import { PREDICATE_OPERATORS } from '../../constants';
import { AstNode } from './common';
import { Operand } from './operand';
export type PredicateOperatorValue = (typeof PREDICATE_OPERATORS)[number];
/**
 * A time predicate for a temporal JQL clause.
 */
export interface Predicate extends AstNode {
    /**
     * The operator between the field and the operand.
     */
    operator: PredicateOperator;
    /**
     * The operand applied to the operator.
     */
    operand: Operand | void;
}
/**
 * The operator used in a time predicate.
 */
export interface PredicateOperator extends AstNode {
    /**
     * Literal value for a predicate (with formatting preserved).
     */
    text: string;
    /**
     * Enum constant representation of the predicate value.
     */
    value: PredicateOperatorValue;
}
export declare const isPredicateOperator: (operator: string) => operator is "after" | "before" | "by" | "during" | "from" | "on" | "to";