Zod Preprocess returning unknown type

[enchorb]

The type returned from z.preprocess is giving out type "unknown"

Some Examples:

export const string_validation = z.preprocess(
  (value) => {
    if (typeof value !== 'string') return value;
    return value.trim().replace(/\s\s+/g, ' ');
  },
  z.string().min(1)
);

export const boolean_validation = z.preprocess((bool) => {
  if (typeof bool === 'boolean') return bool;
  return bool === 'true';
}, z.boolean());

export const number_validation = z.preprocess(
  (num) => (!num && num !== 0 ? num : Number(num)),
  z.number()
);

[samchungy]

This depends on what type util you're using to infer the type? Are you using infer, input or output?