From 92d81c58443e7c7a1b025229227f752747015a41 Mon Sep 17 00:00:00 2001
From: Matthias Koefferlein <matthias@koefferlein.de>
Date: Sun, 13 Dec 2020 22:09:21 +0100
Subject: [PATCH] WIP: cold proxies are written to GDS2 and OASIS too. This
 means we keep the library references even if we load and save with the wrong
 libraries or technology.

---
 src/db/db/dbLayout.cc | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/db/db/dbLayout.cc b/src/db/db/dbLayout.cc
index 6ff5baecf..ad60aad38 100644
--- a/src/db/db/dbLayout.cc
+++ b/src/db/db/dbLayout.cc
@@ -2472,6 +2472,13 @@ bool
 Layout::get_context_info (cell_index_type cell_index, ProxyContextInfo &info) const
 {
   const db::Cell *cptr = &cell (cell_index);
+
+  const db::ColdProxy *cold_proxy = dynamic_cast <const db::ColdProxy *> (cptr);
+  if (cold_proxy) {
+    info = cold_proxy->context_info ();
+    return true;
+  }
+
   const db::Layout *ly = this;
 
   const db::LibraryProxy *lib_proxy;