Function extern_spec_T_Option_T_unwrap_or 

pub fn extern_spec_T_Option_T_unwrap_or<T>(self_: Option<T>, default: T) -> T

extern spec for Option<T>::unwrap_or

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

terminates

ghost

ensures

self == None ==> result == default

ensures

self == None || (self == Some(result) && resolve(default))