import { ExprCompare } from './expr-compare';
import type { ExpressionDef } from '../types/expression-def';
import type { ExprValue } from '../types/expr-value';
import type { FieldSpace } from '../types/field-space';
export declare class Apply extends ExprCompare {
    readonly left: ExpressionDef;
    readonly right: ExpressionDef;
    elementType: string;
    constructor(left: ExpressionDef, right: ExpressionDef);
    getExpression(fs: FieldSpace): ExprValue;
}