diff --git a/schala-lang/language/src/ast.rs b/schala-lang/language/src/ast.rs
index c6d11aa..918ca72 100644
--- a/schala-lang/language/src/ast.rs
+++ b/schala-lang/language/src/ast.rs
@@ -2,6 +2,7 @@ use std::rc::Rc;
 
 use crate::derivative::Derivative;
 
+mod visitor;
 mod operators;
 pub use operators::*;
 
diff --git a/schala-lang/language/src/ast/visitor.rs b/schala-lang/language/src/ast/visitor.rs
new file mode 100644
index 0000000..0fdd0a8
--- /dev/null
+++ b/schala-lang/language/src/ast/visitor.rs
@@ -0,0 +1,33 @@
+use std::error::Error;
+use crate::ast::*;
+
+
+pub trait ASTVisitor {
+  fn visit(&mut self, ast: &mut AST) {
+    self.block(&ast.statements);
+  }
+
+  fn block(&mut self, statements: &Vec<Statement>) {
+    for statement in statements {
+      self.statement(statement);
+    }
+  }
+
+  fn statement(&mut self, statement: &Statement) {
+    use StatementKind::*;
+    match statement.kind {
+      Expression(ref expr) => self.expression(expr),
+      Declaration(ref decl) => self.declaration(decl),
+      Import(ref import_spec) => self.import(import_spec),
+    }
+  }
+
+  fn expression(&mut self, expression: &Expression) {
+  }
+
+  fn declaration(&mut self, declaration: &Declaration) {
+  }
+
+  fn import(&mut self, import: &ImportSpecifier) {
+  }
+}