Merge pull request #107 from asuessenbach/FixOptional

Added nullptr_t-constructor to ArrayProxy, simplifying handling of empty arrays.

VkCppGenerator.cpp

@@ -238,6 +238,11 @@ std::string const arrayProxyHeader = (
   "  class ArrayProxy\n"
   "  {\n"
   "  public:\n"
+  "    ArrayProxy(std::nullptr_t)\n"
+  "      : m_count(0)\n"
+  "      , m_ptr(nullptr)\n"
+  "    {}\n"
+  "\n"
   "    ArrayProxy(T & ptr)\n"
   "      : m_count(1)\n"
   "      , m_ptr(&ptr)\n"

vulkan/vk_cpp.hpp

@@ -220,6 +220,11 @@ namespace vk
   class ArrayProxy
   {
   public:
+    ArrayProxy(std::nullptr_t)
+      : m_count(0)
+      , m_ptr(nullptr)
+    {}
+
     ArrayProxy(T & ptr)
       : m_count(1)
       , m_ptr(&ptr)