * Produces the set intersection of two sequences.
 * @typeparam TSource The type of source elements.
 * @param src The source iterable.
 * @param second An IEnumerable<T> whose distinct elements that also appear in the first sequence will be returned.
 * @param equalityComparer A function to compare keys.
 * @returns A sequence that contains the elements that form the set intersection of two sequences.
 */
export declare function intersect<TSource>(src: Iterable<TSource>, second: Iterable<TSource>, equalityComparer: EqualityComparer<TSource>): IEnumerable<TSource>;
/**
 * Produces the set intersection of two sequences.
 * @typeparam TSource The type of source elements.
 * @param src The source iterable.
 * @param second An IEnumerable<T> whose distinct elements that also appear in the first sequence will be returned.
 * @param third An IEnumerable<T> whose distinct elements that also appear in the first sequence will be returned.
 * @param equalityComparer A function to compare keys.
 * @returns A sequence that contains the elements that form the set intersection of two sequences.
 */
export declare function intersect<TSource>(src: Iterable<TSource>, second: Iterable<TSource>, third: Iterable<TSource>, equalityComparer: EqualityComparer<TSource>): IEnumerable<TSource>;
/**
 * Produces the set intersection of two sequences.
 * @typeparam TSource The type of source elements.
 * @param src The source iterable.
 * @param second An IEnumerable<T> whose distinct elements that also appear in the first sequence will be returned.
 * @param third An IEnumerable<T> whose distinct elements that also appear in the first sequence will be returned.
 * @param fourth An IEnumerable<T> whose distinct elements that also appear in the first sequence will be returned.
 * @param equalityComparer A function to compare keys.
 * @returns A sequence that contains the elements that form the set intersection of two sequences.
 */
export declare function intersect<TSource>(src: Iterable<TSource>, second: Iterable<TSource>, third: Iterable<TSource>, fourth: Iterable<TSource>, equalityComparer: EqualityComparer<TSource>): IEnumerable<TSource>;
/**
 * Produces the set intersection of two sequences according to a specified key selector function.
 * @typeparam TSource The type of source elements.
 * @typeparam TKey The type of key to identify elements by.
 * @param src The source iterable.
 * @param second An IEnumerable<T> whose distinct elements that also appear in the first sequence will be returned.
 * @param keySelector A function to extract the key for each element.
 * @returns A sequence that contains the elements that form the set intersection of two sequences.
 */
export declare function intersectBy<TSource, TKey>(src: Iterable<TSource>, second: Iterable<TKey>, keySelector: (item: TSource) => TKey): IEnumerable<TSource>;
/**
 * Produces the set intersection of two sequences according to a specified key selector function.
 * @typeparam TSource The type of source elements.
 * @typeparam TKey The type of key to identify elements by.
 * @param src The source iterable.
 * @param second An IEnumerable<T> whose distinct elements that also appear in the first sequence will be returned.
 * @param third An IEnumerable<T> whose distinct elements that also appear in the first sequence will be returned.
 * @param keySelector A function to extract the key for each element.
 * @returns A sequence that contains the elements that form the set intersection of two sequences.
 */
export declare function intersectBy<TSource, TKey>(src: Iterable<TSource>, second: Iterable<TKey>, third: Iterable<TSource>, keySelector: (item: TSource) => TKey): IEnumerable<TSource>;
/**
 * Produces the set intersection of two sequences according to a specified key selector function.
 * @typeparam TSource The type of source elements.
 * @typeparam TKey The type of key to identify elements by.
 * @param src The source iterable.
 * @param second An IEnumerable<T> whose distinct elements that also appear in the first sequence will be returned.
 * @param third An IEnumerable<T> whose distinct elements that also appear in the first sequence will be returned.
 * @param fourth An IEnumerable<T> whose distinct elements that also appear in the first sequence will be returned.
 * @param keySelector A function to extract the key for each element.
 * @returns A sequence that contains the elements that form the set intersection of two sequences.
 */
export declare function intersectBy<TSource, TKey>(src: Iterable<TSource>, second: Iterable<TKey>, third: Iterable<TSource>, fourth: Iterable<TSource>, keySelector: (item: TSource) => TKey): IEnumerable<TSource>;
/**
 * Produces the set intersection of two sequences according to a specified key selector function.
 * @typeparam TSource The type of source elements.
 * @typeparam TKey The type of key to identify elements by.
 * @param src The source iterable.
 * @param second An IEnumerable<T> whose distinct elements that also appear in the first sequence will be returned.
 * @param keySelector A function to extract the key for each element.
 * @param equalityComparer A function to compare keys.
 * @returns A sequence that contains the elements that form the set intersection of two sequences.
 */
export declare function intersectBy<TSource, TKey>(src: Iterable<TSource>, second: Iterable<TKey>, keySelector: (item: TSource) => TKey, equalityComparer: EqualityComparer<TKey>): IEnumerable<TSource>;
/**
 * Produces the set intersection of two sequences according to a specified key selector function.
 * @typeparam TSource The type of source elements.
 * @typeparam TKey The type of key to identify elements by.
 * @param src The source iterable.
 * @param second An IEnumerable<T> whose distinct elements that also appear in the first sequence will be returned.
 * @param third An IEnumerable<T> whose distinct elements that also appear in the first sequence will be returned.
 * @param keySelector A function to extract the key for each element.
 * @param equalityComparer A function to compare keys.
 * @returns A sequence that contains the elements that form the set intersection of two sequences.
 */
export declare function intersectBy<TSource, TKey>(src: Iterable<TSource>, second: Iterable<TKey>, third: Iterable<TSource>, keySelector: (item: TSource) => TKey, equalityComparer: EqualityComparer<TKey>): IEnumerable<TSource>;
/**
 * Produces the set intersection of two sequences according to a specified key selector function.
 * @typeparam TSource The type of source elements.
 * @typeparam TKey The type of key to identify elements by.
 * @param src The source iterable.
 * @param second An IEnumerable<T> whose distinct elements that also appear in the first sequence will be returned.
 * @param third An IEnumerable<T> whose distinct elements that also appear in the first sequence will be returned.
 * @param fourth An IEnumerable<T> whose distinct elements that also appear in the first sequence will be returned.
 * @param keySelector A function to extract the key for each element.
 * @param equalityComparer A function to compare keys.
 * @returns A sequence that contains the elements that form the set intersection of two sequences.
 */
export declare function intersectBy<TSource, TKey>(src: Iterable<TSource>, second: Iterable<TKey>, third: Iterable<TSource>, fourth: Iterable<TSource>, keySelector: (item: TSource) => TKey, equalityComparer: EqualityComparer<TKey>): IEnumerable<TSource>;
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