Add cast operator to reference of UniqueHandle of ResultValue<UniqueHandle>.

Vulkan-Headers

@@ -1 +1 @@
-Subproject commit 9d2dfca53b754dd3ab916899fed567a5290c30aa
+Subproject commit f31524575668c6c483356bd54ca974590e31be8e

VulkanHppGenerator.cpp

@@ -7955,15 +7955,6 @@ namespace std
   template <typename Type, typename Dispatch>
   struct ResultValue<UniqueHandle<Type,Dispatch>>
   {
-#ifdef VULKAN_HPP_HAS_NOEXCEPT
-    ResultValue(Result r, UniqueHandle<Type, Dispatch> & v) VULKAN_HPP_NOEXCEPT
-#else
-    ResultValue(Result r, UniqueHandle<Type, Dispatch>& v)
-#endif
-      : result(r)
-      , value(v)
-    {}
-
 #ifdef VULKAN_HPP_HAS_NOEXCEPT
     ResultValue(Result r, UniqueHandle<Type, Dispatch> && v) VULKAN_HPP_NOEXCEPT
 #else
@@ -7978,6 +7969,11 @@ namespace std
 
     operator std::tuple<Result&, UniqueHandle<Type, Dispatch>&>() VULKAN_HPP_NOEXCEPT { return std::tuple<Result&, UniqueHandle<Type, Dispatch>&>(result, value); }
 
+    operator UniqueHandle<Type, Dispatch>& () & VULKAN_HPP_NOEXCEPT
+    {
+      return value;
+    }
+
     operator UniqueHandle<Type, Dispatch>() VULKAN_HPP_NOEXCEPT
     {
       return std::move(value);

tests/ResultValue/CMakeLists.txt

@@ -26,13 +26,9 @@ set(SOURCES
 source_group(headers FILES ${HEADERS})
 source_group(sources FILES ${SOURCES})
 
-add_library(ResultValue
+add_executable(ResultValue
   ${HEADERS}
   ${SOURCES}
 )
 
-if (UNIX)
-  target_link_libraries(ResultValue "-ldl")
-endif()
-
 set_target_properties(ResultValue PROPERTIES FOLDER "Tests")

tests/ResultValue/ResultValue.cpp

@@ -21,34 +21,47 @@
 
 VULKAN_HPP_DEFAULT_DISPATCH_LOADER_DYNAMIC_STORAGE
 
-// Compile only test for issue 589.
-void test_conversion()
-{
-#if defined(VULKAN_DISABLE_IMPLICIT_RESULT_VALUE_CAST)
-  static_assert(false, "Conversions not enabled");
-#endif
+void as_value( int ) {}
+void as_ref( int & ) {}
+void as_rvref( int && ) {}
+void as_cref( const int & ) {}
+void as_crvref( const int && ) {}
 
-  void as_value(int);
-  void as_ref(int&);
-  void as_cref(const int&);
-  void as_rvref(int&&);
-  void as_crvref(const int&&);
+void as_cref( const vk::UniquePipeline & ) {}
+
+int main( int /*argc*/, char ** /*argv*/ )
+{
+#if defined( VULKAN_DISABLE_IMPLICIT_RESULT_VALUE_CAST )
+  static_assert( false, "Conversions not enabled" );
+#endif
 
   using result = vk::ResultValue<int>;
 
-  auto val        = result {vk::Result{}, 42};
-  const auto cval = result {vk::Result{}, 42}; 
+  auto       val  = result{ vk::Result{}, 42 };
+  const auto cval = result{ vk::Result{}, 42 };
 
-  as_value(val);
-  as_value(cval);
+  as_value( val );
+  as_value( cval );
 
-  as_ref(val);
-  //as_ref(cval); // should fail
-  as_cref(val);
-  as_cref(cval);
+  as_ref( val );
+  // as_ref(cval); // should fail
+  as_cref( val );
+  as_cref( cval );
 
-  as_rvref(std::move(val));
-  //as_rvref(std::move(cval)); // should fail
-  as_crvref(std::move(val));
-  as_crvref(std::move(cval));
+  as_rvref( std::move( val ) );
+  // as_rvref(std::move(cval)); // should fail
+  as_crvref( std::move( val ) );
+  as_crvref( std::move( cval ) );
+
+  vk::Pipeline       pipe( VkPipeline( 0x8 ) );  // fake a Pipeline here, to have something different from zero
+  vk::UniquePipeline pipeline( pipe );
+  vk::ResultValue<vk::UniquePipeline> rv( {}, std::move( pipeline ) );
+
+  as_cref( rv );  // does not move out handle
+  assert( rv.value );
+
+  auto p = std::move( rv.value );
+  p.release();  // release the faked Pipeline, to prevent error on trying to destroy it
+
+  return 0;
 }

vulkan/vulkan.hpp

@@ -52,7 +52,7 @@
 #  include <compare>
 #endif
 
-static_assert( VK_HEADER_VERSION == 143, "Wrong VK_HEADER_VERSION!" );
+static_assert( VK_HEADER_VERSION == 144, "Wrong VK_HEADER_VERSION!" );
 
 // 32-bit vulkan is not typesafe for handles, so don't allow copy constructors on this platform by default.
 // To enable this feature on 32-bit platforms please define VULKAN_HPP_TYPESAFE_CONVERSION
@@ -15887,15 +15887,6 @@ namespace VULKAN_HPP_NAMESPACE
   template <typename Type, typename Dispatch>
   struct ResultValue<UniqueHandle<Type, Dispatch>>
   {
-#  ifdef VULKAN_HPP_HAS_NOEXCEPT
-    ResultValue( Result r, UniqueHandle<Type, Dispatch> & v ) VULKAN_HPP_NOEXCEPT
-#  else
-    ResultValue( Result r, UniqueHandle<Type, Dispatch> & v )
-#  endif
-      : result( r )
-      , value( v )
-    {}
-
 #  ifdef VULKAN_HPP_HAS_NOEXCEPT
     ResultValue( Result r, UniqueHandle<Type, Dispatch> && v ) VULKAN_HPP_NOEXCEPT
 #  else
@@ -15913,6 +15904,11 @@ namespace VULKAN_HPP_NAMESPACE
       return std::tuple<Result &, UniqueHandle<Type, Dispatch> &>( result, value );
     }
 
+    operator UniqueHandle<Type, Dispatch> &() & VULKAN_HPP_NOEXCEPT
+    {
+      return value;
+    }
+
     operator UniqueHandle<Type, Dispatch>() VULKAN_HPP_NOEXCEPT
     {
       return std::move( value );