From 86edc08a39931bf99cce6d86f6d2058383ecb51c Mon Sep 17 00:00:00 2001
From: Erik Demaine <edemaine@mit.edu>
Date: Fri, 1 Nov 2024 15:10:52 -0400
Subject: [PATCH] Robust parsing of `foo.` with error node

---
 source/parser.hera | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/source/parser.hera b/source/parser.hera
index 25932f79..9bfdbd92 100644
--- a/source/parser.hera
+++ b/source/parser.hera
@@ -1681,6 +1681,18 @@ PropertyAccess
       children: [ dot, ...comments, ...id.children ],
     }
 
+  # NOTE: For LSP completion / robustness, parse `foo.` but with an error node
+  ExplicitAccessStart:dot &EOS ->
+    return {
+      type: "PropertyAccess",
+      name: "",
+      dot,
+      children: [ dot, {
+        type: "Error",
+        message: "Missing property name after '.'",
+      }]
+    }
+
   ImplicitAccessStart:dot ( PrivateIdentifier / LengthShorthand ):id ->
     return {
       type: "PropertyAccess",