Created
October 1, 2018 21:14
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| trait PrintError<E> { | |
| fn print_err(self, message: &'static str) -> Self; | |
| // The String type is allocated in the heap, so when a String is needed it's better to have a function that only allocates it in case it's necessary | |
| fn print_err_with<F>(self, message_f: F) -> Self | |
| where F: Fn(&E) -> String; | |
| } | |
| impl<T, E> PrintError<E> for Result<T, E> { | |
| fn print_err(self, message: &'static str) -> Result<T, E> { | |
| self.map_err(|err| { | |
| println!("{}", message); | |
| err | |
| }) | |
| } | |
| fn print_err_with<F>(self, message_f: F) -> Result<T, E> | |
| where F: Fn(&E) -> String { | |
| self.map_err(|err| { | |
| println!("{}", message_f(&err)); | |
| err | |
| }) | |
| } | |
| } |
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