Function CSTL_vector_truncate

pub unsafe extern "C" fn CSTL_vector_truncate(
    instance: CSTL_VectorRef,
    type_: CSTL_Type,
    drop: CSTL_DropTypeCRef,
    new_size: usize,
)

Truncates the vector to contain new_size elements, removing any excess.

Has no effect if new_size >= CSTL_vector_size(instance, type).

If new_size > CSTL_vector_max_size(type) (vector too long) this function has no effect and returns false, otherwise it returns true.