Function castReadonly

castReadonly<T>(mutable: T): Readonly<T>
Casts a mutable type T to its Readonly<T> equivalent.

This is a safe type assertion that adds immutability constraints at the type level. The runtime value remains unchanged - only TypeScript's view of it becomes readonly. This helps prevent accidental mutations and makes code intentions clearer.
Type Parameters
- T
  The type of the mutable value
Parameters
- mutable: T
  The mutable value to cast to readonly
Returns Readonly<T>
The same value with readonly modifiers added to its type
See
- castDeepReadonly - For deeply nested structures
- castMutable - For the opposite operation (use with caution)
- Defined in src/others/cast-readonly.mts:15