Function extern_spec_T_E_Result_T_E_is_ok 

pub fn extern_spec_T_E_Result_T_E_is_ok<T, E>(self_: &Result<T, E>) -> bool

extern spec for Result<T, E>::is_ok

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

terminates

ghost

ensures

result == exists<t: T> *self == Ok(t)