get_fail_matcher implemented.

src/parser/new_context.rs

@@ -27,9 +27,9 @@ pub trait NodeType<'p> {
 
 impl<'p, T> NodeType<'p> for Node<'p, T>
 where
-    T: ContextElement,
+    T: for<'s> ContextElement<'s>,
 {
-    fn get_data(&self) -> &dyn ContextElement {
+    fn get_data<'s>(&'s self) -> &dyn ContextElement {
         &self.data
     }
 
@@ -38,7 +38,9 @@ where
     }
 }
 
-pub trait ContextElement {}
+pub trait ContextElement<'r> {
+    fn get_fail_matcher(&self) -> ChainBehavior<'r>;
+}
 
 struct FailMatcherNode<'r> {
     fail_matcher: ChainBehavior<'r>,
@@ -48,7 +50,21 @@ struct PreviousElementNode<'r> {
     dummy: &'r str,
 }
 
-enum ChainBehavior<'r> {
+#[derive(Clone)]
+pub enum ChainBehavior<'r> {
     AndParent(Option<&'r Matcher>),
     IgnoreParent(Option<&'r Matcher>),
 }
+
+impl<'r> ContextElement<'r> for FailMatcherNode<'r> {
+    fn get_fail_matcher(&self) -> ChainBehavior<'r> {
+        // TODO: Remove this clone
+        self.fail_matcher.clone()
+    }
+}
+
+impl<'r> ContextElement<'r> for PreviousElementNode<'r> {
+    fn get_fail_matcher(&self) -> ChainBehavior<'r> {
+        ChainBehavior::AndParent(None)
+    }
+}