This is more of a question for advanced type experts. Would it be possible to make a type that only allows positive integers in a string? E.g. "123" and "82739283293237"
In my attempt to use template string types with many unions will hit a wall with
Expression produces a union type that is too complex to represent.(2590)
Also posted this question here
ts-essentials/ts-essentials#388
My attempt for PositiveIntegerString
type Digits = '0' | '1' | '2' | '3' | '4' | '5' | '6' | '7' | '8' | '9';
// Problem: This pattern can not be repeated for too long...
type PositiveIntegerString =${Digits}${Digits | ''}${Digits | ''}${Digits | ''};function processPositiveInteger(input: PositiveIntegerString) {
console.log("Valid positive integer string:", input);
}// Example Usage:
processPositiveInteger("3"); // OK
processPositiveInteger("323"); // OK
processPositiveInteger("1323"); // OK
processPositiveInteger("1322323233"); // Should be OK but is not
processPositiveInteger("-1"); // Error
processPositiveInteger("12.34"); // Error
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