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Sorry, I'm trying very hard to learn Rust, and I'm willing to accept a lot of its restrictions, but this didn't clear anything up. Why does every library imple

• Rusky 9y ago
  You can definitely reuse other library's error types. I often do that while prototyping. The benefit of lib-specific error types, though, is that they can be far more specific.
• burntsushi 9y ago
  As an example of the kind of specificity you might want, take a look at the error type for parsing a regular expression: https://docs.rs/regex-syntax/0.4.0/regex_syntax/enum.ErrorKind.html https://docs.rs/regex-syntax/0.4.0/regex_syntax/enum.ErrorKi... Now, in most cases, callers don't care at all about which specific error happened. They just want to print the error and be done with it. And that works just fine, because of the error handling machinery. But if you do want to drill down, then the option is there for you.
• leshow 9y ago
  You can use pre defined error types. Have you seen https://doc.rust-lang.org/std/io/enum.ErrorKind.html https://doc.rust-lang.org/std/io/enum.ErrorKind.html ?
  • rspeer 9y ago
    That seems to just be kinds of IO errors, though.