3 ms·
There is no contradiction between “constructors cannot fail” and “fail early”, nobody is arguing the constructor should do fallible things and then hide the fai
by jakewins 1y ago
There is no contradiction between “constructors cannot fail” and “fail early”, nobody is arguing the constructor should do fallible things and then hide the failure.
What you should do is the fallible operation outside the constructor, before you call __init__, then ask for the opened file, socket, lock, what-have-you as an argument to the constructor.
Fallible initialisation operations belong in factory functions.
- int_19h 1y agoThe real problem is that constructors and factory functions are distinct in the first place. They aren't, in Rust, and it's much easier to reason about and requires far less verbiage to write.
- throw-the-towel 1y agoWhy though?