import { Node } from '../../node';
import { IfConditionFunction, IfConditionFunctionProps } from './function';
import { IfConditionNegation, IfConditionNegationProps } from './negation';
import { IfConditionOperation, IfConditionOperationProps } from './operation';
import { IfConditionParenthesized, IfConditionParenthesizedProps } from './parenthesized';
import { IfConditionRaw, IfConditionRawProps } from './raw';
import type { IfConditionSass, IfConditionSassProps } from './sass';
/**
 * The union type of all `if()` condition expressions.
 *
 * @category Expression
 */
export type AnyIfConditionExpression = IfConditionFunction | IfConditionNegation | IfConditionOperation | IfConditionParenthesized | IfConditionRaw | IfConditionSass;
/**
 * `if()` condition expression types.
 *
 * @category Expression
 */
export type IfConditionExpressionType = 'if-condition-function' | 'if-condition-negation' | 'if-condition-operation' | 'if-condition-parenthesized' | 'if-condition-raw' | 'if-condition-sass';
/**
 * The union type of all properties that can be used to construct `if()`
 * condition expressions.
 *
 * @category Expression
 */
export type IfConditionExpressionProps = IfConditionFunctionProps | IfConditionNegationProps | IfConditionOperationProps | IfConditionParenthesizedProps | IfConditionRawProps | IfConditionSassProps;
/**
 * The superclass of `if()` condition expression nodes.
 *
 * An `if()` condition expression is a subexpression that can appear in the
 * condition of a CSS-style `if()` function.
 *
 * @category Expression
 */
export declare abstract class IfConditionExpression extends Node {
    abstract readonly sassType: IfConditionExpressionType;
    abstract clone(overrides?: object): this;
}