From e25fee71a2c3ff1fe7fc6049e3824017d66ba240 Mon Sep 17 00:00:00 2001
From: "Ralf W. Grosse-Kunstleve" <rwgk@yahoo.com>
Date: Mon, 22 Jul 2002 23:43:00 +0000
Subject: [PATCH] additional compile-time check:
 must_be_derived_from_pickle_suite

[SVN r14568]
---
 include/boost/python/class.hpp                 | 1 +
 include/boost/python/object/pickle_support.hpp | 3 +++
 2 files changed, 4 insertions(+)

diff --git a/include/boost/python/class.hpp b/include/boost/python/class.hpp
index 8491ba9c..1abf41cb 100644
--- a/include/boost/python/class.hpp
+++ b/include/boost/python/class.hpp
@@ -200,6 +200,7 @@ class class_ : public objects::class_base
     template <typename PickleSuiteType>
     self& def_pickle(PickleSuiteType)
     {
+      error_messages::must_be_derived_from_pickle_suite(PickleSuiteType());
       detail::pickle_suite_finalize<PickleSuiteType>::register_(
         *this,
         &PickleSuiteType::getinitargs,
diff --git a/include/boost/python/object/pickle_support.hpp b/include/boost/python/object/pickle_support.hpp
index 6b68c47a..44e2103e 100644
--- a/include/boost/python/object/pickle_support.hpp
+++ b/include/boost/python/object/pickle_support.hpp
@@ -13,11 +13,14 @@ namespace boost { namespace python {
 
 handle<> make_instance_reduce_function();
 
+struct pickle_suite;
+
 namespace error_messages {
 
   template <class T>
   struct missing_pickle_suite_function_or_incorrect_signature {};
 
+  inline void must_be_derived_from_pickle_suite(pickle_suite const&) {}
 }
 
 namespace detail { struct pickle_suite_registration; }