diff --git a/src/ast.rs b/src/ast.rs
index 9f71b31..51e8b18 100644
--- a/src/ast.rs
+++ b/src/ast.rs
@@ -1,11 +1,5 @@
 use crate::tokens::Token;
 
-/// This trait should be implemented by nodes to allow AST dumps.
-pub trait AstDumper {
-    /// Dump the node as a string.
-    fn dump(&self) -> String;
-}
-
 /// An AST node that represents an expression.
 #[derive(Debug, Clone)]
 pub enum ExprNode {
@@ -29,6 +23,16 @@ pub enum ExprNode {
     Litteral { value: Token },
 }
 
+/* -------------------------------- *
+ * Dumper trait and implementations *
+ * -------------------------------- */
+
+/// This trait should be implemented by nodes to allow AST dumps.
+pub trait AstDumper {
+    /// Dump the node as a string.
+    fn dump(&self) -> String;
+}
+
 impl AstDumper for ExprNode {
     fn dump(&self) -> String {
         match self {