Implement Eq for Regex

regex_macros/tests/tests.rs

@@ -10,6 +10,11 @@
 
 use regex::{Regex, NoExpand};
 
+#[test]
+fn eq() {
+    assert_eq!(regex!(r"[a-z]+"), Regex::new("[a-z]+").unwrap());
+}
+
 #[test]
 fn splitn() {
     let re = regex!(r"\d+");

src/re.rs

@@ -159,6 +159,17 @@ impl fmt::Debug for Regex {
     }
 }
 
+/// Equality comparison is based on the original string. It is possible that different regular
+/// expressions have the same matching behavior, but are still compared unequal.  For example,
+/// `\d+` and `\d\d*` match the same set of strings, but are not considered equal.
+impl PartialEq for Regex {
+    fn eq(&self, other: &Regex) -> bool {
+        self.as_str() == other.as_str()
+    }
+}
+
+impl Eq for Regex {}
+
 impl FromStr for Regex {
     type Err = parse::Error;