import * as postcss from 'postcss';
import type { AtRuleRaws } from 'postcss/lib/at-rule';
import { AnyExpression, ExpressionProps } from '../expression';
import type * as sassInternal from '../sass-internal';
import { ChildNode, ContainerProps, NewNode, Statement, StatementWithChildren } from '.';
import { _AtRule } from './at-rule-internal';
/**
 * The set of raws supported by {@link WhileRule}.
 *
 * @category Statement
 */
export type WhileRuleRaws = Omit<AtRuleRaws, 'params'>;
/**
 * The initializer properties for {@link WhileRule}.
 *
 * @category Statement
 */
export type WhileRuleProps = ContainerProps & {
    raws?: WhileRuleRaws;
    whileCondition: AnyExpression | ExpressionProps;
};
/**
 * A `@while` rule. Extends [`postcss.AtRule`].
 *
 * [`postcss.AtRule`]: https://postcss.org/api/#atrule
 *
 * @category Statement
 */
export declare class WhileRule extends _AtRule<Partial<WhileRuleProps>> implements Statement {
    readonly sassType: "while-rule";
    parent: StatementWithChildren | undefined;
    raws: WhileRuleRaws;
    nodes: ChildNode[];
    get name(): string;
    set name(value: string);
    get params(): string;
    set params(value: string | number | undefined);
    /** The expression whose value determines whether to continue looping. */
    get whileCondition(): AnyExpression;
    set whileCondition(whileCondition: AnyExpression | ExpressionProps);
    private _whileCondition?;
    constructor(defaults: WhileRuleProps);
    /** @hidden */
    constructor(_: undefined, inner: sassInternal.WhileRule);
    clone(overrides?: Partial<WhileRuleProps>): this;
    toJSON(): object;
    /** @hidden */
    toJSON(_: string, inputs: Map<postcss.Input, number>): object;
    /** @hidden */
    toString(stringifier?: postcss.Stringifier | postcss.Syntax): string;
    /** @hidden */
    get nonStatementChildren(): ReadonlyArray<AnyExpression>;
    /** @hidden */
    normalize(node: NewNode, sample?: postcss.Node): ChildNode[];
}