Function castDeepReadonly

castDeepReadonly<T>(mutable: T): DeepReadonly<T>
Casts a mutable type T to its DeepReadonly<T> equivalent, recursively adding readonly modifiers.

This is a safe type assertion that adds immutability constraints at ALL levels of nesting. Provides complete protection against mutations in complex data structures. The runtime value is unchanged - only TypeScript's type checking is enhanced.
Type Parameters
- T
  The type of the mutable value
Parameters
- mutable: T
  The mutable value to cast to deeply readonly
Returns DeepReadonly<T>
The same value with readonly modifiers recursively added to all properties
See
- castReadonly - For shallow readonly casting
- castDeepMutable - For the opposite operation (use with extreme caution)
- Defined in src/others/cast-readonly.mts:34