Improve handling of disabled extensions.

(Partly) resolves #531

VulkanHppGenerator.hpp

@@ -92,8 +92,9 @@ class VulkanHppGenerator
 
     struct ParamData
     {
-      ParamData()
+      ParamData(int line)
         : optional(false)
+        , xmlLine(line)
       {}
 
       TypeData                  type;
@@ -101,6 +102,7 @@ class VulkanHppGenerator
       std::vector<std::string>  arraySizes;
       std::string               len;
       bool                      optional;
+      int                       xmlLine;
     };
 
     struct CommandData
@@ -217,6 +219,20 @@ class VulkanHppGenerator
       int                       xmlLine;
     };
 
+    enum class TypeCategory
+    {
+      Bitmask,
+      BaseType,
+      Define,
+      Enum,
+      FuncPointer,
+      Handle,
+      Requires,
+      Struct,
+      Union,
+      Unknown
+    };
+
   private:
     void appendArgumentPlainType(std::string & str, ParamData const& paramData) const;
     void appendArguments(std::string & str, CommandData const& commandData, size_t returnParamIndex, size_t templateParamIndex, std::map<size_t, size_t> const& vectorParamIndices, bool twoStep, bool firstCall, bool singular, size_t from, size_t to) const;
@@ -331,6 +347,7 @@ class VulkanHppGenerator
     void readTypes(tinyxml2::XMLElement const* element);
     void registerDeleter(std::string const& name, std::pair<std::string, CommandData> const& commandData);
     void setVulkanLicenseHeader(int line, std::string const& comment);
+    std::string toString(TypeCategory category);
 
   private:
     std::map<std::string, BaseTypeData>     m_baseTypes;
@@ -349,7 +366,7 @@ class VulkanHppGenerator
     std::map<std::string, std::string>      m_structureAliases;
     std::map<std::string, StructureData>    m_structures;
     std::set<std::string>                   m_tags;
-    std::set<std::string>                   m_types;
+    std::map<std::string, TypeCategory>     m_types;
     std::string                             m_typesafeCheck;
     std::string                             m_version;
     std::string                             m_vulkanLicenseHeader;