implement PartialEq<str> for string new types

dbus/src/strings.rs

@@ -165,6 +165,22 @@ impl<'m> hash::Hash for $t<'m> {
     }
 }
 
+impl PartialEq<str> for $t<'_> {
+    fn eq(&self, other: &str) -> bool {
+        self.0 == other || 
+        // ignores the trailing \0
+            &self.0[..self.0.len()-1] == other
+    }
+}
+
+impl PartialEq<&'_ str> for $t<'_> {
+    fn eq(&self, other: &&str) -> bool {
+        self.0 == *other || 
+        // ignores the trailing \0
+            &self.0[..self.0.len()-1] == *other
+    }
+}
+
 }}
 
 /// A wrapper around a string that is guaranteed to be
@@ -248,3 +264,11 @@ fn reborrow_path() {
 fn make_sig() {
     assert_eq!(&*Signature::make::<(&str, u8)>(), "(sy)");
 }
+
+#[test]
+fn partial_eq_str() {
+    assert_eq!(Signature::new("s").unwrap(), "s");
+    assert_eq!(Signature::new("h").unwrap(), "h\0");
+    assert_eq!(Path::new("/hello").unwrap(), "/hello");
+    assert_eq!(Path::new("/world").unwrap(), "/world\0");
+}