import { Token } from './token';
export interface Expr {
    getChildren(): Expr[];
    rp(): string;
    toString(): string;
}
export declare class Leaf implements Expr {
    token: Token;
    constructor(token: Token);
    getChildren(): Expr[];
    rp(): string;
    toString(): string;
}
export declare class Node implements Expr {
    operator: Token;
    operands: Expr[];
    children: Expr[];
    constructor(operator: Token, ...operands: Expr[]);
    getChildren(): Expr[];
    rp(): string;
    toString(): string;
}
export declare class FunctionCall implements Expr {
    func: Expr;
    args: Expr[];
    constructor(func: Expr, args?: Expr[]);
    getChildren(): Expr[];
    rp(): string;
    toString(): string;
}
export declare class LambdaFunction implements Expr {
    body: Expr;
    parameters: Leaf[];
    constructor(parameters: Token[], body: Expr);
    getChildren(): Expr[];
    rp(): string;
    toString(): string;
}
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