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import type { FunctionNode, WordNode, Node } from 'postcss-value-parser';
export declare function turnToRad(turn: number): number;
export declare function degToRad(deg: number): number;
export declare function gradToRad(grad: number): number;
export declare function radToDeg(rad: number): number;
export declare function gradToDeg(grad: number): number;
export declare function turnToDeg(turn: number): number;
declare const toRad: {
turn: typeof turnToRad;
deg: typeof degToRad;
grad: typeof gradToRad;
};
declare const toDeg: {
grad: typeof gradToDeg;
turn: typeof turnToDeg;
rad: typeof radToDeg;
};
export declare function filterOnlyWords(node: Node): boolean;
/**
* Try to compute a calculation from a Node.
*
* This validates that the calculation has a valid order which is:
* - `{Number} {Operation} {Number} ...`
*
* Only basic arithmetic operations are allowed, and it has to be separate words
* similarly to how CSS calc works:
*
* - `sin(3.14159 * 2)` -> is valid
* - `sin(3.14159*2)` -> is not valid
*
*
* @param {FunctionNode} nodes Nodes to be parsed
* @param {Boolean} ignoreUnit Whether units are ignored or converted to radians
* @return {FunctionNode} Returns the node, if it managed to calculate, it will
* simplify inner nodes.
* @see https://www.w3.org/TR/css-values-4/#trig-funcs
*/
export declare function computeCalculation(nodes: Node[], ignoreUnit?: boolean): Node[];
export declare function functionNodeToWordNode(fn: FunctionNode): WordNode;
/**
* Formats a number that's intended to be put into CSS.
*
* Due to processing of Number(number.toFixed(decimals)) this will get
* rid of ending zeroes, usually helping with the rounding which is the
* intended effect.
*
* For example, converting 4.71238898038469 radians into deg leads to
* 270.000000000669786 which is going to result as 270 unless a
* precision of 10 is chosen.
*
* @param {Number} number Number to be formatted
* @param {Number} decimals Precision of decimals, CSS doesn't usually handle further than 5.
*/
export declare function formatResultingNumber(number: number, decimals: number): string;
export declare function parseNumber(value: string): false | {
number: any;
unit: string;
};
declare type validateNodeReturn = [WordNode, number] | undefined;
export declare function validateNode(node: FunctionNode, parseUnit?: boolean): validateNodeReturn;
export { toRad, toDeg };