import { IStep, TPattern } from "./Step";
export declare const stepExpressions: Map<string, IStepExpressionDef>;
type TParser = (...value: any[]) => any | any[];
interface IStepExpressionDef {
    key: string;
    pattern: RegExp;
    parser: TParser;
}
export interface IStepExpression {
    regexp: RegExp;
    parsers: TParser[];
}
export declare function defineExpression(expr: IStepExpressionDef): void;
export declare function expressionFromString(stepPattern: string): IStepExpression;
export declare function expressionFromRegexp(stepPattern: RegExp): IStepExpression;
export declare function extractVariables(step: IStep): any[];
export declare function stepExpressionFactory(pattern: TPattern): IStepExpression;
export {};