declare const flagSymbol: unique symbol;
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declare function arg<T extends arg.Spec>(
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spec: T,
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options?: arg.Options
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): arg.Result<T>;
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declare namespace arg {
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export function flag<T>(fn: T): T & { [flagSymbol]: true };
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export const COUNT: Handler<number> & { [flagSymbol]: true };
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export type Handler<T = any> = (
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value: string,
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name: string,
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previousValue?: T
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) => T;
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export class ArgError extends Error {
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constructor(message: string, code: string);
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code: string;
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}
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export interface Spec {
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[key: string]: string | Handler | [Handler];
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}
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export type Result<T extends Spec> = { _: string[] } & {
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[K in keyof T]?: T[K] extends Handler
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? ReturnType<T[K]>
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: T[K] extends [Handler]
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? Array<ReturnType<T[K][0]>>
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: never;
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};
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export interface Options {
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argv?: string[];
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permissive?: boolean;
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stopAtPositional?: boolean;
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}
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}
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export = arg;
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