From: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Date: Tue, 30 Jul 2024 19:21:07 +0000 (+0000)
Subject: Fix: missing typename in URCU_FORCE_CAST
X-Git-Tag: v0.14.1~1
X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=ebd83c14476470e7b06b2720d7cc61993c135fe3;p=userspace-rcu.git

Fix: missing typename in URCU_FORCE_CAST

When using rcu_dereference() in the method of a templated class on a pointer
whose type is determined by the template arguments, the following error occurs
(using g++ 13.2.0):

  ../../src/common/urcu.hpp:387:39: error: need 'typename' before 'std::remove_cv<__typeof__ (((lttng::urcu::rcu_list_iteration_adapter<ContainedType, Member>::iterator*)this)->_node_contents.next)>::type' because 'std::remove_cv<__typeof__ (((lttng::urcu::rcu_list_iteration_adapter<ContainedType, Member>::iterator*)this)->_node_contents.next)>' is a dependent scope

`typename` is necessary here since the result of the template argument provided
to std::remove_cv can be a dependant type and we are required to inform the
compiler of this dependency.

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: I209fc5f46fee372bf673fc04c5a55d4827238b19
---

diff --git a/include/urcu/compiler.h b/include/urcu/compiler.h
index 0de713a..bd35e82 100644
--- a/include/urcu/compiler.h
+++ b/include/urcu/compiler.h
@@ -103,7 +103,7 @@
 #define __rcu
 
 #ifdef __cplusplus
-#define URCU_FORCE_CAST(_type, arg)	(reinterpret_cast<std::remove_cv<_type>::type>(arg))
+#define URCU_FORCE_CAST(_type, arg)	(reinterpret_cast<typename std::remove_cv<_type>::type>(arg))
 #else
 #define URCU_FORCE_CAST(type, arg)	((type) (arg))
 #endif