Merge pull request #280 from secondlife/dispatch-maint-v2

Major improvements to LLLeap functionality

1 files changed, 85 insertions, 3 deletions

diff --git a/indra/llcommon/llptrto.h b/indra/llcommon/llptrto.h
index 4082e30de6..9ef279fdbf 100644
--- a/indra/llcommon/llptrto.h
+++ b/indra/llcommon/llptrto.h
@@ -33,9 +33,12 @@
 
 #include "llpointer.h"
 #include "llrefcount.h"             // LLRefCount
+#include <boost/intrusive_ptr.hpp>
+#include <boost/shared_ptr.hpp>
 #include <boost/type_traits/is_base_of.hpp>
 #include <boost/type_traits/remove_pointer.hpp>
-#include <boost/utility/enable_if.hpp>
+#include <memory>                   // std::shared_ptr, std::unique_ptr
+#include <type_traits>
 
 /**
  * LLPtrTo<TARGET>::type is either of two things:
@@ -55,14 +58,14 @@ struct LLPtrTo
 
 /// specialize for subclasses of LLRefCount
 template <class T>
-struct LLPtrTo<T, typename boost::enable_if< boost::is_base_of<LLRefCount, T> >::type>
+struct LLPtrTo<T, typename std::enable_if< boost::is_base_of<LLRefCount, T>::value >::type>
 {
     typedef LLPointer<T> type;
 };
 
 /// specialize for subclasses of LLThreadSafeRefCount
 template <class T>
-struct LLPtrTo<T, typename boost::enable_if< boost::is_base_of<LLThreadSafeRefCount, T> >::type>
+struct LLPtrTo<T, typename std::enable_if< boost::is_base_of<LLThreadSafeRefCount, T>::value >::type>
 {
     typedef LLPointer<T> type;
 };
@@ -83,4 +86,83 @@ struct LLRemovePointer< LLPointer<SOMECLASS> >
     typedef SOMECLASS type;
 };
 
+namespace LL
+{
+
+/*****************************************************************************
+*   get_ref()
+*****************************************************************************/
+    template <typename T>
+    struct GetRef
+    {
+        // return const ref or non-const ref, depending on whether we can bind
+        // a non-const lvalue ref to the argument
+        const auto& operator()(const T& obj) const { return obj; }
+        auto& operator()(T& obj) const { return obj; }
+    };
+
+    template <typename T>
+    struct GetRef<const T*>
+    {
+        const auto& operator()(const T* ptr) const { return *ptr; }
+    };
+
+    template <typename T>
+    struct GetRef<T*>
+    {
+        auto& operator()(T* ptr) const { return *ptr; }
+    };
+
+    template <typename T>
+    struct GetRef< LLPointer<T> >
+    {
+        auto& operator()(LLPointer<T> ptr) const { return *ptr; }
+    };
+
+    /// whether we're passed a pointer or a reference, return a reference
+    template <typename T>
+    auto& get_ref(T& ptr_or_ref)
+    {
+        return GetRef<typename std::decay<T>::type>()(ptr_or_ref);
+    }
+
+    template <typename T>
+    const auto& get_ref(const T& ptr_or_ref)
+    {
+        return GetRef<typename std::decay<T>::type>()(ptr_or_ref);
+    }
+
+/*****************************************************************************
+*   get_ptr()
+*****************************************************************************/
+    // if T is any pointer type we recognize, return it unchanged
+    template <typename T>
+    const T* get_ptr(const T* ptr) { return ptr; }
+
+    template <typename T>
+    T* get_ptr(T* ptr) { return ptr; }
+
+    template <typename T>
+    const std::shared_ptr<T>& get_ptr(const std::shared_ptr<T>& ptr) { return ptr; }
+
+    template <typename T>
+    const std::unique_ptr<T>& get_ptr(const std::unique_ptr<T>& ptr) { return ptr; }
+
+    template <typename T>
+    const boost::shared_ptr<T>& get_ptr(const boost::shared_ptr<T>& ptr) { return ptr; }
+
+    template <typename T>
+    const boost::intrusive_ptr<T>& get_ptr(const boost::intrusive_ptr<T>& ptr) { return ptr; }
+
+    template <typename T>
+    const LLPointer<T>& get_ptr(const LLPointer<T>& ptr) { return ptr; }
+
+    // T is not any pointer type we recognize, take a pointer to the parameter
+    template <typename T>
+    const T* get_ptr(const T& obj) { return &obj; }
+
+    template <typename T>
+    T* get_ptr(T& obj) { return &obj; }
+} // namespace LL
+
 #endif /* ! defined(LL_LLPTRTO_H) */