import * as postcss from 'postcss';
import { NodeProps } from '../node';
import type * as sassInternal from '../sass-internal';
import { AnyExpression, Expression, ExpressionProps } from '.';
/** Different binary operations supported by Sass. */
export type BinaryOperator = '=' | 'or' | 'and' | '==' | '!=' | '>' | '>=' | '<' | '<=' | '+' | '-' | '*' | '/' | '%';
/**
 * The initializer properties for {@link BinaryOperationExpression}.
 *
 * @category Expression
 */
export interface BinaryOperationExpressionProps extends NodeProps {
    operator: BinaryOperator;
    left: AnyExpression | ExpressionProps;
    right: AnyExpression | ExpressionProps;
    raws?: BinaryOperationExpressionRaws;
}
/**
 * Raws indicating how to precisely serialize a {@link BinaryOperationExpression}.
 *
 * @category Expression
 */
export interface BinaryOperationExpressionRaws {
    /** The whitespace before the operator. */
    beforeOperator?: string;
    /** The whitespace after the operator. */
    afterOperator?: string;
}
/**
 * An expression representing an inline binary operation Sass.
 *
 * @category Expression
 */
export declare class BinaryOperationExpression extends Expression {
    readonly sassType: "binary-operation";
    raws: BinaryOperationExpressionRaws;
    /**
     * Which operator this operation uses.
     *
     * Note that different operators have different precedence. It's the caller's
     * responsibility to ensure that operations are parenthesized appropriately to
     * guarantee that they're processed in AST order.
     */
    get operator(): BinaryOperator;
    set operator(operator: BinaryOperator);
    private _operator;
    /** The expression on the left-hand side of this operation. */
    get left(): AnyExpression;
    set left(left: AnyExpression | ExpressionProps);
    private _left;
    /** The expression on the right-hand side of this operation. */
    get right(): AnyExpression;
    set right(right: AnyExpression | ExpressionProps);
    private _right;
    constructor(defaults: BinaryOperationExpressionProps);
    /** @hidden */
    constructor(_: undefined, inner: sassInternal.BinaryOperationExpression);
    clone(overrides?: Partial<BinaryOperationExpressionProps>): this;
    toJSON(): object;
    /** @hidden */
    toJSON(_: string, inputs: Map<postcss.Input, number>): object;
    /** @hidden */
    toString(): string;
    /** @hidden */
    get nonStatementChildren(): ReadonlyArray<AnyExpression>;
}