/** 样式单位 */
export declare enum StyleUnitEnum {
    percentage = "%",
    px = "px",
    em = "em",
    rem = "rem",
    vw = "vw",
    vh = "vh",
    vmax = "vmax",
    vmin = "vmin"
}
/** 样式属性通用值 */
export declare enum StyleBaseValueEnum {
    inherit = "inherit",
    initial = "initial",
    unset = "unset"
}
export declare enum TypeEnum {
    ID = "ID",
    Number = "NUMBER",
    Percentage = "PERCENTAGE",
    String = "STRING",
    Dimension = "DIMENSION",
    Hash = "HASH",
    Url = "URL",
    Sequence = "SEQUENCE",
    Expression = "EXPRESSION",
    Function = "FUNCTION",
    Declaration = "DECLARATION"
}
export interface PrimitiveVal<T = string, V = any> {
    type: T;
    value: V;
}
export interface UnitVal extends PrimitiveVal<string, number> {
    unit: string;
}
export interface IdentVal extends PrimitiveVal<TypeEnum.ID, string> {
    type: TypeEnum.ID;
    value: string;
    vendorPrefix?: string;
}
export declare type NumberValue = PrimitiveVal<TypeEnum.Number, number>;
export interface PercentageVal extends PrimitiveVal<TypeEnum.Percentage, number> {
    unit: StyleUnitEnum.percentage;
}
export declare type StringValue = PrimitiveVal<TypeEnum.String, string>;
export interface DimensionValue extends PrimitiveVal<TypeEnum.Dimension, number> {
    unit: string;
}
export declare type HashValue = PrimitiveVal<TypeEnum.Hash, string>;
export interface UrlValue extends PrimitiveVal<TypeEnum.Url, string> {
    name: IdentVal;
}
export declare type SequenceValue = PrimitiveVal<TypeEnum.Sequence, DeclarationValue[]>;
export interface Expression {
    type: TypeEnum.Expression;
    operator: string;
    lhs: NumberValue | PercentageVal | DimensionValue;
    rhs: NumberValue | PercentageVal | DimensionValue;
}
export interface FunctionValue extends PrimitiveVal<TypeEnum.Function, undefined> {
    name: string | IdentVal;
    parameters: DeclarationValue;
}
export declare type DeclarationValue = IdentVal | NumberValue | PercentageVal | StringValue | DimensionValue | UrlValue | FunctionValue | SequenceValue;
export interface Declaration {
    type: TypeEnum.Declaration;
    property: PrimitiveVal<TypeEnum.ID, string>;
    value: DeclarationValue;
}