Union Vector

include/flatbuffers/idl.h

@@ -356,10 +356,25 @@ struct IDLOptions {
   bool allow_non_utf8;
 
   // Possible options for the more general generator below.
-  enum Language { kJava, kCSharp, kGo, kMAX };
+  enum Language {
+    kJava   = 1 << 0,
+    kCSharp = 1 << 1,
+    kGo     = 1 << 2,
+    kCpp    = 1 << 3,
+    kJs     = 1 << 4,
+    kPython = 1 << 5,
+    kPhp    = 1 << 6,
+    kJson   = 1 << 7,
+    kBinary = 1 << 8,
+    kMAX
+  };
 
   Language lang;
 
+  // The corresponding language bit will be set if a language is included
+  // for code generation.
+  unsigned long lang_to_generate;
+
   IDLOptions()
     : strict_json(false),
       skip_js_exports(false),
@@ -378,7 +393,8 @@ struct IDLOptions {
       cpp_object_api_pointer_type("std::unique_ptr"),
       union_value_namespacing(true),
       allow_non_utf8(false),
-      lang(IDLOptions::kJava) {}
+      lang(IDLOptions::kJava),
+      lang_to_generate(0) {}
 };
 
 // This encapsulates where the parser is in the current source file.