Create natvis definition for offset_ptr, and implement the Unordered …

…customization point intrinsic functions

CMakeLists.txt

@@ -27,6 +27,15 @@ target_link_libraries(boost_interprocess
     Boost::winapi
 )
 
+if(CMAKE_VERSION VERSION_GREATER 3.18 AND CMAKE_GENERATOR MATCHES "Visual Studio")
+
+  file(GLOB_RECURSE boost_interprocess_IDEFILES CONFIGURE_DEPENDS include/*.hpp)
+  source_group(TREE ${PROJECT_SOURCE_DIR}/include FILES ${boost_interprocess_IDEFILES} PREFIX "Header Files")
+  list(APPEND boost_interprocess_IDEFILES extra/boost_interprocess.natvis)
+  target_sources(boost_interprocess PRIVATE ${boost_interprocess_IDEFILES})
+
+endif()
+
 if (CMAKE_SYSTEM_NAME STREQUAL "Linux")
     target_link_libraries(boost_interprocess INTERFACE rt)
 elseif (CMAKE_SYSTEM_NAME STREQUAL "Windows")

extra/boost_interprocess.natvis

@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+Copyright 2024 Braden Ganetsky.
+Distributed under the Boost Software License, Version 1.0. (See accompanying
+file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+-->
+
+<AutoVisualizer xmlns="http://schemas.microsoft.com/vstudio/debugger/natvis/2010">
+
+    <Type Name="boost::interprocess::offset_ptr&lt;*&gt;" Inheritable="false">
+        <!-- This is a simplified and inlined version of `offset_ptr::get()` -->
+        <Intrinsic Name="get" Expression="(internal.m_offset == 1) ? (pointer)nullptr : (pointer)((unsigned char*)this + internal.m_offset)" />
+        <Intrinsic Name="boost_to_address" ReturnType="pointer" Expression="get()" />
+
+        <!-- This is a simplified and inlined version of `offset_ptr::operator+=()` -->
+        <Intrinsic Name="boost_next" ReturnType="pointer" Expression="reinterpret_cast&lt;pointer&gt;( reinterpret_cast&lt;unsigned char*&gt;(ptr) + static_cast&lt;offset_type&gt;(offset * (difference_type)sizeof(element_type)) )">
+            <Parameter Name="ptr" Type="pointer" />
+            <Parameter Name="offset" Type="difference_type" />
+        </Intrinsic>
+
+        <DisplayString>{get()}</DisplayString>
+        <Expand>
+            <ExpandedItem>get()</ExpandedItem>
+        </Expand>
+    </Type>
+
+</AutoVisualizer>