feat: extend api with iterator for routes (#41)

* feat: extend api with iterator for routes

Forward iterator access to the routes to allow collecting
them as a client. This allows eg. collecting the routes
to subscribe them when using the router in an MQTT usecase.

Signed-off-by: Marc Bodmer <marc.bodmer@securiton.ch>

* feat: also add into_iter()

clippy requests an implementation of into_iter()
when implementing iter()

Signed-off-by: Marc Bodmer <marc.bodmer@securiton.ch>

* feat: implement IntoIterator trait instead of forwarding from vec

Signed-off-by: Marc Bodmer <marc.bodmer@securiton.ch>

* fix: implement IntoIterator for &PathTree<T>

Signed-off-by: Marc Bodmer <marc.bodmer@securiton.ch>

---------

Signed-off-by: Marc Bodmer <marc.bodmer@securiton.ch>

src/lib.rs

@@ -142,7 +142,7 @@ use alloc::{
     string::{String, ToString},
     vec::Vec,
 };
-use core::str::from_utf8;
+use core::{slice::Iter, str::from_utf8};
 use smallvec::SmallVec;
 
 mod node;
@@ -258,6 +258,19 @@ impl<T> PathTree<T> {
             from_utf8(&bytes).map(ToString::to_string).ok()
         })
     }
+
+    pub fn iter(&self) -> Iter<'_, (T, Vec<Piece>)> {
+        self.routes.iter()
+    }
+}
+
+impl<'a, T> IntoIterator for &'a PathTree<T> {
+    type Item = &'a (T, Vec<Piece>);
+    type IntoIter = Iter<'a, (T, Vec<Piece>)>;
+
+    fn into_iter(self) -> Self::IntoIter {
+        self.iter()
+    }
 }
 
 /// Matched route path infomation.