From 1ba3ceaf3fc24cd0833f77d58330f8a97cc57ed1 Mon Sep 17 00:00:00 2001
From: Markus Tavenrath <mtavenrath@users.noreply.github.com>
Date: Fri, 14 Oct 2016 16:22:14 +0200
Subject: [PATCH] Add support for std::tie on ResultValues. This allows
 developers to write (#39)

vk::Result result;
vk::Image image;
std::tie(result, image) = device.createImage(...);

when using the non-exception mode.
---
 VulkanHppGenerator.cpp | 3 +++
 vulkan/vulkan.hpp      | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/VulkanHppGenerator.cpp b/VulkanHppGenerator.cpp
index 95d7f47..2652ebc 100644
--- a/VulkanHppGenerator.cpp
+++ b/VulkanHppGenerator.cpp
@@ -319,6 +319,8 @@ std::string const resultValueHeader = (
   "\n"
   "    Result  result;\n"
   "    T       value;\n"
+  "\n"
+  "    operator std::tuple<Result&, T&>() { return std::tuple<Result&, T&>(result, value); }\n"
   "  };\n"
   "\n"
   "  template <typename T>\n"
@@ -3106,6 +3108,7 @@ int main( int argc, char **argv )
       << "#include <initializer_list>" << std::endl
       << "#include <string>" << std::endl
       << "#include <system_error>" << std::endl
+      << "#include <tuple>" << std::endl
       << "#include <type_traits>" << std::endl
       << "#include <vulkan/vulkan.h>" << std::endl
       << "#ifndef VULKAN_HPP_DISABLE_ENHANCED_MODE" << std::endl
diff --git a/vulkan/vulkan.hpp b/vulkan/vulkan.hpp
index 49f0b4c..e7ea1a7 100644
--- a/vulkan/vulkan.hpp
+++ b/vulkan/vulkan.hpp
@@ -33,6 +33,7 @@
 #include <initializer_list>
 #include <string>
 #include <system_error>
+#include <tuple>
 #include <type_traits>
 #include <vulkan/vulkan.h>
 #ifndef VULKAN_HPP_DISABLE_ENHANCED_MODE
@@ -399,6 +400,8 @@ namespace vk
 
     Result  result;
     T       value;
+
+    operator std::tuple<Result&, T&>() { return std::tuple<Result&, T&>(result, value); }
   };
 
   template <typename T>