Type Alias ListSetLenFn 

pub type ListSetLenFn = unsafe fn(PtrMut, usize);

Set the length of a list (for direct-fill operations).

Safety

• The list parameter must point to aligned, initialized memory of the correct type.
• The new length must not exceed the list’s capacity.
• All elements at indices 0..new_len must be properly initialized.
• For types that are not Copy, the caller must ensure no double-drops occur.