3 files changed, 30 insertions, 3 deletions
diff --git a/src/main.rs b/src/main.rs
index 3b23d8e..2dab78d 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,12 +1,13 @@
 mod lex;
+mod parse;
 
 use lex::lexer::Lexer;
 
+use crate::parse::parse;
+
 fn main() {
     let source = "1 + 2";
     let lexer = Lexer::new(source);
 
-    for token in lexer {
-        println!("{:?}", token);
-    }
+    println!("{:?}", parse(lexer.peekable()));
 }
diff --git a/src/parse/ast.rs b/src/parse/ast.rs
new file mode 100644
index 0000000..2f30eaf
--- /dev/null
+++ b/src/parse/ast.rs
@@ -0,0 +1,16 @@
+use crate::lex::token::Token;
+
+#[derive(Debug)]
+pub enum Expression {
+    Binary {
+        left: Box<Expression>,
+        op: Token,
+        right: Box<Expression>,
+    },
+    Unary {
+        op: Token,
+        right: Box<Expression>,
+    },
+    Group(Box<Expression>),
+    Literal(Token),
+}
diff --git a/src/parse/mod.rs b/src/parse/mod.rs
new file mode 100644
index 0000000..2938131
--- /dev/null
+++ b/src/parse/mod.rs
@@ -0,0 +1,10 @@
+pub mod ast;
+
+use crate::parse::ast::Expression;
+use std::iter::Peekable;
+
+use crate::lex::token::Token;
+
+pub fn parse(tokens: Peekable<impl Iterator<Item = Token>>) -> Expression {
+    todo!()
+}