import type * as Malloy from '@malloydata/malloy-interfaces';
import type { ExprValue } from '../types/expr-value';
import { ExpressionDef } from '../types/expression-def';
export declare class Boolean extends ExpressionDef {
    readonly value: 'true' | 'false';
    elementType: string;
    constructor(value: 'true' | 'false');
    getExpression(): ExprValue;
    getStableLiteral(): Malloy.LiteralValue;
}