More stuffs

1 files changed, 55 insertions, 0 deletions

diff --git a/src/ast/mod.rs b/src/ast/mod.rs
new file mode 100644
index 0000000..73e73b3
--- /dev/null
+++ b/src/ast/mod.rs
@@ -0,0 +1,55 @@
+#![allow(dead_code)]
+
+pub mod display;
+
+use crate::lexer::Token;
+
+#[derive(Clone)]
+pub enum Statement<'a> {
+    Val {
+        identifier: &'a Token<'a>,
+        initializer: &'a Expression<'a>,
+    },
+    Var {
+        identifier: &'a Token<'a>,
+        initializer: &'a Expression<'a>,
+    },
+    Expression {
+        expr: &'a Expression<'a>,
+    },
+}
+
+#[derive(Clone)]
+pub enum Expression<'a> {
+    // Basic
+    Literal(Value),
+    Unary {
+        operation: Operation,
+        expr: &'a Expression<'a>,
+    },
+    Binary {
+        operation: Operation,
+        lhs: &'a Expression<'a>,
+        rhs: &'a Expression<'a>,
+    },
+    // Grouping
+}
+
+#[derive(Clone)]
+pub enum Operation {
+    Add,
+    Subtract,
+}
+
+#[derive(Clone)]
+pub struct Value(pub i32);
+
+#[test]
+fn test() {
+    let right = Expression::Literal(Value(7));
+    let _ = Expression::Binary {
+        operation: Operation::Add,
+        lhs: &Expression::Literal(Value(5)),
+        rhs: &right,
+    };
+}