import type { TimestampUnit } from '../../../model/malloy_types';
import type { ExprValue } from '../types/expr-value';
import { ExpressionDef } from '../types/expression-def';
import type { FieldSpace } from '../types/field-space';
import { Range } from './range';
import type * as Malloy from '@malloydata/malloy-interfaces';
/**
 * GranularTime is a moment in time which ALSO has a "granularity"
 * commonly this are created by applying ".datePart" to an expression
 * 1) They have a value, which is the moment in time
 * 2) When used in a comparison, they act like a range, for the
 *    duration of 1 unit of granularity
 */
export declare class ExprGranularTime extends ExpressionDef {
    readonly expr: ExpressionDef;
    readonly units: TimestampUnit;
    readonly truncate: boolean;
    elementType: string;
    legalChildTypes: import("../../../model/malloy_types").TypeDesc[];
    constructor(expr: ExpressionDef, units: TimestampUnit, truncate: boolean);
    granular(): boolean;
    drillExpression(): Malloy.Expression | undefined;
    getExpression(fs: FieldSpace): ExprValue;
    toRange(fs: FieldSpace): Range;
}