Bas-Man · April 20, 2021 14:44 · Apr 20, 2021
diff --git a/spf_a_mechanism_regex.rs b/spf_a_mechanism_regex.rs
@@ -0,0 +1,15 @@
+fn main() {
+    let regex = regex::Regex::new(r"(?P<a_only>a$)|(?:a:)(?P<a_colon>[^/].+)|(?P<a_slash>a/\d{1,2})").unwrap();
+
+    [
+        "a",
+        "a:example.com",
+        "a:mailers.example.com",
+        "a/24",
+        "a:offsite.example.com/24]",
+    ]
+    .iter()
+    .copied()
+    .map(|string| regex.captures(string))
+    .for_each(|cap| println!("{:?}", cap))
+}