import { CypherASTNode } from "../../CypherASTNode";
import type { CypherEnvironment } from "../../Environment";
import type { Expr } from "../../types";
/**
 * The concatenation operator (`||`) generated by {@link concat}
 * @group Operators
 * @category String
 */
export declare class ConcatOp extends CypherASTNode {
    private readonly exprs;
    /** @internal */
    constructor(exprs: Expr[]);
    /**
     * @internal
     */
    getCypher(env: CypherEnvironment): string;
}
/** Concat (||) operator. This operator may be used for concatenating strings. For concatenating Cypher builder clauses use `utils.concat`
 * @see {@link https://neo4j.com/docs/cypher-manual/current/syntax/operators/#syntax-concatenating-two-strings-doublebar | Cypher Documentation}
 * @group Operators
 * @category String
 * @since Neo4j 5.19
 */
export declare function concat(leftExpr: Expr, rightExpr: Expr): ConcatOp;
export declare function concat(...exprs: Expr[]): ConcatOp;