import { ParsingContext } from "../ParsingContext.js";
import { DateRangePart } from "../Types.js";
type CustomDateSyntaxPriority = "first" | "last" | "only";
type CustomDateSyntaxRule = {
    name?: string;
    pattern?: unknown;
    from?: unknown;
    fromFormat?: unknown;
    to?: unknown;
    toFormat?: unknown;
    duration?: unknown;
};
type CompiledCustomDateSyntaxRule = CustomDateSyntaxRule & {
    pattern: string;
    regex: RegExp;
};
export type CompiledCustomDateSyntax = {
    priority: CustomDateSyntaxPriority;
    rules: CompiledCustomDateSyntaxRule[];
};
export declare function getCustomDateSyntax(context: ParsingContext): CompiledCustomDateSyntax | undefined;
export declare function customDateSyntaxPriority(context: ParsingContext): CustomDateSyntaxPriority;
export declare function isCustomDateSyntaxEventStart(line: string, context: ParsingContext): boolean;
export declare function getDateRangeFromCustomDateSyntaxMatch(line: string, i: number, lengthAtIndex: number[], context: ParsingContext): DateRangePart | undefined;
export {};