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"expect" is like the word "assert". You express which invariant should always be true and therefore there should be no failure. The use of `.expect("Could not r
by vaylian 5y ago
"expect" is like the word "assert". You express which invariant should always be true and therefore there should be no failure. The use of `.expect("Could not read file")` is actually wrong, because it can fail.
- hvdijk 5y agoThat is not how Rust documents expect() should be used. Rust's own documentation (https://doc.rust-lang.org/std/result/ https://doc.rust-lang.org/std/result/) contains: let mut file = File::create("valuable_data.txt").unwrap(); file.write_all(b"important message").expect("failed to write message"); The use of .expect("Could not read file") is consistent with Rust's documentation. And I agree with OP that .expect() is poorly named. I wouldn't raise it as an issue on the work of others who just use Rust and are stuck with it though.