1 files changed, 15 insertions, 0 deletions
diff --git a/src/ast/mod.rs b/src/ast/mod.rs
new file mode 100644
index 0000000..1fa7d23
--- /dev/null
+++ b/src/ast/mod.rs
@@ -0,0 +1,15 @@
+pub mod convert;
+
+type Ident = String;
+
+#[derive(Clone, Debug, Eq, PartialEq)]
+pub enum Term {
+    Epsilon,
+    Bottom,
+    Literal(String),
+    Cat(Box<Term>, Box<Term>),
+    Alt(Box<Term>, Box<Term>),
+    Fix(Box<Term>), // Uses de Bruijn indices
+    Variable(usize),
+    Call(Ident, Vec<Term>),
+}