Add generic Node type

schala-lang/language/src/ast.rs

@@ -4,6 +4,20 @@ use std::convert::From;
 use source_map::{SourceMap};
 use builtin::{BinOp, PrefixOp};
 
+pub struct Node<T> {
+  n: T,
+  meta: Meta
+}
+
+impl<T> Node<T> {
+  fn node(&self) -> &T {
+    &self.n
+  }
+}
+
+struct Meta {
+}
+
 #[derive(Debug, PartialEq)]
 pub struct AST(pub Vec<Statement>);