Function extern_spec_T_A_Vec_T_A_len 

pub fn extern_spec_T_A_Vec_T_A_len<T, A: Allocator>(self_: &Vec<T, A>) -> usize

extern spec for Vec<T, A>::len

This is not a real function: its only use is for documentation.

terminates

ghost

ensures

result@ == self@.len()