Function runChecks

packages/zod/src/v4/core/schemas.ts:218–260

(
      payload: ParsePayload,
      checks: checks.$ZodCheck<never>[],
      ctx?: ParseContextInternal | undefined
    )

    });
  } else {
    const runChecks = (
      payload: ParsePayload,
      checks: checks.$ZodCheck<never>[],
      ctx?: ParseContextInternal | undefined
    ): util.MaybeAsync<ParsePayload> => {
      let isAborted = util.aborted(payload);

      let asyncResult!: Promise<unknown> | undefined;
      for (const ch of checks) {
        if (ch._zod.def.when) {
          if (util.explicitlyAborted(payload)) continue;
          const shouldRun = ch._zod.def.when(payload);
          if (!shouldRun) continue;
        } else if (isAborted) {
          continue;
        }
        const currLen = payload.issues.length;
        const _ = ch._zod.check(payload as any) as any as ParsePayload;

        if (_ instanceof Promise && ctx?.async === false) {
          throw new core.$ZodAsyncError();
        }
        if (asyncResult || _ instanceof Promise) {
          asyncResult = (asyncResult ?? Promise.resolve()).then(async () => {
            await _;
            const nextLen = payload.issues.length;
            if (nextLen === currLen) return;
            if (!isAborted) isAborted = util.aborted(payload, currLen);
          });
        } else {
          const nextLen = payload.issues.length;
          if (nextLen === currLen) continue;
          if (!isAborted) isAborted = util.aborted(payload, currLen);
        }
      }

      if (asyncResult) {
        return asyncResult.then(() => {
          return payload;
        });
      }
      return payload;
    };

    const handleCanaryResult = (canary: ParsePayload, payload: ParsePayload, ctx: ParseContextInternal) => {
      // abort if the canary is aborted