Add an example of process::Termination

Author: cuviper

posts/2022-05-19-Rust-1.61.0.md

@@ -41,6 +41,33 @@ type that wraps platform-specific return types. That has `SUCCESS` and `FAILURE`
 implements `From<u8>` for more arbitrary values. The `Termination` trait can also be implemented for
 your own types, allowing you to customize any kind of reporting before converting to an `ExitCode`.
 
+For example, here's a type-safe way to write exit codes for a `git bisect run` script:
+
+```rust
+use std::process::{ExitCode, Termination};
+
+#[repr(u8)]
+pub enum GitBisectResult {
+    Good = 0,
+    Bad = 1,
+    Skip = 125,
+    Abort = 255,
+}
+
+impl Termination for GitBisectResult {
+    fn report(self) -> ExitCode {
+        // Maybe print a message here
+        ExitCode::from(self as u8)
+    }
+}
+
+fn main() -> GitBisectResult {
+    std::panic::catch_unwind(|| {
+        todo!("test the commit")
+    }).unwrap_or(GitBisectResult::Abort)
+}
+```
+
 ### More capabilities for `const fn`
 
 Several incremental features have been stabilized in this release to enable more functionality in