/**
 * Jexl's abstract syntax tree
 */
type Ast =
    | { type: "UnaryExpression"; operator: string; right: Ast }
    | { type: "BinaryExpression"; operator: string; left: Ast; right: Ast }
    | { type: "ConditionalExpression"; test: Ast; consequent: Ast; alternate: Ast }
    | { type: "FilterExpression"; relative: boolean; expr: Ast; subject: Ast }
    | { type: "Literal"; value: string | number | boolean }
    | { type: "ArrayLiteral"; value: Ast[] }
    | { type: "ObjectLiteral"; value: { [key: string]: Ast } }
    | { type: "Identifier"; value: string; from?: Ast; relative?: boolean }
    | { type: "FunctionCall"; name: string; pool: "functions" | "transforms"; args: Ast[] };

export default Ast;