[V3] Support template literals

Hello 👋

I recently encountered a case, where my schema returned a string, but a function accept only a TS template string

Here is an example showing the issue: https://codesandbox.io/s/snowy-river-n2ih2?file=/src/index.ts

Is there a way, currently or in the future, to be able to do this:

const str = z.template(`${z.number()}.${z.number()}.${z.number()}`)
type Str = z.infer<typeof str>
// => Str: `${number}.${number}.${number}`

[colinhacks]

Good idea! I definitely want to support this eventually.

For now, you’ll have to implement this with z.custom:

const literal = z.custom<`${number}.${number}.${number}`>((val) =>
  /^\d+\.\d+\.\d+$/g.test(val as string)
);

[alexburner]

Stale Bot, no! We still care ❤️