feat: impl std::ops::BitOr for SigSet

Author: JonathanWoollett-Light

CHANGELOG.md

@@ -13,6 +13,8 @@ This project adheres to [Semantic Versioning](https://semver.org/).
 
 - Added `impl From<Signal> for SigSet`.
   ([#1959](https://github.com/nix-rust/nix/pull/1959))
+- Added `impl std::ops::BitOr for SigSet`.
+  ([#1959](https://github.com/nix-rust/nix/pull/1959))
 
 ### Changed
 

src/sys/signal.rs

@@ -612,6 +612,14 @@ impl From<Signal> for SigSet {
     }
 }
 
+impl std::ops::BitOr for SigSet {
+    type Output = Self;
+
+    fn bitor(self, rhs: Self) -> Self::Output {
+        self.iter().chain(rhs.iter()).collect()
+    }
+}
+
 impl AsRef<libc::sigset_t> for SigSet {
     fn as_ref(&self) -> &libc::sigset_t {
         &self.sigset