From 274eee4cc60a0ad590271874b9a80f7df94e9ca9 Mon Sep 17 00:00:00 2001
From: Sainan <sainan@calamity.gg>
Date: Thu, 24 Aug 2023 19:01:22 +0200
Subject: [PATCH] Raise a warning if non-nilable argument is not provided by
 caller

---
 src/lparser.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/lparser.h b/src/lparser.h
index 78b81c60b8..adfad1c126 100644
--- a/src/lparser.h
+++ b/src/lparser.h
@@ -233,6 +233,9 @@ struct TypeHint {
   }
 
   [[nodiscard]] bool isCompatibleWith(const TypeHint& b) const noexcept {
+    if (b.empty()) {
+      return isNullable();
+    }
     for (const auto& desc : b.descs) {
       if (!isCompatibleWith(desc)) {
         return false;
@@ -265,6 +268,9 @@ struct TypeHint {
   }
 
   [[nodiscard]] std::string toString() const {
+    if (empty()) {
+      return "nil";
+    }
     std::string str{};
     if (isNullable())
       str.push_back('?');