Implement Default for FdSet

CHANGELOG.md

@@ -6,6 +6,9 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 ## [Unreleased] - ReleaseDate
 ### Added
 
+- Implemented `Default` for `FdSet`
+  ([#1107](https://github.com/nix-rust/nix/pull/1107))
+
 - Added `NixPath::is_empty`.
   ([#1107](https://github.com/nix-rust/nix/pull/1107))
 

src/sys/select.rs

@@ -69,6 +69,12 @@ impl FdSet {
     }
 }
 
+impl Default for FdSet {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
 /// Monitors file descriptors for readiness
 ///
 /// Returns the total number of ready file descriptors in all sets. The sets are changed so that all

src/sys/socket/mod.rs

@@ -344,6 +344,8 @@ impl<T> CmsgSpace<T> {
     /// Create a CmsgSpace<T>. The structure is used only for space, so
     /// the fields are uninitialized.
     #[deprecated( since="0.14.0", note="Use the cmsg_space! macro instead")]
+    // It's deprecated anyway; no sense adding Default
+    #[allow(clippy::new_without_default)]
     pub fn new() -> Self {
         // Safe because the fields themselves aren't accessible.
         unsafe { mem::uninitialized() }