[C++] Associate global variables with Symbols directly

1 files changed, 4 insertions, 0 deletions

diff --git a/var.cc b/var.cc
index a5cde3e..73f542c 100644
--- a/var.cc
+++ b/var.cc
@@ -112,6 +112,10 @@ Vars::~Vars() {
   }
 }
 
+void Vars::add_used_env_vars(Symbol v) {
+  used_env_vars_.insert(v);
+}
+
 Var* Vars::Lookup(Symbol name) const {
   auto found = find(name);
   if (found == end())