From 73ef20c4aa3ef6699f7a7203a911eb4c4dda756a Mon Sep 17 00:00:00 2001
From: YannAhlgrim <yann@ahlgrim.net>
Date: Thu, 14 May 2026 18:49:56 +0200
Subject: [PATCH] init ast

---
 src/ast/mod.rs | 38 ++++++++++++++++++++++++++++++++++++++
 src/main.rs    |  1 +
 2 files changed, 39 insertions(+)
 create mode 100644 src/ast/mod.rs

diff --git a/src/ast/mod.rs b/src/ast/mod.rs
new file mode 100644
index 0000000..2196ca2
--- /dev/null
+++ b/src/ast/mod.rs
@@ -0,0 +1,38 @@
+trait NodeTrait {
+    fn token_literal(&self) -> String;
+}
+
+trait StatementTrait: NodeTrait {
+    fn statement_node(&self);
+}
+
+trait ExpressionTrait: NodeTrait {
+    fn expression_node(&self);
+}
+
+struct Statement {
+    //
+}
+impl NodeTrait for Statement {
+    fn token_literal(&self) -> String {
+        todo!()
+    }
+}
+
+impl StatementTrait for Statement {
+    fn statement_node(&self) {}
+}
+
+struct Program {
+    statements: Vec<Statement>,
+}
+
+impl NodeTrait for Program {
+    fn token_literal(&self) -> String {
+        if self.statements.is_empty() {
+            self.statements[0].token_literal()
+        } else {
+            String::new()
+        }
+    }
+}
diff --git a/src/main.rs b/src/main.rs
index db5320b..0e0430b 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,3 +1,4 @@
+mod ast;
 mod lexer;
 mod repl;
 mod token;