boost/boost-1.60-python-regptr.patch

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From f2c465ffa508459216f7093bf95ba001ad994206 Mon Sep 17 00:00:00 2001
From: vslashg <veloso@verylowsodium.com>
Date: Mon, 29 Feb 2016 13:33:35 -0500
Subject: [PATCH] Fix auto-pointer registration in Boost Python 1.60.
The conditional instantiation magic of maybe_register_pointer_to_python() assumes that use_value_holder and use_back_reference will be one of the boost::mpl::bool_ types, but this assumption is no longer true in Boost 1.60, where they can be standard library bool wrappers instead.
Explicitly defining these types as mpl::bool_ classes fixes https://github.com/boostorg/python/issues/56.
---
include/boost/python/object/class_metadata.hpp | 12 +++++++-----
1 file changed, 7 insertions(+), 5 deletions(-)
diff --git a/include/boost/python/object/class_metadata.hpp b/include/boost/python/object/class_metadata.hpp
index c71cf67..5009c17 100644
--- a/include/boost/python/object/class_metadata.hpp
+++ b/include/boost/python/object/class_metadata.hpp
@@ -164,7 +164,7 @@ struct class_metadata
>::type held_type;
// Determine if the object will be held by value
- typedef is_convertible<held_type*,T*> use_value_holder;
+ typedef mpl::bool_<is_convertible<held_type*,T*>::value> use_value_holder;
// Compute the "wrapped type", that is, if held_type is a smart
// pointer, we're talking about the pointee.
@@ -175,10 +175,12 @@ struct class_metadata
>::type wrapped;
// Determine whether to use a "back-reference holder"
- typedef mpl::or_<
- has_back_reference<T>
- , is_same<held_type_arg,T>
- , is_base_and_derived<T,wrapped>
+ typedef mpl::bool_<
+ mpl::or_<
+ has_back_reference<T>
+ , is_same<held_type_arg,T>
+ , is_base_and_derived<T,wrapped>
+ >::value
> use_back_reference;
// Select the holder.