https://sankethbk.github.io/blog/tags/error-handling/Recent content in Error Handling on Sanketh's BlogHugo -- 0.160.1en-usSun, 29 Mar 2026 00:00:00 +0000https://sankethbk.github.io/blog/posts/rust/2026-03-29-rust-module-6-error-handling/Sun, 29 Mar 2026 00:00:00 +0000https://sankethbk.github.io/blog/posts/rust/2026-03-29-rust-module-6-error-handling/<h1 id="rust-notes--module-6-error-handling">Rust Notes — Module 6: Error Handling</h1> <hr> <h2 id="1-the-philosophy">1. The Philosophy</h2> <table> <thead> <tr> <th>Language</th> <th>Error Mechanism</th> <th>Problem</th> </tr> </thead> <tbody> <tr> <td>C</td> <td>Return codes (<code>-1</code>, <code>NULL</code>, <code>errno</code>)</td> <td>Easy to ignore, no enforcement</td> </tr> <tr> <td>Go</td> <td><code>(value, error)</code> tuples</td> <td>Better, but still ignorable</td> </tr> <tr> <td><strong>Rust</strong></td> <td><code>Result&lt;T, E&gt;</code> in the type system</td> <td><strong>Impossible to ignore — compiler enforced</strong></td> </tr> </tbody> </table> <p>If a function can fail, its return type says so. You cannot use the success value without handling the error case first. No hidden exceptions, no surprise crashes from ignored error codes.</p>