Class ZodTuple

packages/zod/src/v3/types.ts:3395–3477

export type AnyZodTuple = ZodTuple<[ZodTypeAny, ...ZodTypeAny[]] | [], ZodTypeAny | null>;
// type ZodTupleItems = [ZodTypeAny, ...ZodTypeAny[]];
export class ZodTuple<
  T extends ZodTupleItems | [] = ZodTupleItems,
  Rest extends ZodTypeAny | null = null,
> extends ZodType<OutputTypeOfTupleWithRest<T, Rest>, ZodTupleDef<T, Rest>, InputTypeOfTupleWithRest<T, Rest>> {
  _parse(input: ParseInput): ParseReturnType<this["_output"]> {
    const { status, ctx } = this._processInputParams(input);
    if (ctx.parsedType !== ZodParsedType.array) {
      addIssueToContext(ctx, {
        code: ZodIssueCode.invalid_type,
        expected: ZodParsedType.array,
        received: ctx.parsedType,
      });
      return INVALID;
    }

    if (ctx.data.length < this._def.items.length) {
      addIssueToContext(ctx, {
        code: ZodIssueCode.too_small,
        minimum: this._def.items.length,
        inclusive: true,
        exact: false,
        type: "array",
      });

      return INVALID;
    }

    const rest = this._def.rest;

    if (!rest && ctx.data.length > this._def.items.length) {
      addIssueToContext(ctx, {
        code: ZodIssueCode.too_big,
        maximum: this._def.items.length,
        inclusive: true,
        exact: false,
        type: "array",
      });
      status.dirty();
    }

    const items = ([...ctx.data] as any[])
      .map((item, itemIndex) => {
        const schema = this._def.items[itemIndex] || this._def.rest;
        if (!schema) return null as any as SyncParseReturnType<any>;
        return schema._parse(new ParseInputLazyPath(ctx, item, ctx.path, itemIndex));
      })
      .filter((x) => !!x); // filter nulls

    if (ctx.common.async) {
      return Promise.all(items).then((results) => {
        return ParseStatus.mergeArray(status, results);
      });
    } else {
      return ParseStatus.mergeArray(status, items as SyncParseReturnType[]);
    }
  }

  get items() {