From 70a8be8e4c50ca4ca15dfd1dc22c0e9414d1aec2 Mon Sep 17 00:00:00 2001
From: ValKmjolnir <lhk101lhk101@qq.com>
Date: Sat, 5 Aug 2023 00:08:28 +0800
Subject: [PATCH] :sparkles: symbol begins with '_' will not be exported

---
 src/nasal_import.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/nasal_import.cpp b/src/nasal_import.cpp
index 945d30d..31b862b 100644
--- a/src/nasal_import.cpp
+++ b/src/nasal_import.cpp
@@ -279,6 +279,10 @@ return_expr* linker::generate_module_return(code_block* block) {
     res->set_value(value);
     for(const auto& i : sf->do_find(block)) {
         auto pair = new hash_pair(block->get_location());
+        // do not export symbol begins with '_'
+        if (i.name.length() && i.name[0]=='_') {
+            continue;
+        }
         pair->set_name(i.name);
         pair->set_value(new identifier(block->get_location(), i.name));
         value->add_member(pair);