import { ExprAggregateFunction } from './expr-aggregate-function';
import type { ExpressionDef } from '../types/expression-def';
import type { ExprValue } from '../types/expr-value';
export declare class ExprMax extends ExprAggregateFunction {
    legalChildTypes: import("../../..").TypeDesc[];
    constructor(expr: ExpressionDef);
    returns(ev: ExprValue): ExprValue;
}