From e0a35b011aed512c1975c9717c08a68de97dc84a Mon Sep 17 00:00:00 2001
From: "Maarten P. Scholl" <scholl.maarten@gmail.com>
Date: Sun, 24 Oct 2021 15:16:20 +0200
Subject: [PATCH] make sure to only instantiate boost python classes when
 Python is turned on

---
 esl/simulation/identity.hpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/esl/simulation/identity.hpp b/esl/simulation/identity.hpp
index dadbaab..0161a6d 100644
--- a/esl/simulation/identity.hpp
+++ b/esl/simulation/identity.hpp
@@ -360,9 +360,9 @@ namespace esl {
         {
             static_assert(
                 std::is_base_of<base_type_, identifiable_type_>::value
-//#ifdef WITH_PYTON
+#ifdef WITH_PYTON
                     || std::is_base_of<boost::python::object, identifiable_type_>::value
-//#endif
+#endif
                 ,
                 "can not cast identifier, please verify that this "
                 "conversion is allowed");