Rollup merge of #56470 - llogiq:process-termination-doctest, r=GuillaumeGomez

Modify doctest's auto-`fn main()` to allow `Result`s

This lets the default `fn main()` ~~return `impl Termination`~~ unwrap Results, which allows the use of `?` in most tests without adding it manually. This fixes #56260

~~Blocked on `std::process::Termination` stabilization.~~

Using `Termination` would have been cleaner, but this should work OK.

1 files changed, 24 insertions, 0 deletions

diff --git a/src/test/rustdoc/process-termination.rs b/src/test/rustdoc/process-termination.rs
new file mode 100644
index 00000000000..32258792b6e
--- /dev/null
+++ b/src/test/rustdoc/process-termination.rs
@@ -0,0 +1,24 @@
+// compile-flags:--test
+
+/// A check of using various process termination strategies
+///
+/// # Examples
+///
+/// ```rust
+/// assert!(true); // this returns `()`, all is well
+/// ```
+///
+/// You can also simply return `Ok(())`, but you'll need to disambiguate the
+/// type using turbofish, because we cannot infer the type:
+///
+/// ```rust
+/// Ok::<(), &'static str>(())
+/// ```
+///
+/// You can err with anything that implements `Debug`:
+///
+/// ```rust,should_panic
+/// Err("This is returned from `main`, leading to panic")?;
+/// Ok::<(), &'static str>(())
+/// ```
+pub fn check_process_termination() {}