import { Node } from '../node';
import type { BinaryOperationExpression, BinaryOperationExpressionProps } from './binary-operation';
import { BooleanExpression, BooleanExpressionProps } from './boolean';
import { ColorExpression, ColorExpressionProps } from './color';
import { FunctionExpression, FunctionExpressionProps } from './function';
import { IfExpression } from './if';
import { InterpolatedFunctionExpression, InterpolatedFunctionExpressionProps } from './interpolated-function';
import { ListExpression, ListExpressionProps } from './list';
import { MapExpression, MapExpressionProps } from './map';
import { NullExpression, NullExpressionProps } from './null';
import { NumberExpression, NumberExpressionProps } from './number';
import { ParenthesizedExpression, ParenthesizedExpressionProps } from './parenthesized';
import type { SelectorExpression } from './selector';
import type { StringExpression, StringExpressionProps } from './string';
import type { UnaryOperationExpression, UnaryOperationExpressionProps } from './unary-operation';
import type { VariableExpression, VariableExpressionProps } from './variable';
/**
 * The union type of all Sass expressions.
 *
 * @category Expression
 */
export type AnyExpression = BinaryOperationExpression | BooleanExpression | ColorExpression | FunctionExpression | IfExpression | InterpolatedFunctionExpression | ListExpression | MapExpression | NullExpression | NumberExpression | ParenthesizedExpression | SelectorExpression | StringExpression | UnaryOperationExpression | VariableExpression;
/**
 * Sass expression types.
 *
 * @category Expression
 */
export type ExpressionType = 'binary-operation' | 'boolean' | 'color' | 'function-call' | 'if-expr' | 'interpolated-function-call' | 'list' | 'map' | 'null' | 'number' | 'parenthesized' | 'selector-expr' | 'string' | 'unary-operation' | 'variable';
/**
 * The union type of all properties that can be used to construct Sass
 * expressions.
 *
 * @category Expression
 */
export type ExpressionProps = BinaryOperationExpressionProps | BooleanExpressionProps | ColorExpressionProps | FunctionExpressionProps | InterpolatedFunctionExpressionProps | ListExpressionProps | MapExpressionProps | NullExpressionProps | NumberExpressionProps | ParenthesizedExpressionProps | StringExpressionProps | UnaryOperationExpressionProps | VariableExpressionProps;
/**
 * The superclass of Sass expression nodes.
 *
 * An expressions is anything that can appear in a variable value,
 * interpolation, declaration value, and so on.
 *
 * @category Expression
 */
export declare abstract class Expression extends Node {
    abstract readonly sassType: ExpressionType;
    abstract clone(overrides?: object): this;
}