Throw ParseError on negative length constraint

[TizzySaurus]

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🔎 Search Terms

negative length constraint, max length, min length

🧩 Context

• ArkType version: 2.0.0-dev.16
• TypeScript version (5.1+): 5.4.5
• Other context you think may be relevant (JS flavor, OS, etc.): N/A

🧑‍💻 Repro

ArkType currently allows negative length constraints for both strings and arrays, which doesn't really make sense. IMO negative length constraints should be entirely disallowed, but at a minimum it shouldn't allow setting the maximum length to a negative number since no value will ever satisfy this.

Current Behaviour

import { type } from "arktype";

const t = type("string[]<-1");
console.log(t.json) // {sequence: 'string',  proto: 'Array',  minLength: { exclusive: true, rule: -1 }}

Expected Behaviour

import { type } from "arktype";

const t = type("string[]<-1");
console.log(t.json) // errors, stating that length constraint cannot be negative