From e2c43dc911a71676cab57c65d2a683d36287e674 Mon Sep 17 00:00:00 2001
From: Alek Ratzloff <alekratz@gmail.com>
Date: Thu, 3 Sep 2020 18:58:22 -0700
Subject: [PATCH] Add LhsExpr parsing

Signed-off-by: Alek Ratzloff <alekratz@gmail.com>
---
 src/syn/parser.y | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/src/syn/parser.y b/src/syn/parser.y
index a320f5f..05d2a25 100644
--- a/src/syn/parser.y
+++ b/src/syn/parser.y
@@ -19,7 +19,24 @@ Body -> Result<Vec<Stmt>>:
 
 Stmt -> Result<Stmt>:
         Expr { Ok(Stmt::Expr($1?)) }
-    //|   Assign { todo!() }
+    |   Assign { todo!() }
+    ;
+
+Assign -> Result<AssignStmt>:
+        LhsExpr '=' Expr {
+            todo!()
+        }
+    ;
+
+LhsExpr -> Result<LhsExpr>: 
+        AccessExpr {
+            let lhs = match $1? {
+                Expr::Access(access) => LhsExpr::SetAttr(*access),
+                Expr::Atom(Atom::Ident(local)) => LhsExpr::Local(local),
+                _ => todo!("TODO : invalid syntax, raise error"),
+            };
+            Ok(lhs)
+        }
     ;
 
 Expr -> Result<Expr>: BinExpr { $1 };