diff --git a/src/idl_gen_cpp.cpp b/src/idl_gen_cpp.cpp
new file mode 100644
index 0000000..b667ea4
--- /dev/null
+++ b/src/idl_gen_cpp.cpp
@@ -0,0 +1,2972 @@
+/*
+ * Copyright 2014 Google Inc. All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// independent from idl_parser, since this code is not needed for most clients
+
+#include "flatbuffers/code_generators.h"
+#include "flatbuffers/flatbuffers.h"
+#include "flatbuffers/idl.h"
+#include "flatbuffers/util.h"
+
+#include <unordered_set>
+
+namespace flatbuffers {
+
+// Pedantic warning free version of toupper().
+inline char ToUpper(char c) { return static_cast<char>(::toupper(c)); }
+
+// Make numerical literal with type-suffix.
+// This function is only needed for C++! Other languages do not need it.
+static inline std::string NumToStringCpp(std::string val, BaseType type) {
+  // Avoid issues with -2147483648, -9223372036854775808.
+  switch (type) {
+    case BASE_TYPE_INT:
+      return (val != "-2147483648") ? val : ("(-2147483647 - 1)");
+    case BASE_TYPE_ULONG: return (val == "0") ? val : (val + "ULL");
+    case BASE_TYPE_LONG:
+      if (val == "-9223372036854775808")
+        return "(-9223372036854775807LL - 1LL)";
+      else
+        return (val == "0") ? val : (val + "LL");
+    default: return val;
+  }
+}
+
+static std::string GeneratedFileName(const std::string &path,
+                                     const std::string &file_name) {
+  return path + file_name + "_generated.h";
+}
+
+namespace cpp {
+class CppGenerator : public BaseGenerator {
+ public:
+  CppGenerator(const Parser &parser, const std::string &path,
+               const std::string &file_name)
+      : BaseGenerator(parser, path, file_name, "", "::"),
+        cur_name_space_(nullptr),
+        float_const_gen_("std::numeric_limits<double>::",
+                         "std::numeric_limits<float>::", "quiet_NaN()",
+                         "infinity()") {
+    static const char *const keywords[] = {
+      "alignas",
+      "alignof",
+      "and",
+      "and_eq",
+      "asm",
+      "atomic_cancel",
+      "atomic_commit",
+      "atomic_noexcept",
+      "auto",
+      "bitand",
+      "bitor",
+      "bool",
+      "break",
+      "case",
+      "catch",
+      "char",
+      "char16_t",
+      "char32_t",
+      "class",
+      "compl",
+      "concept",
+      "const",
+      "constexpr",
+      "const_cast",
+      "continue",
+      "co_await",
+      "co_return",
+      "co_yield",
+      "decltype",
+      "default",
+      "delete",
+      "do",
+      "double",
+      "dynamic_cast",
+      "else",
+      "enum",
+      "explicit",
+      "export",
+      "extern",
+      "false",
+      "float",
+      "for",
+      "friend",
+      "goto",
+      "if",
+      "import",
+      "inline",
+      "int",
+      "long",
+      "module",
+      "mutable",
+      "namespace",
+      "new",
+      "noexcept",
+      "not",
+      "not_eq",
+      "nullptr",
+      "operator",
+      "or",
+      "or_eq",
+      "private",
+      "protected",
+      "public",
+      "register",
+      "reinterpret_cast",
+      "requires",
+      "return",
+      "short",
+      "signed",
+      "sizeof",
+      "static",
+      "static_assert",
+      "static_cast",
+      "struct",
+      "switch",
+      "synchronized",
+      "template",
+      "this",
+      "thread_local",
+      "throw",
+      "true",
+      "try",
+      "typedef",
+      "typeid",
+      "typename",
+      "union",
+      "unsigned",
+      "using",
+      "virtual",
+      "void",
+      "volatile",
+      "wchar_t",
+      "while",
+      "xor",
+      "xor_eq",
+      nullptr,
+    };
+    for (auto kw = keywords; *kw; kw++) keywords_.insert(*kw);
+  }
+
+  std::string GenIncludeGuard() const {
+    // Generate include guard.
+    std::string guard = file_name_;
+    // Remove any non-alpha-numeric characters that may appear in a filename.
+    struct IsAlnum {
+      bool operator()(char c) const { return !is_alnum(c); }
+    };
+    guard.erase(std::remove_if(guard.begin(), guard.end(), IsAlnum()),
+                guard.end());
+    guard = "FLATBUFFERS_GENERATED_" + guard;
+    guard += "_";
+    // For further uniqueness, also add the namespace.
+    auto name_space = parser_.current_namespace_;
+    for (auto it = name_space->components.begin();
+         it != name_space->components.end(); ++it) {
+      guard += *it + "_";
+    }
+    guard += "H_";
+    std::transform(guard.begin(), guard.end(), guard.begin(), ToUpper);
+    return guard;
+  }
+
+  void GenIncludeDependencies() {
+    int num_includes = 0;
+    for (auto it = parser_.native_included_files_.begin();
+         it != parser_.native_included_files_.end(); ++it) {
+      code_ += "#include \"" + *it + "\"";
+      num_includes++;
+    }
+    for (auto it = parser_.included_files_.begin();
+         it != parser_.included_files_.end(); ++it) {
+      if (it->second.empty()) continue;
+      auto noext = flatbuffers::StripExtension(it->second);
+      auto basename = flatbuffers::StripPath(noext);
+
+      code_ += "#include \"" + parser_.opts.include_prefix +
+               (parser_.opts.keep_include_path ? noext : basename) +
+               "_generated.h\"";
+      num_includes++;
+    }
+    if (num_includes) code_ += "";
+  }
+
+  void GenExtraIncludes() {
+    for(std::size_t i = 0; i < parser_.opts.cpp_includes.size(); ++i) {
+      code_ += "#include \"" + parser_.opts.cpp_includes[i] + "\"";
+    }
+    if (!parser_.opts.cpp_includes.empty()) {
+      code_ += "";
+    }
+  }
+
+  std::string EscapeKeyword(const std::string &name) const {
+    return keywords_.find(name) == keywords_.end() ? name : name + "_";
+  }
+
+  std::string Name(const Definition &def) const {
+    return EscapeKeyword(def.name);
+  }
+
+  std::string Name(const EnumVal &ev) const { return EscapeKeyword(ev.name); }
+
+  // Iterate through all definitions we haven't generate code for (enums,
+  // structs, and tables) and output them to a single file.
+  bool generate() {
+    code_.Clear();
+    code_ += "// " + std::string(FlatBuffersGeneratedWarning()) + "\n\n";
+
+    const auto include_guard = GenIncludeGuard();
+    code_ += "#ifndef " + include_guard;
+    code_ += "#define " + include_guard;
+    code_ += "";
+
+    if (parser_.opts.gen_nullable) {
+      code_ += "#pragma clang system_header\n\n";
+    }
+
+    code_ += "#include \"flatbuffers/flatbuffers.h\"";
+    if (parser_.uses_flexbuffers_) {
+      code_ += "#include \"flatbuffers/flexbuffers.h\"";
+    }
+    code_ += "";
+
+    if (parser_.opts.include_dependence_headers) { GenIncludeDependencies(); }
+    GenExtraIncludes();
+
+    FLATBUFFERS_ASSERT(!cur_name_space_);
+
+    // Generate forward declarations for all structs/tables, since they may
+    // have circular references.
+    for (auto it = parser_.structs_.vec.begin();
+         it != parser_.structs_.vec.end(); ++it) {
+      const auto &struct_def = **it;
+      if (!struct_def.generated) {
+        SetNameSpace(struct_def.defined_namespace);
+        code_ += "struct " + Name(struct_def) + ";";
+        if (parser_.opts.generate_object_based_api) {
+          auto nativeName =
+              NativeName(Name(struct_def), &struct_def, parser_.opts);
+          if (!struct_def.fixed) { code_ += "struct " + nativeName + ";"; }
+        }
+        code_ += "";
+      }
+    }
+
+    // Generate forward declarations for all equal operators
+    if (parser_.opts.generate_object_based_api && parser_.opts.gen_compare) {
+      for (auto it = parser_.structs_.vec.begin();
+           it != parser_.structs_.vec.end(); ++it) {
+        const auto &struct_def = **it;
+        if (!struct_def.generated) {
+          SetNameSpace(struct_def.defined_namespace);
+          auto nativeName =
+              NativeName(Name(struct_def), &struct_def, parser_.opts);
+          code_ += "bool operator==(const " + nativeName + " &lhs, const " +
+                   nativeName + " &rhs);";
+          code_ += "bool operator!=(const " + nativeName + " &lhs, const " +
+              nativeName + " &rhs);";
+        }
+      }
+      code_ += "";
+    }
+
+    // Generate preablmle code for mini reflection.
+    if (parser_.opts.mini_reflect != IDLOptions::kNone) {
+      // To break cyclic dependencies, first pre-declare all tables/structs.
+      for (auto it = parser_.structs_.vec.begin();
+           it != parser_.structs_.vec.end(); ++it) {
+        const auto &struct_def = **it;
+        if (!struct_def.generated) {
+          SetNameSpace(struct_def.defined_namespace);
+          GenMiniReflectPre(&struct_def);
+        }
+      }
+    }
+
+    // Generate code for all the enum declarations.
+    for (auto it = parser_.enums_.vec.begin(); it != parser_.enums_.vec.end();
+         ++it) {
+      const auto &enum_def = **it;
+      if (!enum_def.generated) {
+        SetNameSpace(enum_def.defined_namespace);
+        GenEnum(enum_def);
+      }
+    }
+
+    // Generate code for all structs, then all tables.
+    for (auto it = parser_.structs_.vec.begin();
+         it != parser_.structs_.vec.end(); ++it) {
+      const auto &struct_def = **it;
+      if (struct_def.fixed && !struct_def.generated) {
+        SetNameSpace(struct_def.defined_namespace);
+        GenStruct(struct_def);
+      }
+    }
+    for (auto it = parser_.structs_.vec.begin();
+         it != parser_.structs_.vec.end(); ++it) {
+      const auto &struct_def = **it;
+      if (!struct_def.fixed && !struct_def.generated) {
+        SetNameSpace(struct_def.defined_namespace);
+        GenTable(struct_def);
+      }
+    }
+    for (auto it = parser_.structs_.vec.begin();
+         it != parser_.structs_.vec.end(); ++it) {
+      const auto &struct_def = **it;
+      if (!struct_def.fixed && !struct_def.generated) {
+        SetNameSpace(struct_def.defined_namespace);
+        GenTablePost(struct_def);
+      }
+    }
+
+    // Generate code for union verifiers.
+    for (auto it = parser_.enums_.vec.begin(); it != parser_.enums_.vec.end();
+         ++it) {
+      const auto &enum_def = **it;
+      if (enum_def.is_union && !enum_def.generated) {
+        SetNameSpace(enum_def.defined_namespace);
+        GenUnionPost(enum_def);
+      }
+    }
+
+    // Generate code for mini reflection.
+    if (parser_.opts.mini_reflect != IDLOptions::kNone) {
+      // Then the unions/enums that may refer to them.
+      for (auto it = parser_.enums_.vec.begin(); it != parser_.enums_.vec.end();
+           ++it) {
+        const auto &enum_def = **it;
+        if (!enum_def.generated) {
+          SetNameSpace(enum_def.defined_namespace);
+          GenMiniReflect(nullptr, &enum_def);
+        }
+      }
+      // Then the full tables/structs.
+      for (auto it = parser_.structs_.vec.begin();
+           it != parser_.structs_.vec.end(); ++it) {
+        const auto &struct_def = **it;
+        if (!struct_def.generated) {
+          SetNameSpace(struct_def.defined_namespace);
+          GenMiniReflect(&struct_def, nullptr);
+        }
+      }
+    }
+
+    // Generate convenient global helper functions:
+    if (parser_.root_struct_def_) {
+      auto &struct_def = *parser_.root_struct_def_;
+      SetNameSpace(struct_def.defined_namespace);
+      auto name = Name(struct_def);
+      auto qualified_name = cur_name_space_->GetFullyQualifiedName(name);
+      auto cpp_name = TranslateNameSpace(qualified_name);
+
+      code_.SetValue("STRUCT_NAME", name);
+      code_.SetValue("CPP_NAME", cpp_name);
+      code_.SetValue("NULLABLE_EXT", NullableExtension());
+
+      // The root datatype accessor:
+      code_ += "inline \\";
+      code_ +=
+          "const {{CPP_NAME}} *{{NULLABLE_EXT}}Get{{STRUCT_NAME}}(const void "
+          "*buf) {";
+      code_ += "  return flatbuffers::GetRoot<{{CPP_NAME}}>(buf);";
+      code_ += "}";
+      code_ += "";
+
+      code_ += "inline \\";
+      code_ +=
+          "const {{CPP_NAME}} "
+          "*{{NULLABLE_EXT}}GetSizePrefixed{{STRUCT_NAME}}(const void "
+          "*buf) {";
+      code_ += "  return flatbuffers::GetSizePrefixedRoot<{{CPP_NAME}}>(buf);";
+      code_ += "}";
+      code_ += "";
+
+      if (parser_.opts.mutable_buffer) {
+        code_ += "inline \\";
+        code_ += "{{STRUCT_NAME}} *GetMutable{{STRUCT_NAME}}(void *buf) {";
+        code_ += "  return flatbuffers::GetMutableRoot<{{STRUCT_NAME}}>(buf);";
+        code_ += "}";
+        code_ += "";
+      }
+
+      if (parser_.file_identifier_.length()) {
+        // Return the identifier
+        code_ += "inline const char *{{STRUCT_NAME}}Identifier() {";
+        code_ += "  return \"" + parser_.file_identifier_ + "\";";
+        code_ += "}";
+        code_ += "";
+
+        // Check if a buffer has the identifier.
+        code_ += "inline \\";
+        code_ += "bool {{STRUCT_NAME}}BufferHasIdentifier(const void *buf) {";
+        code_ += "  return flatbuffers::BufferHasIdentifier(";
+        code_ += "      buf, {{STRUCT_NAME}}Identifier());";
+        code_ += "}";
+        code_ += "";
+      }
+
+      // The root verifier.
+      if (parser_.file_identifier_.length()) {
+        code_.SetValue("ID", name + "Identifier()");
+      } else {
+        code_.SetValue("ID", "nullptr");
+      }
+
+      code_ += "inline bool Verify{{STRUCT_NAME}}Buffer(";
+      code_ += "    flatbuffers::Verifier &verifier) {";
+      code_ += "  return verifier.VerifyBuffer<{{CPP_NAME}}>({{ID}});";
+      code_ += "}";
+      code_ += "";
+
+      code_ += "inline bool VerifySizePrefixed{{STRUCT_NAME}}Buffer(";
+      code_ += "    flatbuffers::Verifier &verifier) {";
+      code_ +=
+          "  return verifier.VerifySizePrefixedBuffer<{{CPP_NAME}}>({{ID}});";
+      code_ += "}";
+      code_ += "";
+
+      if (parser_.file_extension_.length()) {
+        // Return the extension
+        code_ += "inline const char *{{STRUCT_NAME}}Extension() {";
+        code_ += "  return \"" + parser_.file_extension_ + "\";";
+        code_ += "}";
+        code_ += "";
+      }
+
+      // Finish a buffer with a given root object:
+      code_ += "inline void Finish{{STRUCT_NAME}}Buffer(";
+      code_ += "    flatbuffers::FlatBufferBuilder &fbb,";
+      code_ += "    flatbuffers::Offset<{{CPP_NAME}}> root) {";
+      if (parser_.file_identifier_.length())
+        code_ += "  fbb.Finish(root, {{STRUCT_NAME}}Identifier());";
+      else
+        code_ += "  fbb.Finish(root);";
+      code_ += "}";
+      code_ += "";
+
+      code_ += "inline void FinishSizePrefixed{{STRUCT_NAME}}Buffer(";
+      code_ += "    flatbuffers::FlatBufferBuilder &fbb,";
+      code_ += "    flatbuffers::Offset<{{CPP_NAME}}> root) {";
+      if (parser_.file_identifier_.length())
+        code_ += "  fbb.FinishSizePrefixed(root, {{STRUCT_NAME}}Identifier());";
+      else
+        code_ += "  fbb.FinishSizePrefixed(root);";
+      code_ += "}";
+      code_ += "";
+
+      if (parser_.opts.generate_object_based_api) {
+        // A convenient root unpack function.
+        auto native_name =
+            NativeName(WrapInNameSpace(struct_def), &struct_def, parser_.opts);
+        code_.SetValue("UNPACK_RETURN",
+                       GenTypeNativePtr(native_name, nullptr, false));
+        code_.SetValue("UNPACK_TYPE",
+                       GenTypeNativePtr(native_name, nullptr, true));
+
+        code_ += "inline {{UNPACK_RETURN}} UnPack{{STRUCT_NAME}}(";
+        code_ += "    const void *buf,";
+        code_ += "    const flatbuffers::resolver_function_t *res = nullptr) {";
+        code_ += "  return {{UNPACK_TYPE}}\\";
+        code_ += "(Get{{STRUCT_NAME}}(buf)->UnPack(res));";
+        code_ += "}";
+        code_ += "";
+
+        code_ += "inline {{UNPACK_RETURN}} UnPackSizePrefixed{{STRUCT_NAME}}(";
+        code_ += "    const void *buf,";
+        code_ += "    const flatbuffers::resolver_function_t *res = nullptr) {";
+        code_ += "  return {{UNPACK_TYPE}}\\";
+        code_ += "(GetSizePrefixed{{STRUCT_NAME}}(buf)->UnPack(res));";
+        code_ += "}";
+        code_ += "";
+      }
+    }
+
+    if (cur_name_space_) SetNameSpace(nullptr);
+
+    // Close the include guard.
+    code_ += "#endif  // " + include_guard;
+
+    const auto file_path = GeneratedFileName(path_, file_name_);
+    const auto final_code = code_.ToString();
+    return SaveFile(file_path.c_str(), final_code, false);
+  }
+
+ private:
+  CodeWriter code_;
+
+  std::unordered_set<std::string> keywords_;
+
+  // This tracks the current namespace so we can insert namespace declarations.
+  const Namespace *cur_name_space_;
+
+  const Namespace *CurrentNameSpace() const { return cur_name_space_; }
+
+  // Translates a qualified name in flatbuffer text format to the same name in
+  // the equivalent C++ namespace.
+  static std::string TranslateNameSpace(const std::string &qualified_name) {
+    std::string cpp_qualified_name = qualified_name;
+    size_t start_pos = 0;
+    while ((start_pos = cpp_qualified_name.find('.', start_pos)) !=
+           std::string::npos) {
+      cpp_qualified_name.replace(start_pos, 1, "::");
+    }
+    return cpp_qualified_name;
+  }
+
+  void GenComment(const std::vector<std::string> &dc, const char *prefix = "") {
+    std::string text;
+    ::flatbuffers::GenComment(dc, &text, nullptr, prefix);
+    code_ += text + "\\";
+  }
+
+  // Return a C++ type from the table in idl.h
+  std::string GenTypeBasic(const Type &type, bool user_facing_type) const {
+    // clang-format off
+    static const char *const ctypename[] = {
+    #define FLATBUFFERS_TD(ENUM, IDLTYPE, CTYPE, JTYPE, GTYPE, NTYPE, PTYPE, \
+                           RTYPE, KTYPE) \
+            #CTYPE,
+        FLATBUFFERS_GEN_TYPES(FLATBUFFERS_TD)
+    #undef FLATBUFFERS_TD
+    };
+    // clang-format on
+    if (user_facing_type) {
+      if (type.enum_def) return WrapInNameSpace(*type.enum_def);
+      if (type.base_type == BASE_TYPE_BOOL) return "bool";
+    }
+    return ctypename[type.base_type];
+  }
+
+  // Return a C++ pointer type, specialized to the actual struct/table types,
+  // and vector element types.
+  std::string GenTypePointer(const Type &type) const {
+    switch (type.base_type) {
+      case BASE_TYPE_STRING: {
+        return "flatbuffers::String";
+      }
+      case BASE_TYPE_VECTOR: {
+        const auto type_name = GenTypeWire(type.VectorType(), "", false);
+        return "flatbuffers::Vector<" + type_name + ">";
+      }
+      case BASE_TYPE_STRUCT: {
+        return WrapInNameSpace(*type.struct_def);
+      }
+      case BASE_TYPE_UNION:
+      // fall through
+      default: { return "void"; }
+    }
+  }
+
+  // Return a C++ type for any type (scalar/pointer) specifically for
+  // building a flatbuffer.
+  std::string GenTypeWire(const Type &type, const char *postfix,
+                          bool user_facing_type) const {
+    if (IsScalar(type.base_type)) {
+      return GenTypeBasic(type, user_facing_type) + postfix;
+    } else if (IsStruct(type)) {
+      return "const " + GenTypePointer(type) + " *";
+    } else {
+      return "flatbuffers::Offset<" + GenTypePointer(type) + ">" + postfix;
+    }
+  }
+
+  // Return a C++ type for any type (scalar/pointer) that reflects its
+  // serialized size.
+  std::string GenTypeSize(const Type &type) const {
+    if (IsScalar(type.base_type)) {
+      return GenTypeBasic(type, false);
+    } else if (IsStruct(type)) {
+      return GenTypePointer(type);
+    } else {
+      return "flatbuffers::uoffset_t";
+    }
+  }
+
+  std::string NullableExtension() {
+    return parser_.opts.gen_nullable ? " _Nullable " : "";
+  }
+
+  static std::string NativeName(const std::string &name, const StructDef *sd,
+                                const IDLOptions &opts) {
+    return sd && !sd->fixed ? opts.object_prefix + name + opts.object_suffix
+                            : name;
+  }
+
+  const std::string &PtrType(const FieldDef *field) {
+    auto attr = field ? field->attributes.Lookup("cpp_ptr_type") : nullptr;
+    return attr ? attr->constant : parser_.opts.cpp_object_api_pointer_type;
+  }
+
+  const std::string NativeString(const FieldDef *field) {
+    auto attr = field ? field->attributes.Lookup("cpp_str_type") : nullptr;
+    auto &ret = attr ? attr->constant : parser_.opts.cpp_object_api_string_type;
+    if (ret.empty()) { return "std::string"; }
+    return ret;
+  }
+
+  bool FlexibleStringConstructor(const FieldDef *field) {
+    auto attr = field
+                    ? (field->attributes.Lookup("cpp_str_flex_ctor") != nullptr)
+                    : false;
+    auto ret =
+        attr ? attr : parser_.opts.cpp_object_api_string_flexible_constructor;
+    return ret && NativeString(field) !=
+                      "std::string";  // Only for custom string types.
+  }
+
+  std::string GenTypeNativePtr(const std::string &type, const FieldDef *field,
+                               bool is_constructor) {
+    auto &ptr_type = PtrType(field);
+    if (ptr_type != "naked") {
+      return (ptr_type != "default_ptr_type"
+                  ? ptr_type
+                  : parser_.opts.cpp_object_api_pointer_type) +
+             "<" + type + ">";
+    } else if (is_constructor) {
+      return "";
+    } else {
+      return type + " *";
+    }
+  }
+
+  std::string GenPtrGet(const FieldDef &field) {
+    auto cpp_ptr_type_get = field.attributes.Lookup("cpp_ptr_type_get");
+    if (cpp_ptr_type_get) return cpp_ptr_type_get->constant;
+    auto &ptr_type = PtrType(&field);
+    return ptr_type == "naked" ? "" : ".get()";
+  }
+
+  std::string GenTypeNative(const Type &type, bool invector,
+                            const FieldDef &field) {
+    switch (type.base_type) {
+      case BASE_TYPE_STRING: {
+        return NativeString(&field);
+      }
+      case BASE_TYPE_VECTOR: {
+        const auto type_name = GenTypeNative(type.VectorType(), true, field);
+        if (type.struct_def &&
+            type.struct_def->attributes.Lookup("native_custom_alloc")) {
+          auto native_custom_alloc =
+              type.struct_def->attributes.Lookup("native_custom_alloc");
+          return "std::vector<" + type_name + "," +
+                 native_custom_alloc->constant + "<" + type_name + ">>";
+        } else
+          return "std::vector<" + type_name + ">";
+      }
+      case BASE_TYPE_STRUCT: {
+        auto type_name = WrapInNameSpace(*type.struct_def);
+        if (IsStruct(type)) {
+          auto native_type = type.struct_def->attributes.Lookup("native_type");
+          if (native_type) { type_name = native_type->constant; }
+          if (invector || field.native_inline) {
+            return type_name;
+          } else {
+            return GenTypeNativePtr(type_name, &field, false);
+          }
+        } else {
+          return GenTypeNativePtr(
+              NativeName(type_name, type.struct_def, parser_.opts), &field,
+              false);
+        }
+      }
+      case BASE_TYPE_UNION: {
+        return type.enum_def->name + "Union";
+      }
+      default: { return GenTypeBasic(type, true); }
+    }
+  }
+
+  // Return a C++ type for any type (scalar/pointer) specifically for
+  // using a flatbuffer.
+  std::string GenTypeGet(const Type &type, const char *afterbasic,
+                         const char *beforeptr, const char *afterptr,
+                         bool user_facing_type) {
+    if (IsScalar(type.base_type)) {
+      return GenTypeBasic(type, user_facing_type) + afterbasic;
+    } else if (IsArray(type)) {
+      auto element_type = type.VectorType();
+      return beforeptr +
+             (IsScalar(element_type.base_type)
+                  ? GenTypeBasic(element_type, user_facing_type)
+                  : GenTypePointer(element_type)) +
+             afterptr;
+    } else {
+      return beforeptr + GenTypePointer(type) + afterptr;
+    }
+  }
+
+  std::string GenEnumDecl(const EnumDef &enum_def) const {
+    const IDLOptions &opts = parser_.opts;
+    return (opts.scoped_enums ? "enum class " : "enum ") + Name(enum_def);
+  }
+
+  std::string GenEnumValDecl(const EnumDef &enum_def,
+                             const std::string &enum_val) const {
+    const IDLOptions &opts = parser_.opts;
+    return opts.prefixed_enums ? Name(enum_def) + "_" + enum_val : enum_val;
+  }
+
+  std::string GetEnumValUse(const EnumDef &enum_def,
+                            const EnumVal &enum_val) const {
+    const IDLOptions &opts = parser_.opts;
+    if (opts.scoped_enums) {
+      return Name(enum_def) + "::" + Name(enum_val);
+    } else if (opts.prefixed_enums) {
+      return Name(enum_def) + "_" + Name(enum_val);
+    } else {
+      return Name(enum_val);
+    }
+  }
+
+  std::string StripUnionType(const std::string &name) {
+    return name.substr(0, name.size() - strlen(UnionTypeFieldSuffix()));
+  }
+
+  std::string GetUnionElement(const EnumVal &ev, bool wrap, bool actual_type,
+                              bool native_type = false) {
+    if (ev.union_type.base_type == BASE_TYPE_STRUCT) {
+      auto name = actual_type ? ev.union_type.struct_def->name : Name(ev);
+      return wrap ? WrapInNameSpace(ev.union_type.struct_def->defined_namespace,
+                                    name)
+                  : name;
+    } else if (ev.union_type.base_type == BASE_TYPE_STRING) {
+      return actual_type ? (native_type ? "std::string" : "flatbuffers::String")
+                         : Name(ev);
+    } else {
+      FLATBUFFERS_ASSERT(false);
+      return Name(ev);
+    }
+  }
+
+  std::string UnionVerifySignature(const EnumDef &enum_def) {
+    return "bool Verify" + Name(enum_def) +
+           "(flatbuffers::Verifier &verifier, const void *obj, " +
+           Name(enum_def) + " type)";
+  }
+
+  std::string UnionVectorVerifySignature(const EnumDef &enum_def) {
+    return "bool Verify" + Name(enum_def) + "Vector" +
+           "(flatbuffers::Verifier &verifier, " +
+           "const flatbuffers::Vector<flatbuffers::Offset<void>> *values, " +
+           "const flatbuffers::Vector<uint8_t> *types)";
+  }
+
+  std::string UnionUnPackSignature(const EnumDef &enum_def, bool inclass) {
+    return (inclass ? "static " : "") + std::string("void *") +
+           (inclass ? "" : Name(enum_def) + "Union::") +
+           "UnPack(const void *obj, " + Name(enum_def) +
+           " type, const flatbuffers::resolver_function_t *resolver)";
+  }
+
+  std::string UnionPackSignature(const EnumDef &enum_def, bool inclass) {
+    return "flatbuffers::Offset<void> " +
+           (inclass ? "" : Name(enum_def) + "Union::") +
+           "Pack(flatbuffers::FlatBufferBuilder &_fbb, " +
+           "const flatbuffers::rehasher_function_t *_rehasher" +
+           (inclass ? " = nullptr" : "") + ") const";
+  }
+
+  std::string TableCreateSignature(const StructDef &struct_def, bool predecl,
+                                   const IDLOptions &opts) {
+    return "flatbuffers::Offset<" + Name(struct_def) + "> Create" +
+           Name(struct_def) + "(flatbuffers::FlatBufferBuilder &_fbb, const " +
+           NativeName(Name(struct_def), &struct_def, opts) +
+           " *_o, const flatbuffers::rehasher_function_t *_rehasher" +
+           (predecl ? " = nullptr" : "") + ")";
+  }
+
+  std::string TablePackSignature(const StructDef &struct_def, bool inclass,
+                                 const IDLOptions &opts) {
+    return std::string(inclass ? "static " : "") + "flatbuffers::Offset<" +
+           Name(struct_def) + "> " + (inclass ? "" : Name(struct_def) + "::") +
+           "Pack(flatbuffers::FlatBufferBuilder &_fbb, " + "const " +
+           NativeName(Name(struct_def), &struct_def, opts) + "* _o, " +
+           "const flatbuffers::rehasher_function_t *_rehasher" +
+           (inclass ? " = nullptr" : "") + ")";
+  }
+
+  std::string TableUnPackSignature(const StructDef &struct_def, bool inclass,
+                                   const IDLOptions &opts) {
+    return NativeName(Name(struct_def), &struct_def, opts) + " *" +
+           (inclass ? "" : Name(struct_def) + "::") +
+           "UnPack(const flatbuffers::resolver_function_t *_resolver" +
+           (inclass ? " = nullptr" : "") + ") const";
+  }
+
+  std::string TableUnPackToSignature(const StructDef &struct_def, bool inclass,
+                                     const IDLOptions &opts) {
+    return "void " + (inclass ? "" : Name(struct_def) + "::") + "UnPackTo(" +
+           NativeName(Name(struct_def), &struct_def, opts) + " *" +
+           "_o, const flatbuffers::resolver_function_t *_resolver" +
+           (inclass ? " = nullptr" : "") + ") const";
+  }
+
+  void GenMiniReflectPre(const StructDef *struct_def) {
+    code_.SetValue("NAME", struct_def->name);
+    code_ += "inline const flatbuffers::TypeTable *{{NAME}}TypeTable();";
+    code_ += "";
+  }
+
+  void GenMiniReflect(const StructDef *struct_def, const EnumDef *enum_def) {
+    code_.SetValue("NAME", struct_def ? struct_def->name : enum_def->name);
+    code_.SetValue("SEQ_TYPE",
+                   struct_def ? (struct_def->fixed ? "ST_STRUCT" : "ST_TABLE")
+                              : (enum_def->is_union ? "ST_UNION" : "ST_ENUM"));
+    auto num_fields =
+        struct_def ? struct_def->fields.vec.size() : enum_def->size();
+    code_.SetValue("NUM_FIELDS", NumToString(num_fields));
+    std::vector<std::string> names;
+    std::vector<Type> types;
+
+    if (struct_def) {
+      for (auto it = struct_def->fields.vec.begin();
+           it != struct_def->fields.vec.end(); ++it) {
+        const auto &field = **it;
+        names.push_back(Name(field));
+        types.push_back(field.value.type);
+      }
+    } else {
+      for (auto it = enum_def->Vals().begin(); it != enum_def->Vals().end();
+           ++it) {
+        const auto &ev = **it;
+        names.push_back(Name(ev));
+        types.push_back(enum_def->is_union ? ev.union_type
+                                           : Type(enum_def->underlying_type));
+      }
+    }
+    std::string ts;
+    std::vector<std::string> type_refs;
+    for (auto it = types.begin(); it != types.end(); ++it) {
+      auto &type = *it;
+      if (!ts.empty()) ts += ",\n    ";
+      auto is_vector = type.base_type == BASE_TYPE_VECTOR;
+      auto bt = is_vector ? type.element : type.base_type;
+      auto et = IsScalar(bt) || bt == BASE_TYPE_STRING
+                    ? bt - BASE_TYPE_UTYPE + ET_UTYPE
+                    : ET_SEQUENCE;
+      int ref_idx = -1;
+      std::string ref_name =
+          type.struct_def
+              ? WrapInNameSpace(*type.struct_def)
+              : type.enum_def ? WrapInNameSpace(*type.enum_def) : "";
+      if (!ref_name.empty()) {
+        auto rit = type_refs.begin();
+        for (; rit != type_refs.end(); ++rit) {
+          if (*rit == ref_name) {
+            ref_idx = static_cast<int>(rit - type_refs.begin());
+            break;
+          }
+        }
+        if (rit == type_refs.end()) {
+          ref_idx = static_cast<int>(type_refs.size());
+          type_refs.push_back(ref_name);
+        }
+      }
+      ts += "{ flatbuffers::" + std::string(ElementaryTypeNames()[et]) + ", " +
+            NumToString(is_vector) + ", " + NumToString(ref_idx) + " }";
+    }
+    std::string rs;
+    for (auto it = type_refs.begin(); it != type_refs.end(); ++it) {
+      if (!rs.empty()) rs += ",\n    ";
+      rs += *it + "TypeTable";
+    }
+    std::string ns;
+    for (auto it = names.begin(); it != names.end(); ++it) {
+      if (!ns.empty()) ns += ",\n    ";
+      ns += "\"" + *it + "\"";
+    }
+    std::string vs;
+    const auto consecutive_enum_from_zero =
+        enum_def && enum_def->MinValue()->IsZero() &&
+        ((enum_def->size() - 1) == enum_def->Distance());
+    if (enum_def && !consecutive_enum_from_zero) {
+      for (auto it = enum_def->Vals().begin(); it != enum_def->Vals().end();
+           ++it) {
+        const auto &ev = **it;
+        if (!vs.empty()) vs += ", ";
+        vs += NumToStringCpp(enum_def->ToString(ev),
+                             enum_def->underlying_type.base_type);
+      }
+    } else if (struct_def && struct_def->fixed) {
+      for (auto it = struct_def->fields.vec.begin();
+           it != struct_def->fields.vec.end(); ++it) {
+        const auto &field = **it;
+        vs += NumToString(field.value.offset);
+        vs += ", ";
+      }
+      vs += NumToString(struct_def->bytesize);
+    }
+    code_.SetValue("TYPES", ts);
+    code_.SetValue("REFS", rs);
+    code_.SetValue("NAMES", ns);
+    code_.SetValue("VALUES", vs);
+    code_ += "inline const flatbuffers::TypeTable *{{NAME}}TypeTable() {";
+    if (num_fields) {
+      code_ += "  static const flatbuffers::TypeCode type_codes[] = {";
+      code_ += "    {{TYPES}}";
+      code_ += "  };";
+    }
+    if (!type_refs.empty()) {
+      code_ += "  static const flatbuffers::TypeFunction type_refs[] = {";
+      code_ += "    {{REFS}}";
+      code_ += "  };";
+    }
+    if (!vs.empty()) {
+      // Problem with uint64_t values greater than 9223372036854775807ULL.
+      code_ += "  static const int64_t values[] = { {{VALUES}} };";
+    }
+    auto has_names =
+        num_fields && parser_.opts.mini_reflect == IDLOptions::kTypesAndNames;
+    if (has_names) {
+      code_ += "  static const char * const names[] = {";
+      code_ += "    {{NAMES}}";
+      code_ += "  };";
+    }
+    code_ += "  static const flatbuffers::TypeTable tt = {";
+    code_ += std::string("    flatbuffers::{{SEQ_TYPE}}, {{NUM_FIELDS}}, ") +
+             (num_fields ? "type_codes, " : "nullptr, ") +
+             (!type_refs.empty() ? "type_refs, " : "nullptr, ") +
+             (!vs.empty() ? "values, " : "nullptr, ") +
+             (has_names ? "names" : "nullptr");
+    code_ += "  };";
+    code_ += "  return &tt;";
+    code_ += "}";
+    code_ += "";
+  }
+
+  // Generate an enum declaration,
+  // an enum string lookup table,
+  // and an enum array of values
+
+  void GenEnum(const EnumDef &enum_def) {
+    code_.SetValue("ENUM_NAME", Name(enum_def));
+    code_.SetValue("BASE_TYPE", GenTypeBasic(enum_def.underlying_type, false));
+
+    GenComment(enum_def.doc_comment);
+    code_ += GenEnumDecl(enum_def) + "\\";
+    // MSVC doesn't support int64/uint64 enum without explicitly declared enum
+    // type. The value 4611686018427387904ULL is truncated to zero with warning:
+    // "warning C4309: 'initializing': truncation of constant value".
+    auto add_type = parser_.opts.scoped_enums;
+    add_type |= (enum_def.underlying_type.base_type == BASE_TYPE_LONG);
+    add_type |= (enum_def.underlying_type.base_type == BASE_TYPE_ULONG);
+    if (add_type) code_ += " : {{BASE_TYPE}}\\";
+    code_ += " {";
+
+    code_.SetValue("SEP", ",");
+    auto add_sep = false;
+    for (auto it = enum_def.Vals().begin(); it != enum_def.Vals().end(); ++it) {
+      const auto &ev = **it;
+      if (add_sep) code_ += "{{SEP}}";
+      GenComment(ev.doc_comment, "  ");
+      code_.SetValue("KEY", GenEnumValDecl(enum_def, Name(ev)));
+      code_.SetValue("VALUE",
+                     NumToStringCpp(enum_def.ToString(ev),
+                                    enum_def.underlying_type.base_type));
+      code_ += "  {{KEY}} = {{VALUE}}\\";
+      add_sep = true;
+    }
+    const EnumVal *minv = enum_def.MinValue();
+    const EnumVal *maxv = enum_def.MaxValue();
+
+    if (parser_.opts.scoped_enums || parser_.opts.prefixed_enums) {
+      FLATBUFFERS_ASSERT(minv && maxv);
+
+      code_.SetValue("SEP", ",\n");
+      if (enum_def.attributes.Lookup("bit_flags")) {
+        code_.SetValue("KEY", GenEnumValDecl(enum_def, "NONE"));
+        code_.SetValue("VALUE", "0");
+        code_ += "{{SEP}}  {{KEY}} = {{VALUE}}\\";
+
+        code_.SetValue("KEY", GenEnumValDecl(enum_def, "ANY"));
+        code_.SetValue("VALUE",
+                       NumToStringCpp(enum_def.AllFlags(),
+                                      enum_def.underlying_type.base_type));
+        code_ += "{{SEP}}  {{KEY}} = {{VALUE}}\\";
+      } else {  // MIN & MAX are useless for bit_flags
+        code_.SetValue("KEY", GenEnumValDecl(enum_def, "MIN"));
+        code_.SetValue("VALUE", GenEnumValDecl(enum_def, minv->name));
+        code_ += "{{SEP}}  {{KEY}} = {{VALUE}}\\";
+
+        code_.SetValue("KEY", GenEnumValDecl(enum_def, "MAX"));
+        code_.SetValue("VALUE", GenEnumValDecl(enum_def, maxv->name));
+        code_ += "{{SEP}}  {{KEY}} = {{VALUE}}\\";
+      }
+    }
+    code_ += "";
+    code_ += "};";
+
+    if (parser_.opts.scoped_enums && enum_def.attributes.Lookup("bit_flags")) {
+      code_ +=
+          "FLATBUFFERS_DEFINE_BITMASK_OPERATORS({{ENUM_NAME}}, {{BASE_TYPE}})";
+    }
+    code_ += "";
+
+    // Generate an array of all enumeration values
+    auto num_fields = NumToString(enum_def.size());
+    code_ += "inline const {{ENUM_NAME}} (&EnumValues{{ENUM_NAME}}())[" +
+             num_fields + "] {";
+    code_ += "  static const {{ENUM_NAME}} values[] = {";
+    for (auto it = enum_def.Vals().begin(); it != enum_def.Vals().end(); ++it) {
+      const auto &ev = **it;
+      auto value = GetEnumValUse(enum_def, ev);
+      auto suffix = *it != enum_def.Vals().back() ? "," : "";
+      code_ += "    " + value + suffix;
+    }
+    code_ += "  };";
+    code_ += "  return values;";
+    code_ += "}";
+    code_ += "";
+
+    // Generate a generate string table for enum values.
+    // Problem is, if values are very sparse that could generate really big
+    // tables. Ideally in that case we generate a map lookup instead, but for
+    // the moment we simply don't output a table at all.
+    auto range = enum_def.Distance();
+    // Average distance between values above which we consider a table
+    // "too sparse". Change at will.
+    static const uint64_t kMaxSparseness = 5;
+    if (range / static_cast<uint64_t>(enum_def.size()) < kMaxSparseness) {
+      code_ += "inline const char * const *EnumNames{{ENUM_NAME}}() {";
+      code_ += "  static const char * const names[" +
+               NumToString(range + 1 + 1) + "] = {";
+
+      auto val = enum_def.Vals().front();
+      for (auto it = enum_def.Vals().begin(); it != enum_def.Vals().end();
+           ++it) {
+        auto ev = *it;
+        for (auto k = enum_def.Distance(val, ev); k > 1; --k) {
+          code_ += "    \"\",";
+        }
+        val = ev;
+        code_ += "    \"" + Name(*ev) + "\",";
+      }
+      code_ += "    nullptr";
+      code_ += "  };";
+
+      code_ += "  return names;";
+      code_ += "}";
+      code_ += "";
+
+      code_ += "inline const char *EnumName{{ENUM_NAME}}({{ENUM_NAME}} e) {";
+
+      code_ += "  if (e < " + GetEnumValUse(enum_def, *enum_def.MinValue()) +
+               " || e > " + GetEnumValUse(enum_def, *enum_def.MaxValue()) +
+               ") return \"\";";
+
+      code_ += "  const size_t index = static_cast<size_t>(e)\\";
+      if (enum_def.MinValue()->IsNonZero()) {
+        auto vals = GetEnumValUse(enum_def, *enum_def.MinValue());
+        code_ += " - static_cast<size_t>(" + vals + ")\\";
+      }
+      code_ += ";";
+
+      code_ += "  return EnumNames{{ENUM_NAME}}()[index];";
+      code_ += "}";
+      code_ += "";
+    } else {
+      code_ += "inline const char *EnumName{{ENUM_NAME}}({{ENUM_NAME}} e) {";
+
+      code_ += "  switch (e) {";
+
+      for (auto it = enum_def.Vals().begin(); it != enum_def.Vals().end();
+           ++it) {
+        const auto &ev = **it;
+        code_ += "    case " + GetEnumValUse(enum_def, ev) + ": return \"" +
+                 Name(ev) + "\";";
+      }
+
+      code_ += "    default: return \"\";";
+      code_ += "  }";
+
+      code_ += "}";
+      code_ += "";
+    }
+
+    // Generate type traits for unions to map from a type to union enum value.
+    if (enum_def.is_union && !enum_def.uses_multiple_type_instances) {
+      for (auto it = enum_def.Vals().begin(); it != enum_def.Vals().end();
+           ++it) {
+        const auto &ev = **it;
+
+        if (it == enum_def.Vals().begin()) {
+          code_ += "template<typename T> struct {{ENUM_NAME}}Traits {";
+        } else {
+          auto name = GetUnionElement(ev, true, true);
+          code_ += "template<> struct {{ENUM_NAME}}Traits<" + name + "> {";
+        }
+
+        auto value = GetEnumValUse(enum_def, ev);
+        code_ += "  static const {{ENUM_NAME}} enum_value = " + value + ";";
+        code_ += "};";
+        code_ += "";
+      }
+    }
+
+    if (parser_.opts.generate_object_based_api && enum_def.is_union) {
+      // Generate a union type
+      code_.SetValue("NAME", Name(enum_def));
+      FLATBUFFERS_ASSERT(enum_def.Lookup("NONE"));
+      code_.SetValue("NONE", GetEnumValUse(enum_def, *enum_def.Lookup("NONE")));
+
+      code_ += "struct {{NAME}}Union {";
+      code_ += "  {{NAME}} type;";
+      code_ += "  void *value;";
+      code_ += "";
+      code_ += "  {{NAME}}Union() : type({{NONE}}), value(nullptr) {}";
+      code_ += "  {{NAME}}Union({{NAME}}Union&& u) FLATBUFFERS_NOEXCEPT :";
+      code_ += "    type({{NONE}}), value(nullptr)";
+      code_ += "    { std::swap(type, u.type); std::swap(value, u.value); }";
+      code_ += "  {{NAME}}Union(const {{NAME}}Union &) FLATBUFFERS_NOEXCEPT;";
+      code_ +=
+          "  {{NAME}}Union &operator=(const {{NAME}}Union &u) "
+          "FLATBUFFERS_NOEXCEPT";
+      code_ +=
+          "    { {{NAME}}Union t(u); std::swap(type, t.type); std::swap(value, "
+          "t.value); return *this; }";
+      code_ +=
+          "  {{NAME}}Union &operator=({{NAME}}Union &&u) FLATBUFFERS_NOEXCEPT";
+      code_ +=
+          "    { std::swap(type, u.type); std::swap(value, u.value); return "
+          "*this; }";
+      code_ += "  ~{{NAME}}Union() { Reset(); }";
+      code_ += "";
+      code_ += "  void Reset();";
+      code_ += "";
+      if (!enum_def.uses_multiple_type_instances) {
+        code_ += "#ifndef FLATBUFFERS_CPP98_STL";
+        code_ += "  template <typename T>";
+        code_ += "  void Set(T&& val) {";
+        code_ += "    using RT = typename std::remove_reference<T>::type;";
+        code_ += "    Reset();";
+        code_ += "    type = {{NAME}}Traits<typename RT::TableType>::enum_value;";
+        code_ += "    if (type != {{NONE}}) {";
+        code_ += "      value = new RT(std::forward<T>(val));";
+        code_ += "    }";
+        code_ += "  }";
+        code_ += "#endif  // FLATBUFFERS_CPP98_STL";
+        code_ += "";
+      }
+      code_ += "  " + UnionUnPackSignature(enum_def, true) + ";";
+      code_ += "  " + UnionPackSignature(enum_def, true) + ";";
+      code_ += "";
+
+      for (auto it = enum_def.Vals().begin(); it != enum_def.Vals().end();
+           ++it) {
+        const auto &ev = **it;
+        if (ev.IsZero()) { continue; }
+
+        const auto native_type =
+            NativeName(GetUnionElement(ev, true, true, true),
+                       ev.union_type.struct_def, parser_.opts);
+        code_.SetValue("NATIVE_TYPE", native_type);
+        code_.SetValue("NATIVE_NAME", Name(ev));
+        code_.SetValue("NATIVE_ID", GetEnumValUse(enum_def, ev));
+
+        code_ += "  {{NATIVE_TYPE}} *As{{NATIVE_NAME}}() {";
+        code_ += "    return type == {{NATIVE_ID}} ?";
+        code_ += "      reinterpret_cast<{{NATIVE_TYPE}} *>(value) : nullptr;";
+        code_ += "  }";
+
+        code_ += "  const {{NATIVE_TYPE}} *As{{NATIVE_NAME}}() const {";
+        code_ += "    return type == {{NATIVE_ID}} ?";
+        code_ +=
+            "      reinterpret_cast<const {{NATIVE_TYPE}} *>(value) : nullptr;";
+        code_ += "  }";
+      }
+      code_ += "};";
+      code_ += "";
+
+      if (parser_.opts.gen_compare) {
+        code_ += "";
+        code_ +=
+            "inline bool operator==(const {{NAME}}Union &lhs, const "
+            "{{NAME}}Union &rhs) {";
+        code_ += "  if (lhs.type != rhs.type) return false;";
+        code_ += "  switch (lhs.type) {";
+
+        for (auto it = enum_def.Vals().begin(); it != enum_def.Vals().end();
+             ++it) {
+          const auto &ev = **it;
+          code_.SetValue("NATIVE_ID", GetEnumValUse(enum_def, ev));
+          if (ev.IsNonZero()) {
+            const auto native_type =
+                NativeName(GetUnionElement(ev, true, true, true),
+                           ev.union_type.struct_def, parser_.opts);
+            code_.SetValue("NATIVE_TYPE", native_type);
+            code_ += "    case {{NATIVE_ID}}: {";
+            code_ +=
+                "      return *(reinterpret_cast<const {{NATIVE_TYPE}} "
+                "*>(lhs.value)) ==";
+            code_ +=
+                "             *(reinterpret_cast<const {{NATIVE_TYPE}} "
+                "*>(rhs.value));";
+            code_ += "    }";
+          } else {
+            code_ += "    case {{NATIVE_ID}}: {";
+            code_ += "      return true;";  // "NONE" enum value.
+            code_ += "    }";
+          }
+        }
+        code_ += "    default: {";
+        code_ += "      return false;";
+        code_ += "    }";
+        code_ += "  }";
+        code_ += "}";
+
+        code_ += "";
+        code_ +=
+            "inline bool operator!=(const {{NAME}}Union &lhs, const "
+            "{{NAME}}Union &rhs) {";
+        code_ += "    return !(lhs == rhs);";
+        code_ += "}";
+        code_ += "";
+      }
+    }
+
+    if (enum_def.is_union) {
+      code_ += UnionVerifySignature(enum_def) + ";";
+      code_ += UnionVectorVerifySignature(enum_def) + ";";
+      code_ += "";
+    }
+  }
+
+  void GenUnionPost(const EnumDef &enum_def) {
+    // Generate a verifier function for this union that can be called by the
+    // table verifier functions. It uses a switch case to select a specific
+    // verifier function to call, this should be safe even if the union type
+    // has been corrupted, since the verifiers will simply fail when called
+    // on the wrong type.
+    code_.SetValue("ENUM_NAME", Name(enum_def));
+
+    code_ += "inline " + UnionVerifySignature(enum_def) + " {";
+    code_ += "  switch (type) {";
+    for (auto it = enum_def.Vals().begin(); it != enum_def.Vals().end(); ++it) {
+      const auto &ev = **it;
+      code_.SetValue("LABEL", GetEnumValUse(enum_def, ev));
+
+      if (ev.IsNonZero()) {
+        code_.SetValue("TYPE", GetUnionElement(ev, true, true));
+        code_ += "    case {{LABEL}}: {";
+        auto getptr =
+            "      auto ptr = reinterpret_cast<const {{TYPE}} *>(obj);";
+        if (ev.union_type.base_type == BASE_TYPE_STRUCT) {
+          if (ev.union_type.struct_def->fixed) {
+            code_ += "      return verifier.Verify<{{TYPE}}>(static_cast<const "
+                     "uint8_t *>(obj), 0);";
+          } else {
+            code_ += getptr;
+            code_ += "      return verifier.VerifyTable(ptr);";
+          }
+        } else if (ev.union_type.base_type == BASE_TYPE_STRING) {
+          code_ += getptr;
+          code_ += "      return verifier.VerifyString(ptr);";
+        } else {
+          FLATBUFFERS_ASSERT(false);
+        }
+        code_ += "    }";
+      } else {
+        code_ += "    case {{LABEL}}: {";
+        code_ += "      return true;";  // "NONE" enum value.
+        code_ += "    }";
+      }
+    }
+    code_ += "    default: return false;";
+    code_ += "  }";
+    code_ += "}";
+    code_ += "";
+
+    code_ += "inline " + UnionVectorVerifySignature(enum_def) + " {";
+    code_ += "  if (!values || !types) return !values && !types;";
+    code_ += "  if (values->size() != types->size()) return false;";
+    code_ += "  for (flatbuffers::uoffset_t i = 0; i < values->size(); ++i) {";
+    code_ += "    if (!Verify" + Name(enum_def) + "(";
+    code_ += "        verifier,  values->Get(i), types->GetEnum<" +
+             Name(enum_def) + ">(i))) {";
+    code_ += "      return false;";
+    code_ += "    }";
+    code_ += "  }";
+    code_ += "  return true;";
+    code_ += "}";
+    code_ += "";
+
+    if (parser_.opts.generate_object_based_api) {
+      // Generate union Unpack() and Pack() functions.
+      code_ += "inline " + UnionUnPackSignature(enum_def, false) + " {";
+      code_ += "  switch (type) {";
+      for (auto it = enum_def.Vals().begin(); it != enum_def.Vals().end();
+           ++it) {
+        const auto &ev = **it;
+        if (ev.IsZero()) { continue; }
+
+        code_.SetValue("LABEL", GetEnumValUse(enum_def, ev));
+        code_.SetValue("TYPE", GetUnionElement(ev, true, true));
+        code_ += "    case {{LABEL}}: {";
+        code_ += "      auto ptr = reinterpret_cast<const {{TYPE}} *>(obj);";
+        if (ev.union_type.base_type == BASE_TYPE_STRUCT) {
+          if (ev.union_type.struct_def->fixed) {
+            code_ += "      return new " +
+                     WrapInNameSpace(*ev.union_type.struct_def) + "(*ptr);";
+          } else {
+            code_ += "      return ptr->UnPack(resolver);";
+          }
+        } else if (ev.union_type.base_type == BASE_TYPE_STRING) {
+          code_ += "      return new std::string(ptr->c_str(), ptr->size());";
+        } else {
+          FLATBUFFERS_ASSERT(false);
+        }
+        code_ += "    }";
+      }
+      code_ += "    default: return nullptr;";
+      code_ += "  }";
+      code_ += "}";
+      code_ += "";
+
+      code_ += "inline " + UnionPackSignature(enum_def, false) + " {";
+      code_ += "  switch (type) {";
+      for (auto it = enum_def.Vals().begin(); it != enum_def.Vals().end();
+           ++it) {
+        auto &ev = **it;
+        if (ev.IsZero()) { continue; }
+
+        code_.SetValue("LABEL", GetEnumValUse(enum_def, ev));
+        code_.SetValue("TYPE",
+                       NativeName(GetUnionElement(ev, true, true, true),
+                                  ev.union_type.struct_def, parser_.opts));
+        code_.SetValue("NAME", GetUnionElement(ev, false, true));
+        code_ += "    case {{LABEL}}: {";
+        code_ += "      auto ptr = reinterpret_cast<const {{TYPE}} *>(value);";
+        if (ev.union_type.base_type == BASE_TYPE_STRUCT) {
+          if (ev.union_type.struct_def->fixed) {
+            code_ += "      return _fbb.CreateStruct(*ptr).Union();";
+          } else {
+            code_ +=
+                "      return Create{{NAME}}(_fbb, ptr, _rehasher).Union();";
+          }
+        } else if (ev.union_type.base_type == BASE_TYPE_STRING) {
+          code_ += "      return _fbb.CreateString(*ptr).Union();";
+        } else {
+          FLATBUFFERS_ASSERT(false);
+        }
+        code_ += "    }";
+      }
+      code_ += "    default: return 0;";
+      code_ += "  }";
+      code_ += "}";
+      code_ += "";
+
+      // Union copy constructor
+      code_ +=
+          "inline {{ENUM_NAME}}Union::{{ENUM_NAME}}Union(const "
+          "{{ENUM_NAME}}Union &u) FLATBUFFERS_NOEXCEPT : type(u.type), "
+          "value(nullptr) {";
+      code_ += "  switch (type) {";
+      for (auto it = enum_def.Vals().begin(); it != enum_def.Vals().end();
+           ++it) {
+        const auto &ev = **it;
+        if (ev.IsZero()) { continue; }
+        code_.SetValue("LABEL", GetEnumValUse(enum_def, ev));
+        code_.SetValue("TYPE",
+                       NativeName(GetUnionElement(ev, true, true, true),
+                                  ev.union_type.struct_def, parser_.opts));
+        code_ += "    case {{LABEL}}: {";
+        bool copyable = true;
+        if (ev.union_type.base_type == BASE_TYPE_STRUCT) {
+          // Don't generate code to copy if table is not copyable.
+          // TODO(wvo): make tables copyable instead.
+          for (auto fit = ev.union_type.struct_def->fields.vec.begin();
+               fit != ev.union_type.struct_def->fields.vec.end(); ++fit) {
+            const auto &field = **fit;
+            if (!field.deprecated && field.value.type.struct_def &&
+                !field.native_inline) {
+              copyable = false;
+              break;
+            }
+          }
+        }
+        if (copyable) {
+          code_ +=
+              "      value = new {{TYPE}}(*reinterpret_cast<{{TYPE}} *>"
+              "(u.value));";
+        } else {
+          code_ +=
+              "      FLATBUFFERS_ASSERT(false);  // {{TYPE}} not copyable.";
+        }
+        code_ += "      break;";
+        code_ += "    }";
+      }
+      code_ += "    default:";
+      code_ += "      break;";
+      code_ += "  }";
+      code_ += "}";
+      code_ += "";
+
+      // Union Reset() function.
+      FLATBUFFERS_ASSERT(enum_def.Lookup("NONE"));
+      code_.SetValue("NONE", GetEnumValUse(enum_def, *enum_def.Lookup("NONE")));
+
+      code_ += "inline void {{ENUM_NAME}}Union::Reset() {";
+      code_ += "  switch (type) {";
+      for (auto it = enum_def.Vals().begin(); it != enum_def.Vals().end();
+           ++it) {
+        const auto &ev = **it;
+        if (ev.IsZero()) { continue; }
+        code_.SetValue("LABEL", GetEnumValUse(enum_def, ev));
+        code_.SetValue("TYPE",
+                       NativeName(GetUnionElement(ev, true, true, true),
+                                  ev.union_type.struct_def, parser_.opts));
+        code_ += "    case {{LABEL}}: {";
+        code_ += "      auto ptr = reinterpret_cast<{{TYPE}} *>(value);";
+        code_ += "      delete ptr;";
+        code_ += "      break;";
+        code_ += "    }";
+      }
+      code_ += "    default: break;";
+      code_ += "  }";
+      code_ += "  value = nullptr;";
+      code_ += "  type = {{NONE}};";
+      code_ += "}";
+      code_ += "";
+    }
+  }
+
+  // Generates a value with optionally a cast applied if the field has a
+  // different underlying type from its interface type (currently only the
+  // case for enums. "from" specify the direction, true meaning from the
+  // underlying type to the interface type.
+  std::string GenUnderlyingCast(const FieldDef &field, bool from,
+                                const std::string &val) {
+    if (from && field.value.type.base_type == BASE_TYPE_BOOL) {
+      return val + " != 0";
+    } else if ((field.value.type.enum_def &&
+                IsScalar(field.value.type.base_type)) ||
+               field.value.type.base_type == BASE_TYPE_BOOL) {
+      return "static_cast<" + GenTypeBasic(field.value.type, from) + ">(" +
+             val + ")";
+    } else {
+      return val;
+    }
+  }
+
+  std::string GenFieldOffsetName(const FieldDef &field) {
+    std::string uname = Name(field);
+    std::transform(uname.begin(), uname.end(), uname.begin(), ToUpper);
+    return "VT_" + uname;
+  }
+
+  void GenFullyQualifiedNameGetter(const StructDef &struct_def,
+                                   const std::string &name) {
+    if (!parser_.opts.generate_name_strings) { return; }
+    auto fullname = struct_def.defined_namespace->GetFullyQualifiedName(name);
+    code_.SetValue("NAME", fullname);
+    code_.SetValue("CONSTEXPR", "FLATBUFFERS_CONSTEXPR");
+    code_ += "  static {{CONSTEXPR}} const char *GetFullyQualifiedName() {";
+    code_ += "    return \"{{NAME}}\";";
+    code_ += "  }";
+  }
+
+  std::string GenDefaultConstant(const FieldDef &field) {
+    if (IsFloat(field.value.type.base_type))
+      return float_const_gen_.GenFloatConstant(field);
+    else
+      return NumToStringCpp(field.value.constant, field.value.type.base_type);
+  }
+
+  std::string GetDefaultScalarValue(const FieldDef &field, bool is_ctor) {
+    if (field.value.type.enum_def && IsScalar(field.value.type.base_type)) {
+      auto ev = field.value.type.enum_def->FindByValue(field.value.constant);
+      if (ev) {
+        return WrapInNameSpace(field.value.type.enum_def->defined_namespace,
+                               GetEnumValUse(*field.value.type.enum_def, *ev));
+      } else {
+        return GenUnderlyingCast(
+            field, true,
+            NumToStringCpp(field.value.constant, field.value.type.base_type));
+      }
+    } else if (field.value.type.base_type == BASE_TYPE_BOOL) {
+      return field.value.constant == "0" ? "false" : "true";
+    } else if (field.attributes.Lookup("cpp_type")) {
+      if (is_ctor) {
+        if (PtrType(&field) == "naked") {
+          return "nullptr";
+        } else {
+          return "";
+        }
+      } else {
+        return "0";
+      }
+    } else {
+      return GenDefaultConstant(field);
+    }
+  }
+
+  void GenParam(const FieldDef &field, bool direct, const char *prefix) {
+    code_.SetValue("PRE", prefix);
+    code_.SetValue("PARAM_NAME", Name(field));
+    if (direct && field.value.type.base_type == BASE_TYPE_STRING) {
+      code_.SetValue("PARAM_TYPE", "const char *");
+      code_.SetValue("PARAM_VALUE", "nullptr");
+    } else if (direct && field.value.type.base_type == BASE_TYPE_VECTOR) {
+      const auto vtype = field.value.type.VectorType();
+      std::string type;
+      if (IsStruct(vtype)) {
+        type = WrapInNameSpace(*vtype.struct_def);
+      } else {
+        type = GenTypeWire(vtype, "", false);
+      }
+      code_.SetValue("PARAM_TYPE", "const std::vector<" + type + "> *");
+      code_.SetValue("PARAM_VALUE", "nullptr");
+    } else {
+      code_.SetValue("PARAM_TYPE", GenTypeWire(field.value.type, " ", true));
+      code_.SetValue("PARAM_VALUE", GetDefaultScalarValue(field, false));
+    }
+    code_ += "{{PRE}}{{PARAM_TYPE}}{{PARAM_NAME}} = {{PARAM_VALUE}}\\";
+  }
+
+  // Generate a member, including a default value for scalars and raw pointers.
+  void GenMember(const FieldDef &field) {
+    if (!field.deprecated &&  // Deprecated fields won't be accessible.
+        field.value.type.base_type != BASE_TYPE_UTYPE &&
+        (field.value.type.base_type != BASE_TYPE_VECTOR ||
+         field.value.type.element != BASE_TYPE_UTYPE)) {
+      auto type = GenTypeNative(field.value.type, false, field);
+      auto cpp_type = field.attributes.Lookup("cpp_type");
+      auto full_type =
+          (cpp_type
+               ? (field.value.type.base_type == BASE_TYPE_VECTOR
+                      ? "std::vector<" +
+                            GenTypeNativePtr(cpp_type->constant, &field,
+                                             false) +
+                            "> "
+                      : GenTypeNativePtr(cpp_type->constant, &field, false))
+               : type + " ");
+      code_.SetValue("FIELD_TYPE", full_type);
+      code_.SetValue("FIELD_NAME", Name(field));
+      code_ += "  {{FIELD_TYPE}}{{FIELD_NAME}};";
+    }
+  }
+
+  // Generate the default constructor for this struct. Properly initialize all
+  // scalar members with default values.
+  void GenDefaultConstructor(const StructDef &struct_def) {
+    std::string initializer_list;
+    for (auto it = struct_def.fields.vec.begin();
+         it != struct_def.fields.vec.end(); ++it) {
+      const auto &field = **it;
+      if (!field.deprecated &&  // Deprecated fields won't be accessible.
+          field.value.type.base_type != BASE_TYPE_UTYPE) {
+        auto cpp_type = field.attributes.Lookup("cpp_type");
+        auto native_default = field.attributes.Lookup("native_default");
+        // Scalar types get parsed defaults, raw pointers get nullptrs.
+        if (IsScalar(field.value.type.base_type)) {
+          if (!initializer_list.empty()) { initializer_list += ",\n        "; }
+          initializer_list += Name(field);
+          initializer_list +=
+              "(" +
+              (native_default ? std::string(native_default->constant)
+                              : GetDefaultScalarValue(field, true)) +
+              ")";
+        } else if (field.value.type.base_type == BASE_TYPE_STRUCT) {
+          if (IsStruct(field.value.type)) {
+            if (native_default) {
+              if (!initializer_list.empty()) {
+                initializer_list += ",\n        ";
+              }
+              initializer_list +=
+                  Name(field) + "(" + native_default->constant + ")";
+            }
+          }
+        } else if (cpp_type && field.value.type.base_type != BASE_TYPE_VECTOR) {
+          if (!initializer_list.empty()) { initializer_list += ",\n        "; }
+          initializer_list += Name(field) + "(0)";
+        }
+      }
+    }
+    if (!initializer_list.empty()) {
+      initializer_list = "\n      : " + initializer_list;
+    }
+
+    code_.SetValue("NATIVE_NAME",
+                   NativeName(Name(struct_def), &struct_def, parser_.opts));
+    code_.SetValue("INIT_LIST", initializer_list);
+
+    code_ += "  {{NATIVE_NAME}}(){{INIT_LIST}} {";
+    code_ += "  }";
+  }
+
+  void GenCompareOperator(const StructDef &struct_def,
+                          std::string accessSuffix = "") {
+    std::string compare_op;
+    for (auto it = struct_def.fields.vec.begin();
+         it != struct_def.fields.vec.end(); ++it) {
+      const auto &field = **it;
+      if (!field.deprecated &&  // Deprecated fields won't be accessible.
+          field.value.type.base_type != BASE_TYPE_UTYPE &&
+          (field.value.type.base_type != BASE_TYPE_VECTOR ||
+           field.value.type.element != BASE_TYPE_UTYPE)) {
+        if (!compare_op.empty()) { compare_op += " &&\n      "; }
+        auto accessor = Name(field) + accessSuffix;
+        compare_op += "(lhs." + accessor + " == rhs." + accessor + ")";
+      }
+    }
+
+    std::string cmp_lhs;
+    std::string cmp_rhs;
+    if (compare_op.empty()) {
+      cmp_lhs = "";
+      cmp_rhs = "";
+      compare_op = "  return true;";
+    } else {
+      cmp_lhs = "lhs";
+      cmp_rhs = "rhs";
+      compare_op = "  return\n      " + compare_op + ";";
+    }
+
+    code_.SetValue("CMP_OP", compare_op);
+    code_.SetValue("CMP_LHS", cmp_lhs);
+    code_.SetValue("CMP_RHS", cmp_rhs);
+    code_ += "";
+    code_ +=
+        "inline bool operator==(const {{NATIVE_NAME}} &{{CMP_LHS}}, const "
+        "{{NATIVE_NAME}} &{{CMP_RHS}}) {";
+    code_ += "{{CMP_OP}}";
+    code_ += "}";
+
+    code_ += "";
+    code_ +=
+        "inline bool operator!=(const {{NATIVE_NAME}} &lhs, const "
+        "{{NATIVE_NAME}} &rhs) {";
+    code_ += "    return !(lhs == rhs);";
+    code_ += "}";
+    code_ += "";
+  }
+
+  void GenOperatorNewDelete(const StructDef &struct_def) {
+    if (auto native_custom_alloc =
+            struct_def.attributes.Lookup("native_custom_alloc")) {
+      code_ += "  inline void *operator new (std::size_t count) {";
+      code_ += "    return " + native_custom_alloc->constant +
+               "<{{NATIVE_NAME}}>().allocate(count / sizeof({{NATIVE_NAME}}));";
+      code_ += "  }";
+      code_ += "  inline void operator delete (void *ptr) {";
+      code_ += "    return " + native_custom_alloc->constant +
+               "<{{NATIVE_NAME}}>().deallocate(static_cast<{{NATIVE_NAME}}*>("
+               "ptr),1);";
+      code_ += "  }";
+    }
+  }
+
+  void GenNativeTable(const StructDef &struct_def) {
+    const auto native_name =
+        NativeName(Name(struct_def), &struct_def, parser_.opts);
+    code_.SetValue("STRUCT_NAME", Name(struct_def));
+    code_.SetValue("NATIVE_NAME", native_name);
+
+    // Generate a C++ object that can hold an unpacked version of this table.
+    code_ += "struct {{NATIVE_NAME}} : public flatbuffers::NativeTable {";
+    code_ += "  typedef {{STRUCT_NAME}} TableType;";
+    GenFullyQualifiedNameGetter(struct_def, native_name);
+    for (auto it = struct_def.fields.vec.begin();
+         it != struct_def.fields.vec.end(); ++it) {
+      GenMember(**it);
+    }
+    GenOperatorNewDelete(struct_def);
+    GenDefaultConstructor(struct_def);
+    code_ += "};";
+    if (parser_.opts.gen_compare) GenCompareOperator(struct_def);
+    code_ += "";
+  }
+
+  // Generate the code to call the appropriate Verify function(s) for a field.
+  void GenVerifyCall(const FieldDef &field, const char *prefix) {
+    code_.SetValue("PRE", prefix);
+    code_.SetValue("NAME", Name(field));
+    code_.SetValue("REQUIRED", field.required ? "Required" : "");
+    code_.SetValue("SIZE", GenTypeSize(field.value.type));
+    code_.SetValue("OFFSET", GenFieldOffsetName(field));
+    if (IsScalar(field.value.type.base_type) || IsStruct(field.value.type)) {
+      code_ +=
+          "{{PRE}}VerifyField{{REQUIRED}}<{{SIZE}}>(verifier, {{OFFSET}})\\";
+    } else {
+      code_ += "{{PRE}}VerifyOffset{{REQUIRED}}(verifier, {{OFFSET}})\\";
+    }
+
+    switch (field.value.type.base_type) {
+      case BASE_TYPE_UNION: {
+        code_.SetValue("ENUM_NAME", field.value.type.enum_def->name);
+        code_.SetValue("SUFFIX", UnionTypeFieldSuffix());
+        code_ +=
+            "{{PRE}}Verify{{ENUM_NAME}}(verifier, {{NAME}}(), "
+            "{{NAME}}{{SUFFIX}}())\\";
+        break;
+      }
+      case BASE_TYPE_STRUCT: {
+        if (!field.value.type.struct_def->fixed) {
+          code_ += "{{PRE}}verifier.VerifyTable({{NAME}}())\\";
+        }
+        break;
+      }
+      case BASE_TYPE_STRING: {
+        code_ += "{{PRE}}verifier.VerifyString({{NAME}}())\\";
+        break;
+      }
+      case BASE_TYPE_VECTOR: {
+        code_ += "{{PRE}}verifier.VerifyVector({{NAME}}())\\";
+
+        switch (field.value.type.element) {
+          case BASE_TYPE_STRING: {
+            code_ += "{{PRE}}verifier.VerifyVectorOfStrings({{NAME}}())\\";
+            break;
+          }
+          case BASE_TYPE_STRUCT: {
+            if (!field.value.type.struct_def->fixed) {
+              code_ += "{{PRE}}verifier.VerifyVectorOfTables({{NAME}}())\\";
+            }
+            break;
+          }
+          case BASE_TYPE_UNION: {
+            code_.SetValue("ENUM_NAME", field.value.type.enum_def->name);
+            code_ +=
+                "{{PRE}}Verify{{ENUM_NAME}}Vector(verifier, {{NAME}}(), "
+                "{{NAME}}_type())\\";
+            break;
+          }
+          default: break;
+        }
+        break;
+      }
+      default: { break; }
+    }
+  }
+
+  // Generate CompareWithValue method for a key field.
+  void GenKeyFieldMethods(const FieldDef &field) {
+    FLATBUFFERS_ASSERT(field.key);
+    const bool is_string = (field.value.type.base_type == BASE_TYPE_STRING);
+
+    code_ += "  bool KeyCompareLessThan(const {{STRUCT_NAME}} *o) const {";
+    if (is_string) {
+      // use operator< of flatbuffers::String
+      code_ += "    return *{{FIELD_NAME}}() < *o->{{FIELD_NAME}}();";
+    } else {
+      code_ += "    return {{FIELD_NAME}}() < o->{{FIELD_NAME}}();";
+    }
+    code_ += "  }";
+
+    if (is_string) {
+      code_ += "  int KeyCompareWithValue(const char *val) const {";
+      code_ += "    return strcmp({{FIELD_NAME}}()->c_str(), val);";
+      code_ += "  }";
+    } else {
+      FLATBUFFERS_ASSERT(IsScalar(field.value.type.base_type));
+      auto type = GenTypeBasic(field.value.type, false);
+      if (parser_.opts.scoped_enums && field.value.type.enum_def &&
+          IsScalar(field.value.type.base_type)) {
+        type = GenTypeGet(field.value.type, " ", "const ", " *", true);
+      }
+      // Returns {field<val: -1, field==val: 0, field>val: +1}.
+      code_.SetValue("KEY_TYPE", type);
+      code_ += "  int KeyCompareWithValue({{KEY_TYPE}} val) const {";
+      code_ +=
+          "    return static_cast<int>({{FIELD_NAME}}() > val) - "
+          "static_cast<int>({{FIELD_NAME}}() < val);";
+      code_ += "  }";
+    }
+  }
+
+  // Generate an accessor struct, builder structs & function for a table.
+  void GenTable(const StructDef &struct_def) {
+    if (parser_.opts.generate_object_based_api) { GenNativeTable(struct_def); }
+
+    // Generate an accessor struct, with methods of the form:
+    // type name() const { return GetField<type>(offset, defaultval); }
+    GenComment(struct_def.doc_comment);
+
+    code_.SetValue("STRUCT_NAME", Name(struct_def));
+    code_ +=
+        "struct {{STRUCT_NAME}} FLATBUFFERS_FINAL_CLASS"
+        " : private flatbuffers::Table {";
+    if (parser_.opts.generate_object_based_api) {
+      code_ += "  typedef {{NATIVE_NAME}} NativeTableType;";
+    }
+    if (parser_.opts.mini_reflect != IDLOptions::kNone) {
+      code_ +=
+          "  static const flatbuffers::TypeTable *MiniReflectTypeTable() {";
+      code_ += "    return {{STRUCT_NAME}}TypeTable();";
+      code_ += "  }";
+    }
+
+    GenFullyQualifiedNameGetter(struct_def, Name(struct_def));
+
+    // Generate field id constants.
+    if (struct_def.fields.vec.size() > 0) {
+      // We need to add a trailing comma to all elements except the last one as
+      // older versions of gcc complain about this.
+      code_.SetValue("SEP", "");
+      code_ +=
+          "  enum FlatBuffersVTableOffset FLATBUFFERS_VTABLE_UNDERLYING_TYPE {";
+      for (auto it = struct_def.fields.vec.begin();
+           it != struct_def.fields.vec.end(); ++it) {
+        const auto &field = **it;
+        if (field.deprecated) {
+          // Deprecated fields won't be accessible.
+          continue;
+        }
+
+        code_.SetValue("OFFSET_NAME", GenFieldOffsetName(field));
+        code_.SetValue("OFFSET_VALUE", NumToString(field.value.offset));
+        code_ += "{{SEP}}    {{OFFSET_NAME}} = {{OFFSET_VALUE}}\\";
+        code_.SetValue("SEP", ",\n");
+      }
+      code_ += "";
+      code_ += "  };";
+    }
+
+    // Generate the accessors.
+    for (auto it = struct_def.fields.vec.begin();
+         it != struct_def.fields.vec.end(); ++it) {
+      const auto &field = **it;
+      if (field.deprecated) {
+        // Deprecated fields won't be accessible.
+        continue;
+      }
+
+      const bool is_struct = IsStruct(field.value.type);
+      const bool is_scalar = IsScalar(field.value.type.base_type);
+      code_.SetValue("FIELD_NAME", Name(field));
+
+      // Call a different accessor for pointers, that indirects.
+      std::string accessor = "";
+      if (is_scalar) {
+        accessor = "GetField<";
+      } else if (is_struct) {
+        accessor = "GetStruct<";
+      } else {
+        accessor = "GetPointer<";
+      }
+      auto offset_str = GenFieldOffsetName(field);
+      auto offset_type =
+          GenTypeGet(field.value.type, "", "const ", " *", false);
+
+      auto call = accessor + offset_type + ">(" + offset_str;
+      // Default value as second arg for non-pointer types.
+      if (is_scalar) { call += ", " + GenDefaultConstant(field); }
+      call += ")";
+
+      std::string afterptr = " *" + NullableExtension();
+      GenComment(field.doc_comment, "  ");
+      code_.SetValue("FIELD_TYPE", GenTypeGet(field.value.type, " ", "const ",
+                                              afterptr.c_str(), true));
+      code_.SetValue("FIELD_VALUE", GenUnderlyingCast(field, true, call));
+      code_.SetValue("NULLABLE_EXT", NullableExtension());
+
+      code_ += "  {{FIELD_TYPE}}{{FIELD_NAME}}() const {";
+      code_ += "    return {{FIELD_VALUE}};";
+      code_ += "  }";
+
+      if (field.value.type.base_type == BASE_TYPE_UNION) {
+        auto u = field.value.type.enum_def;
+
+        if (!field.value.type.enum_def->uses_multiple_type_instances)
+          code_ +=
+              "  template<typename T> "
+              "const T *{{NULLABLE_EXT}}{{FIELD_NAME}}_as() const;";
+
+        for (auto u_it = u->Vals().begin(); u_it != u->Vals().end(); ++u_it) {
+          auto &ev = **u_it;
+          if (ev.union_type.base_type == BASE_TYPE_NONE) { continue; }
+          auto full_struct_name = GetUnionElement(ev, true, true);
+
+          // @TODO: Mby make this decisions more universal? How?
+          code_.SetValue("U_GET_TYPE",
+                         EscapeKeyword(field.name + UnionTypeFieldSuffix()));
+          code_.SetValue(
+              "U_ELEMENT_TYPE",
+              WrapInNameSpace(u->defined_namespace, GetEnumValUse(*u, ev)));
+          code_.SetValue("U_FIELD_TYPE", "const " + full_struct_name + " *");
+          code_.SetValue("U_FIELD_NAME", Name(field) + "_as_" + Name(ev));
+          code_.SetValue("U_NULLABLE", NullableExtension());
+
+          // `const Type *union_name_asType() const` accessor.
+          code_ += "  {{U_FIELD_TYPE}}{{U_NULLABLE}}{{U_FIELD_NAME}}() const {";
+          code_ +=
+              "    return {{U_GET_TYPE}}() == {{U_ELEMENT_TYPE}} ? "
+              "static_cast<{{U_FIELD_TYPE}}>({{FIELD_NAME}}()) "
+              ": nullptr;";
+          code_ += "  }";
+        }
+      }
+
+      if (parser_.opts.mutable_buffer) {
+        if (is_scalar) {
+          const auto type = GenTypeWire(field.value.type, "", false);
+          code_.SetValue("SET_FN", "SetField<" + type + ">");
+          code_.SetValue("OFFSET_NAME", offset_str);
+          code_.SetValue("FIELD_TYPE", GenTypeBasic(field.value.type, true));
+          code_.SetValue("FIELD_VALUE",
+                         GenUnderlyingCast(field, false, "_" + Name(field)));
+          code_.SetValue("DEFAULT_VALUE", GenDefaultConstant(field));
+
+          code_ +=
+              "  bool mutate_{{FIELD_NAME}}({{FIELD_TYPE}} "
+              "_{{FIELD_NAME}}) {";
+          code_ +=
+              "    return {{SET_FN}}({{OFFSET_NAME}}, {{FIELD_VALUE}}, "
+              "{{DEFAULT_VALUE}});";
+          code_ += "  }";
+        } else {
+          auto postptr = " *" + NullableExtension();
+          auto type =
+              GenTypeGet(field.value.type, " ", "", postptr.c_str(), true);
+          auto underlying = accessor + type + ">(" + offset_str + ")";
+          code_.SetValue("FIELD_TYPE", type);
+          code_.SetValue("FIELD_VALUE",
+                         GenUnderlyingCast(field, true, underlying));
+
+          code_ += "  {{FIELD_TYPE}}mutable_{{FIELD_NAME}}() {";
+          code_ += "    return {{FIELD_VALUE}};";
+          code_ += "  }";
+        }
+      }
+
+      auto nested = field.attributes.Lookup("nested_flatbuffer");
+      if (nested) {
+        std::string qualified_name = nested->constant;
+        auto nested_root = parser_.LookupStruct(nested->constant);
+        if (nested_root == nullptr) {
+          qualified_name = parser_.current_namespace_->GetFullyQualifiedName(
+              nested->constant);
+          nested_root = parser_.LookupStruct(qualified_name);
+        }
+        FLATBUFFERS_ASSERT(nested_root);  // Guaranteed to exist by parser.
+        (void)nested_root;
+        code_.SetValue("CPP_NAME", TranslateNameSpace(qualified_name));
+
+        code_ += "  const {{CPP_NAME}} *{{FIELD_NAME}}_nested_root() const {";
+        code_ +=
+            "    return "
+            "flatbuffers::GetRoot<{{CPP_NAME}}>({{FIELD_NAME}}()->Data());";
+        code_ += "  }";
+      }
+
+      if (field.flexbuffer) {
+        code_ +=
+            "  flexbuffers::Reference {{FIELD_NAME}}_flexbuffer_root()"
+            " const {";
+        // Both Data() and size() are const-methods, therefore call order
+        // doesn't matter.
+        code_ +=
+            "    return flexbuffers::GetRoot({{FIELD_NAME}}()->Data(), "
+            "{{FIELD_NAME}}()->size());";
+        code_ += "  }";
+      }
+
+      // Generate a comparison function for this field if it is a key.
+      if (field.key) { GenKeyFieldMethods(field); }
+    }
+
+    // Generate a verifier function that can check a buffer from an untrusted
+    // source will never cause reads outside the buffer.
+    code_ += "  bool Verify(flatbuffers::Verifier &verifier) const {";
+    code_ += "    return VerifyTableStart(verifier)\\";
+    for (auto it = struct_def.fields.vec.begin();
+         it != struct_def.fields.vec.end(); ++it) {
+      const auto &field = **it;
+      if (field.deprecated) { continue; }
+      GenVerifyCall(field, " &&\n           ");
+    }
+
+    code_ += " &&\n           verifier.EndTable();";
+    code_ += "  }";
+
+    if (parser_.opts.generate_object_based_api) {
+      // Generate the UnPack() pre declaration.
+      code_ +=
+          "  " + TableUnPackSignature(struct_def, true, parser_.opts) + ";";
+      code_ +=
+          "  " + TableUnPackToSignature(struct_def, true, parser_.opts) + ";";
+      code_ += "  " + TablePackSignature(struct_def, true, parser_.opts) + ";";
+    }
+
+    code_ += "};";  // End of table.
+    code_ += "";
+
+    // Explicit specializations for union accessors
+    for (auto it = struct_def.fields.vec.begin();
+         it != struct_def.fields.vec.end(); ++it) {
+      const auto &field = **it;
+      if (field.deprecated || field.value.type.base_type != BASE_TYPE_UNION) {
+        continue;
+      }
+
+      auto u = field.value.type.enum_def;
+      if (u->uses_multiple_type_instances) continue;
+
+      code_.SetValue("FIELD_NAME", Name(field));
+
+      for (auto u_it = u->Vals().begin(); u_it != u->Vals().end(); ++u_it) {
+        auto &ev = **u_it;
+        if (ev.union_type.base_type == BASE_TYPE_NONE) { continue; }
+
+        auto full_struct_name = GetUnionElement(ev, true, true);
+
+        code_.SetValue(
+            "U_ELEMENT_TYPE",
+            WrapInNameSpace(u->defined_namespace, GetEnumValUse(*u, ev)));
+        code_.SetValue("U_FIELD_TYPE", "const " + full_struct_name + " *");
+        code_.SetValue("U_ELEMENT_NAME", full_struct_name);
+        code_.SetValue("U_FIELD_NAME", Name(field) + "_as_" + Name(ev));
+
+        // `template<> const T *union_name_as<T>() const` accessor.
+        code_ +=
+            "template<> "
+            "inline {{U_FIELD_TYPE}}{{STRUCT_NAME}}::{{FIELD_NAME}}_as"
+            "<{{U_ELEMENT_NAME}}>() const {";
+        code_ += "  return {{U_FIELD_NAME}}();";
+        code_ += "}";
+        code_ += "";
+      }
+    }
+
+    GenBuilders(struct_def);
+
+    if (parser_.opts.generate_object_based_api) {
+      // Generate a pre-declaration for a CreateX method that works with an
+      // unpacked C++ object.
+      code_ += TableCreateSignature(struct_def, true, parser_.opts) + ";";
+      code_ += "";
+    }
+  }
+
+  void GenBuilders(const StructDef &struct_def) {
+    code_.SetValue("STRUCT_NAME", Name(struct_def));
+
+    // Generate a builder struct:
+    code_ += "struct {{STRUCT_NAME}}Builder {";
+    code_ += "  flatbuffers::FlatBufferBuilder &fbb_;";
+    code_ += "  flatbuffers::uoffset_t start_;";
+
+    bool has_string_or_vector_fields = false;
+    for (auto it = struct_def.fields.vec.begin();
+         it != struct_def.fields.vec.end(); ++it) {
+      const auto &field = **it;
+      if (!field.deprecated) {
+        const bool is_scalar = IsScalar(field.value.type.base_type);
+        const bool is_string = field.value.type.base_type == BASE_TYPE_STRING;
+        const bool is_vector = field.value.type.base_type == BASE_TYPE_VECTOR;
+        if (is_string || is_vector) { has_string_or_vector_fields = true; }
+
+        std::string offset = GenFieldOffsetName(field);
+        std::string name = GenUnderlyingCast(field, false, Name(field));
+        std::string value = is_scalar ? GenDefaultConstant(field) : "";
+
+        // Generate accessor functions of the form:
+        // void add_name(type name) {
+        //   fbb_.AddElement<type>(offset, name, default);
+        // }
+        code_.SetValue("FIELD_NAME", Name(field));
+        code_.SetValue("FIELD_TYPE", GenTypeWire(field.value.type, " ", true));
+        code_.SetValue("ADD_OFFSET", Name(struct_def) + "::" + offset);
+        code_.SetValue("ADD_NAME", name);
+        code_.SetValue("ADD_VALUE", value);
+        if (is_scalar) {
+          const auto type = GenTypeWire(field.value.type, "", false);
+          code_.SetValue("ADD_FN", "AddElement<" + type + ">");
+        } else if (IsStruct(field.value.type)) {
+          code_.SetValue("ADD_FN", "AddStruct");
+        } else {
+          code_.SetValue("ADD_FN", "AddOffset");
+        }
+
+        code_ += "  void add_{{FIELD_NAME}}({{FIELD_TYPE}}{{FIELD_NAME}}) {";
+        code_ += "    fbb_.{{ADD_FN}}(\\";
+        if (is_scalar) {
+          code_ += "{{ADD_OFFSET}}, {{ADD_NAME}}, {{ADD_VALUE}});";
+        } else {
+          code_ += "{{ADD_OFFSET}}, {{ADD_NAME}});";
+        }
+        code_ += "  }";
+      }
+    }
+
+    // Builder constructor
+    code_ +=
+        "  explicit {{STRUCT_NAME}}Builder(flatbuffers::FlatBufferBuilder "
+        "&_fbb)";
+    code_ += "        : fbb_(_fbb) {";
+    code_ += "    start_ = fbb_.StartTable();";
+    code_ += "  }";
+
+    // Assignment operator;
+    code_ +=
+        "  {{STRUCT_NAME}}Builder &operator="
+        "(const {{STRUCT_NAME}}Builder &);";
+
+    // Finish() function.
+    code_ += "  flatbuffers::Offset<{{STRUCT_NAME}}> Finish() {";
+    code_ += "    const auto end = fbb_.EndTable(start_);";
+    code_ += "    auto o = flatbuffers::Offset<{{STRUCT_NAME}}>(end);";
+
+    for (auto it = struct_def.fields.vec.begin();
+         it != struct_def.fields.vec.end(); ++it) {
+      const auto &field = **it;
+      if (!field.deprecated && field.required) {
+        code_.SetValue("FIELD_NAME", Name(field));
+        code_.SetValue("OFFSET_NAME", GenFieldOffsetName(field));
+        code_ += "    fbb_.Required(o, {{STRUCT_NAME}}::{{OFFSET_NAME}});";
+      }
+    }
+    code_ += "    return o;";
+    code_ += "  }";
+    code_ += "};";
+    code_ += "";
+
+    // Generate a convenient CreateX function that uses the above builder
+    // to create a table in one go.
+    code_ +=
+        "inline flatbuffers::Offset<{{STRUCT_NAME}}> "
+        "Create{{STRUCT_NAME}}(";
+    code_ += "    flatbuffers::FlatBufferBuilder &_fbb\\";
+    for (auto it = struct_def.fields.vec.begin();
+         it != struct_def.fields.vec.end(); ++it) {
+      const auto &field = **it;
+      if (!field.deprecated) { GenParam(field, false, ",\n    "); }
+    }
+    code_ += ") {";
+
+    code_ += "  {{STRUCT_NAME}}Builder builder_(_fbb);";
+    for (size_t size = struct_def.sortbysize ? sizeof(largest_scalar_t) : 1;
+         size; size /= 2) {
+      for (auto it = struct_def.fields.vec.rbegin();
+           it != struct_def.fields.vec.rend(); ++it) {
+        const auto &field = **it;
+        if (!field.deprecated && (!struct_def.sortbysize ||
+                                  size == SizeOf(field.value.type.base_type))) {
+          code_.SetValue("FIELD_NAME", Name(field));
+          code_ += "  builder_.add_{{FIELD_NAME}}({{FIELD_NAME}});";
+        }
+      }
+    }
+    code_ += "  return builder_.Finish();";
+    code_ += "}";
+    code_ += "";
+
+    // Generate a CreateXDirect function with vector types as parameters
+    if (has_string_or_vector_fields) {
+      code_ +=
+          "inline flatbuffers::Offset<{{STRUCT_NAME}}> "
+          "Create{{STRUCT_NAME}}Direct(";
+      code_ += "    flatbuffers::FlatBufferBuilder &_fbb\\";
+      for (auto it = struct_def.fields.vec.begin();
+           it != struct_def.fields.vec.end(); ++it) {
+        const auto &field = **it;
+        if (!field.deprecated) { GenParam(field, true, ",\n    "); }
+      }
+      // Need to call "Create" with the struct namespace.
+      const auto qualified_create_name =
+          struct_def.defined_namespace->GetFullyQualifiedName("Create");
+      code_.SetValue("CREATE_NAME", TranslateNameSpace(qualified_create_name));
+      code_ += ") {";
+      for (auto it = struct_def.fields.vec.begin();
+           it != struct_def.fields.vec.end(); ++it) {
+        const auto &field = **it;
+        if (!field.deprecated) {
+          code_.SetValue("FIELD_NAME", Name(field));
+          if (field.value.type.base_type == BASE_TYPE_STRING) {
+            if (!field.shared) {
+              code_.SetValue("CREATE_STRING", "CreateString");
+            } else {
+              code_.SetValue("CREATE_STRING", "CreateSharedString");
+            }
+            code_ +=
+                "  auto {{FIELD_NAME}}__ = {{FIELD_NAME}} ? "
+                "_fbb.{{CREATE_STRING}}({{FIELD_NAME}}) : 0;";
+          } else if (field.value.type.base_type == BASE_TYPE_VECTOR) {
+            code_ += "  auto {{FIELD_NAME}}__ = {{FIELD_NAME}} ? \\";
+            const auto vtype = field.value.type.VectorType();
+            if (IsStruct(vtype)) {
+              const auto type = WrapInNameSpace(*vtype.struct_def);
+              code_ += "_fbb.CreateVectorOfStructs<" + type + ">\\";
+            } else {
+              const auto type = GenTypeWire(vtype, "", false);
+              code_ += "_fbb.CreateVector<" + type + ">\\";
+            }
+            code_ += "(*{{FIELD_NAME}}) : 0;";
+          }
+        }
+      }
+      code_ += "  return {{CREATE_NAME}}{{STRUCT_NAME}}(";
+      code_ += "      _fbb\\";
+      for (auto it = struct_def.fields.vec.begin();
+           it != struct_def.fields.vec.end(); ++it) {
+        const auto &field = **it;
+        if (!field.deprecated) {
+          code_.SetValue("FIELD_NAME", Name(field));
+          code_ += ",\n      {{FIELD_NAME}}\\";
+          if (field.value.type.base_type == BASE_TYPE_STRING ||
+              field.value.type.base_type == BASE_TYPE_VECTOR) {
+            code_ += "__\\";
+          }
+        }
+      }
+      code_ += ");";
+      code_ += "}";
+      code_ += "";
+    }
+  }
+
+  std::string GenUnionUnpackVal(const FieldDef &afield,
+                                const char *vec_elem_access,
+                                const char *vec_type_access) {
+    return afield.value.type.enum_def->name + "Union::UnPack(" + "_e" +
+           vec_elem_access + ", " +
+           EscapeKeyword(afield.name + UnionTypeFieldSuffix()) + "()" +
+           vec_type_access + ", _resolver)";
+  }
+
+  std::string GenUnpackVal(const Type &type, const std::string &val,
+                           bool invector, const FieldDef &afield) {
+    switch (type.base_type) {
+      case BASE_TYPE_STRING: {
+        if (FlexibleStringConstructor(&afield)) {
+          return NativeString(&afield) + "(" + val + "->c_str(), " + val +
+                 "->size())";
+        } else {
+          return val + "->str()";
+        }
+      }
+      case BASE_TYPE_STRUCT: {
+        const auto name = WrapInNameSpace(*type.struct_def);
+        if (IsStruct(type)) {
+          auto native_type = type.struct_def->attributes.Lookup("native_type");
+          if (native_type) {
+            return "flatbuffers::UnPack(*" + val + ")";
+          } else if (invector || afield.native_inline) {
+            return "*" + val;
+          } else {
+            const auto ptype = GenTypeNativePtr(name, &afield, true);
+            return ptype + "(new " + name + "(*" + val + "))";
+          }
+        } else {
+          const auto ptype = GenTypeNativePtr(
+              NativeName(name, type.struct_def, parser_.opts), &afield, true);
+          return ptype + "(" + val + "->UnPack(_resolver))";
+        }
+      }
+      case BASE_TYPE_UNION: {
+        return GenUnionUnpackVal(
+            afield, invector ? "->Get(_i)" : "",
+            invector ? ("->GetEnum<" + type.enum_def->name + ">(_i)").c_str()
+                     : "");
+      }
+      default: {
+        return val;
+        break;
+      }
+    }
+  }
+
+  std::string GenUnpackFieldStatement(const FieldDef &field,
+                                      const FieldDef *union_field) {
+    std::string code;
+    switch (field.value.type.base_type) {
+      case BASE_TYPE_VECTOR: {
+        auto cpp_type = field.attributes.Lookup("cpp_type");
+        std::string indexing;
+        if (field.value.type.enum_def) {
+          indexing += "static_cast<" +
+                      WrapInNameSpace(*field.value.type.enum_def) + ">(";
+        }
+        indexing += "_e->Get(_i)";
+        if (field.value.type.enum_def) { indexing += ")"; }
+        if (field.value.type.element == BASE_TYPE_BOOL) { indexing += " != 0"; }
+
+        // Generate code that pushes data from _e to _o in the form:
+        //   for (uoffset_t i = 0; i < _e->size(); ++i) {
+        //     _o->field.push_back(_e->Get(_i));
+        //   }
+        auto name = Name(field);
+        if (field.value.type.element == BASE_TYPE_UTYPE) {
+          name = StripUnionType(Name(field));
+        }
+        auto access =
+            field.value.type.element == BASE_TYPE_UTYPE
+                ? ".type"
+                : (field.value.type.element == BASE_TYPE_UNION ? ".value" : "");
+        code += "{ _o->" + name + ".resize(_e->size()); ";
+        code += "for (flatbuffers::uoffset_t _i = 0;";
+        code += " _i < _e->size(); _i++) { ";
+        if (cpp_type) {
+          // Generate code that resolves the cpp pointer type, of the form:
+          //  if (resolver)
+          //    (*resolver)(&_o->field, (hash_value_t)(_e));
+          //  else
+          //    _o->field = nullptr;
+          code += "//vector resolver, " + PtrType(&field) + "\n";
+          code += "if (_resolver) ";
+          code += "(*_resolver)";
+          code += "(reinterpret_cast<void **>(&_o->" + name + "[_i]" + access +
+                  "), ";
+          code += "static_cast<flatbuffers::hash_value_t>(" + indexing + "));";
+          if (PtrType(&field) == "naked") {
+            code += " else ";
+            code += "_o->" + name + "[_i]" + access + " = nullptr";
+          } else {
+            // code += " else ";
+            // code += "_o->" + name + "[_i]" + access + " = " +
+            // GenTypeNativePtr(cpp_type->constant, &field, true) + "();";
+            code += "/* else do nothing */";
+          }
+        } else {
+          code += "_o->" + name + "[_i]" + access + " = ";
+          code += GenUnpackVal(field.value.type.VectorType(), indexing, true,
+                               field);
+        }
+        code += "; } }";
+        break;
+      }
+      case BASE_TYPE_UTYPE: {
+        FLATBUFFERS_ASSERT(union_field->value.type.base_type ==
+                           BASE_TYPE_UNION);
+        // Generate code that sets the union type, of the form:
+        //   _o->field.type = _e;
+        code += "_o->" + union_field->name + ".type = _e;";
+        break;
+      }
+      case BASE_TYPE_UNION: {
+        // Generate code that sets the union value, of the form:
+        //   _o->field.value = Union::Unpack(_e, field_type(), resolver);
+        code += "_o->" + Name(field) + ".value = ";
+        code += GenUnionUnpackVal(field, "", "");
+        code += ";";
+        break;
+      }
+      default: {
+        auto cpp_type = field.attributes.Lookup("cpp_type");
+        if (cpp_type) {
+          // Generate code that resolves the cpp pointer type, of the form:
+          //  if (resolver)
+          //    (*resolver)(&_o->field, (hash_value_t)(_e));
+          //  else
+          //    _o->field = nullptr;
+          code += "//scalar resolver, " + PtrType(&field) + " \n";
+          code += "if (_resolver) ";
+          code += "(*_resolver)";
+          code += "(reinterpret_cast<void **>(&_o->" + Name(field) + "), ";
+          code += "static_cast<flatbuffers::hash_value_t>(_e));";
+          if (PtrType(&field) == "naked") {
+            code += " else ";
+            code += "_o->" + Name(field) + " = nullptr;";
+          } else {
+            // code += " else ";
+            // code += "_o->" + Name(field) + " = " +
+            // GenTypeNativePtr(cpp_type->constant, &field, true) + "();";
+            code += "/* else do nothing */;";
+          }
+        } else {
+          // Generate code for assigning the value, of the form:
+          //  _o->field = value;
+          code += "_o->" + Name(field) + " = ";
+          code += GenUnpackVal(field.value.type, "_e", false, field) + ";";
+        }
+        break;
+      }
+    }
+    return code;
+  }
+
+  std::string GenCreateParam(const FieldDef &field) {
+    const IDLOptions &opts = parser_.opts;
+
+    std::string value = "_o->";
+    if (field.value.type.base_type == BASE_TYPE_UTYPE) {
+      value += StripUnionType(Name(field));
+      value += ".type";
+    } else {
+      value += Name(field);
+    }
+    if (field.value.type.base_type != BASE_TYPE_VECTOR &&
+        field.attributes.Lookup("cpp_type")) {
+      auto type = GenTypeBasic(field.value.type, false);
+      value =
+          "_rehasher ? "
+          "static_cast<" +
+          type + ">((*_rehasher)(" + value + GenPtrGet(field) + ")) : 0";
+    }
+
+    std::string code;
+    switch (field.value.type.base_type) {
+      // String fields are of the form:
+      //   _fbb.CreateString(_o->field)
+      // or
+      //   _fbb.CreateSharedString(_o->field)
+      case BASE_TYPE_STRING: {
+        if (!field.shared) {
+          code += "_fbb.CreateString(";
+        } else {
+          code += "_fbb.CreateSharedString(";
+        }
+        code += value;
+        code.push_back(')');
+
+        // For optional fields, check to see if there actually is any data
+        // in _o->field before attempting to access it. If there isn't,
+        // depending on set_empty_to_null either set it to 0 or an empty string.
+        if (!field.required) {
+          auto empty_value =
+              opts.set_empty_to_null ? "0" : "_fbb.CreateSharedString(\"\")";
+          code = value + ".empty() ? " + empty_value + " : " + code;
+        }
+        break;
+      }
+      // Vector fields come in several flavours, of the forms:
+      //   _fbb.CreateVector(_o->field);
+      //   _fbb.CreateVector((const utype*)_o->field.data(), _o->field.size());
+      //   _fbb.CreateVectorOfStrings(_o->field)
+      //   _fbb.CreateVectorOfStructs(_o->field)
+      //   _fbb.CreateVector<Offset<T>>(_o->field.size() [&](size_t i) {
+      //     return CreateT(_fbb, _o->Get(i), rehasher);
+      //   });
+      case BASE_TYPE_VECTOR: {
+        auto vector_type = field.value.type.VectorType();
+        switch (vector_type.base_type) {
+          case BASE_TYPE_STRING: {
+            if (NativeString(&field) == "std::string") {
+              code += "_fbb.CreateVectorOfStrings(" + value + ")";
+            } else {
+              // Use by-function serialization to emulate
+              // CreateVectorOfStrings(); this works also with non-std strings.
+              code +=
+                  "_fbb.CreateVector<flatbuffers::Offset<flatbuffers::String>>"
+                  " ";
+              code += "(" + value + ".size(), ";
+              code += "[](size_t i, _VectorArgs *__va) { ";
+              code +=
+                  "return __va->__fbb->CreateString(__va->_" + value + "[i]);";
+              code += " }, &_va )";
+            }
+            break;
+          }
+          case BASE_TYPE_STRUCT: {
+            if (IsStruct(vector_type)) {
+              auto native_type =
+                  field.value.type.struct_def->attributes.Lookup("native_type");
+              if (native_type) {
+                code += "_fbb.CreateVectorOfNativeStructs<";
+                code += WrapInNameSpace(*vector_type.struct_def) + ">";
+              } else {
+                code += "_fbb.CreateVectorOfStructs";
+              }
+              code += "(" + value + ")";
+            } else {
+              code += "_fbb.CreateVector<flatbuffers::Offset<";
+              code += WrapInNameSpace(*vector_type.struct_def) + ">> ";
+              code += "(" + value + ".size(), ";
+              code += "[](size_t i, _VectorArgs *__va) { ";
+              code += "return Create" + vector_type.struct_def->name;
+              code += "(*__va->__fbb, __va->_" + value + "[i]" +
+                      GenPtrGet(field) + ", ";
+              code += "__va->__rehasher); }, &_va )";
+            }
+            break;
+          }
+          case BASE_TYPE_BOOL: {
+            code += "_fbb.CreateVector(" + value + ")";
+            break;
+          }
+          case BASE_TYPE_UNION: {
+            code +=
+                "_fbb.CreateVector<flatbuffers::"
+                "Offset<void>>(" +
+                value +
+                ".size(), [](size_t i, _VectorArgs *__va) { "
+                "return __va->_" +
+                value + "[i].Pack(*__va->__fbb, __va->__rehasher); }, &_va)";
+            break;
+          }
+          case BASE_TYPE_UTYPE: {
+            value = StripUnionType(value);
+            code += "_fbb.CreateVector<uint8_t>(" + value +
+                    ".size(), [](size_t i, _VectorArgs *__va) { "
+                    "return static_cast<uint8_t>(__va->_" +
+                    value + "[i].type); }, &_va)";
+            break;
+          }
+          default: {
+            if (field.value.type.enum_def) {
+              // For enumerations, we need to get access to the array data for
+              // the underlying storage type (eg. uint8_t).
+              const auto basetype = GenTypeBasic(
+                  field.value.type.enum_def->underlying_type, false);
+              code += "_fbb.CreateVectorScalarCast<" + basetype +
+                      ">(flatbuffers::data(" + value + "), " + value +
+                      ".size())";
+            } else if (field.attributes.Lookup("cpp_type")) {
+              auto type = GenTypeBasic(vector_type, false);
+              code += "_fbb.CreateVector<" + type + ">(" + value + ".size(), ";
+              code += "[](size_t i, _VectorArgs *__va) { ";
+              code += "return __va->__rehasher ? ";
+              code += "static_cast<" + type + ">((*__va->__rehasher)";
+              code += "(__va->_" + value + "[i]" + GenPtrGet(field) + ")) : 0";
+              code += "; }, &_va )";
+            } else {
+              code += "_fbb.CreateVector(" + value + ")";
+            }
+            break;
+          }
+        }
+
+        // If set_empty_to_null option is enabled, for optional fields, check to
+        // see if there actually is any data in _o->field before attempting to
+        // access it.
+        if (opts.set_empty_to_null && !field.required) {
+          code = value + ".size() ? " + code + " : 0";
+        }
+        break;
+      }
+      case BASE_TYPE_UNION: {
+        // _o->field.Pack(_fbb);
+        code += value + ".Pack(_fbb)";
+        break;
+      }
+      case BASE_TYPE_STRUCT: {
+        if (IsStruct(field.value.type)) {
+          auto native_type =
+              field.value.type.struct_def->attributes.Lookup("native_type");
+          if (native_type) {
+            code += "flatbuffers::Pack(" + value + ")";
+          } else if (field.native_inline) {
+            code += "&" + value;
+          } else {
+            code += value + " ? " + value + GenPtrGet(field) + " : 0";
+          }
+        } else {
+          // _o->field ? CreateT(_fbb, _o->field.get(), _rehasher);
+          const auto type = field.value.type.struct_def->name;
+          code += value + " ? Create" + type;
+          code += "(_fbb, " + value + GenPtrGet(field) + ", _rehasher)";
+          code += " : 0";
+        }
+        break;
+      }
+      default: {
+        code += value;
+        break;
+      }
+    }
+    return code;
+  }
+
+  // Generate code for tables that needs to come after the regular definition.
+  void GenTablePost(const StructDef &struct_def) {
+    code_.SetValue("STRUCT_NAME", Name(struct_def));
+    code_.SetValue("NATIVE_NAME",
+                   NativeName(Name(struct_def), &struct_def, parser_.opts));
+
+    if (parser_.opts.generate_object_based_api) {
+      // Generate the X::UnPack() method.
+      code_ += "inline " +
+               TableUnPackSignature(struct_def, false, parser_.opts) + " {";
+      code_ += "  auto _o = new {{NATIVE_NAME}}();";
+      code_ += "  UnPackTo(_o, _resolver);";
+      code_ += "  return _o;";
+      code_ += "}";
+      code_ += "";
+
+      code_ += "inline " +
+               TableUnPackToSignature(struct_def, false, parser_.opts) + " {";
+      code_ += "  (void)_o;";
+      code_ += "  (void)_resolver;";
+
+      for (auto it = struct_def.fields.vec.begin();
+           it != struct_def.fields.vec.end(); ++it) {
+        const auto &field = **it;
+        if (field.deprecated) { continue; }
+
+        // Assign a value from |this| to |_o|.   Values from |this| are stored
+        // in a variable |_e| by calling this->field_type().  The value is then
+        // assigned to |_o| using the GenUnpackFieldStatement.
+        const bool is_union = field.value.type.base_type == BASE_TYPE_UTYPE;
+        const auto statement =
+            GenUnpackFieldStatement(field, is_union ? *(it + 1) : nullptr);
+
+        code_.SetValue("FIELD_NAME", Name(field));
+        auto prefix = "  { auto _e = {{FIELD_NAME}}(); ";
+        auto check = IsScalar(field.value.type.base_type) ? "" : "if (_e) ";
+        auto postfix = " };";
+        code_ += std::string(prefix) + check + statement + postfix;
+      }
+      code_ += "}";
+      code_ += "";
+
+      // Generate the X::Pack member function that simply calls the global
+      // CreateX function.
+      code_ += "inline " + TablePackSignature(struct_def, false, parser_.opts) +
+               " {";
+      code_ += "  return Create{{STRUCT_NAME}}(_fbb, _o, _rehasher);";
+      code_ += "}";
+      code_ += "";
+
+      // Generate a CreateX method that works with an unpacked C++ object.
+      code_ += "inline " +
+               TableCreateSignature(struct_def, false, parser_.opts) + " {";
+      code_ += "  (void)_rehasher;";
+      code_ += "  (void)_o;";
+
+      code_ +=
+          "  struct _VectorArgs "
+          "{ flatbuffers::FlatBufferBuilder *__fbb; "
+          "const " +
+          NativeName(Name(struct_def), &struct_def, parser_.opts) +
+          "* __o; "
+          "const flatbuffers::rehasher_function_t *__rehasher; } _va = { "
+          "&_fbb, _o, _rehasher}; (void)_va;";
+
+      for (auto it = struct_def.fields.vec.begin();
+           it != struct_def.fields.vec.end(); ++it) {
+        auto &field = **it;
+        if (field.deprecated) { continue; }
+        code_ += "  auto _" + Name(field) + " = " + GenCreateParam(field) + ";";
+      }
+      // Need to call "Create" with the struct namespace.
+      const auto qualified_create_name =
+          struct_def.defined_namespace->GetFullyQualifiedName("Create");
+      code_.SetValue("CREATE_NAME", TranslateNameSpace(qualified_create_name));
+
+      code_ += "  return {{CREATE_NAME}}{{STRUCT_NAME}}(";
+      code_ += "      _fbb\\";
+      for (auto it = struct_def.fields.vec.begin();
+           it != struct_def.fields.vec.end(); ++it) {
+        auto &field = **it;
+        if (field.deprecated) { continue; }
+
+        bool pass_by_address = false;
+        if (field.value.type.base_type == BASE_TYPE_STRUCT) {
+          if (IsStruct(field.value.type)) {
+            auto native_type =
+                field.value.type.struct_def->attributes.Lookup("native_type");
+            if (native_type) { pass_by_address = true; }
+          }
+        }
+
+        // Call the CreateX function using values from |_o|.
+        if (pass_by_address) {
+          code_ += ",\n      &_" + Name(field) + "\\";
+        } else {
+          code_ += ",\n      _" + Name(field) + "\\";
+        }
+      }
+      code_ += ");";
+      code_ += "}";
+      code_ += "";
+    }
+  }
+
+  static void GenPadding(
+      const FieldDef &field, std::string *code_ptr, int *id,
+      const std::function<void(int bits, std::string *code_ptr, int *id)> &f) {
+    if (field.padding) {
+      for (int i = 0; i < 4; i++) {
+        if (static_cast<int>(field.padding) & (1 << i)) {
+          f((1 << i) * 8, code_ptr, id);
+        }
+      }
+      FLATBUFFERS_ASSERT(!(field.padding & ~0xF));
+    }
+  }
+
+  static void PaddingDefinition(int bits, std::string *code_ptr, int *id) {
+    *code_ptr += "  int" + NumToString(bits) + "_t padding" +
+                 NumToString((*id)++) + "__;";
+  }
+
+  static void PaddingInitializer(int bits, std::string *code_ptr, int *id) {
+    (void)bits;
+    if (*code_ptr != "") *code_ptr += ",\n        ";
+    *code_ptr += "padding" + NumToString((*id)++) + "__(0)";
+  }
+
+  static void PaddingNoop(int bits, std::string *code_ptr, int *id) {
+    (void)bits;
+    *code_ptr += "    (void)padding" + NumToString((*id)++) + "__;";
+  }
+
+  // Generate an accessor struct with constructor for a flatbuffers struct.
+  void GenStruct(const StructDef &struct_def) {
+    // Generate an accessor struct, with private variables of the form:
+    // type name_;
+    // Generates manual padding and alignment.
+    // Variables are private because they contain little endian data on all
+    // platforms.
+    GenComment(struct_def.doc_comment);
+    code_.SetValue("ALIGN", NumToString(struct_def.minalign));
+    code_.SetValue("STRUCT_NAME", Name(struct_def));
+
+    code_ +=
+        "FLATBUFFERS_MANUALLY_ALIGNED_STRUCT({{ALIGN}}) "
+        "{{STRUCT_NAME}} FLATBUFFERS_FINAL_CLASS {";
+    code_ += " private:";
+
+    int padding_id = 0;
+    for (auto it = struct_def.fields.vec.begin();
+         it != struct_def.fields.vec.end(); ++it) {
+      const auto &field = **it;
+      const auto &field_type = field.value.type;
+      code_.SetValue("FIELD_TYPE", GenTypeGet(field_type, " ", "", " ", false));
+      code_.SetValue("FIELD_NAME", Name(field));
+      code_.SetValue("ARRAY",
+                     IsArray(field_type)
+                         ? "[" + NumToString(field_type.fixed_length) + "]"
+                         : "");
+      code_ += ("  {{FIELD_TYPE}}{{FIELD_NAME}}_{{ARRAY}};");
+
+      if (field.padding) {
+        std::string padding;
+        GenPadding(field, &padding, &padding_id, PaddingDefinition);
+        code_ += padding;
+      }
+    }
+
+    // Generate GetFullyQualifiedName
+    code_ += "";
+    code_ += " public:";
+
+    // Make TypeTable accessible via the generated struct.
+    if (parser_.opts.mini_reflect != IDLOptions::kNone) {
+      code_ +=
+          "  static const flatbuffers::TypeTable *MiniReflectTypeTable() {";
+      code_ += "    return {{STRUCT_NAME}}TypeTable();";
+      code_ += "  }";
+    }
+
+    GenFullyQualifiedNameGetter(struct_def, Name(struct_def));
+
+    // Generate a default constructor.
+    code_ += "  {{STRUCT_NAME}}() {";
+    code_ +=
+        "    memset(static_cast<void *>(this), 0, sizeof({{STRUCT_NAME}}));";
+    code_ += "  }";
+
+    // Generate a constructor that takes all fields as arguments,
+    // excluding arrays
+    std::string arg_list;
+    std::string init_list;
+    padding_id = 0;
+    auto first = struct_def.fields.vec.begin();
+    for (auto it = struct_def.fields.vec.begin();
+         it != struct_def.fields.vec.end(); ++it) {
+      const auto &field = **it;
+      if (IsArray(field.value.type)) {
+        first++;
+        continue;
+      }
+      const auto member_name = Name(field) + "_";
+      const auto arg_name = "_" + Name(field);
+      const auto arg_type =
+          GenTypeGet(field.value.type, " ", "const ", " &", true);
+
+      if (it != first) { arg_list += ", "; }
+      arg_list += arg_type;
+      arg_list += arg_name;
+      if (!IsArray(field.value.type)) {
+        if (it != first && init_list != "") { init_list += ",\n        "; }
+        init_list += member_name;
+        if (IsScalar(field.value.type.base_type)) {
+          auto type = GenUnderlyingCast(field, false, arg_name);
+          init_list += "(flatbuffers::EndianScalar(" + type + "))";
+        } else {
+          init_list += "(" + arg_name + ")";
+        }
+      }
+      if (field.padding) {
+        GenPadding(field, &init_list, &padding_id, PaddingInitializer);
+      }
+    }
+
+    if (!arg_list.empty()) {
+      code_.SetValue("ARG_LIST", arg_list);
+      code_.SetValue("INIT_LIST", init_list);
+      if (!init_list.empty()) {
+        code_ += "  {{STRUCT_NAME}}({{ARG_LIST}})";
+        code_ += "      : {{INIT_LIST}} {";
+      } else {
+        code_ += "  {{STRUCT_NAME}}({{ARG_LIST}}) {";
+      }
+      padding_id = 0;
+      for (auto it = struct_def.fields.vec.begin();
+           it != struct_def.fields.vec.end(); ++it) {
+        const auto &field = **it;
+        if (IsArray(field.value.type)) {
+          const auto &member = Name(field) + "_";
+          code_ +=
+              "    std::memset(" + member + ", 0, sizeof(" + member + "));";
+        }
+        if (field.padding) {
+          std::string padding;
+          GenPadding(field, &padding, &padding_id, PaddingNoop);
+          code_ += padding;
+        }
+      }
+      code_ += "  }";
+    }
+
+    // Generate accessor methods of the form:
+    // type name() const { return flatbuffers::EndianScalar(name_); }
+    for (auto it = struct_def.fields.vec.begin();
+         it != struct_def.fields.vec.end(); ++it) {
+      const auto &field = **it;
+
+      auto field_type = GenTypeGet(field.value.type, " ",
+                                   IsArray(field.value.type) ? "" : "const ",
+                                   IsArray(field.value.type) ? "" : " &", true);
+      auto is_scalar = IsScalar(field.value.type.base_type);
+      auto member = Name(field) + "_";
+      auto value =
+          is_scalar ? "flatbuffers::EndianScalar(" + member + ")" : member;
+
+      code_.SetValue("FIELD_NAME", Name(field));
+      code_.SetValue("FIELD_TYPE", field_type);
+      code_.SetValue("FIELD_VALUE", GenUnderlyingCast(field, true, value));
+
+      GenComment(field.doc_comment, "  ");
+
+      // Generate a const accessor function.
+      if (IsArray(field.value.type)) {
+        auto underlying = GenTypeGet(field.value.type, "", "", "", false);
+        code_ += "  const flatbuffers::Array<" + field_type + ", " +
+                 NumToString(field.value.type.fixed_length) + "> *" +
+                 "{{FIELD_NAME}}() const {";
+        code_ += "    return reinterpret_cast<const flatbuffers::Array<" +
+                 field_type + ", " +
+                 NumToString(field.value.type.fixed_length) +
+                 "> *>({{FIELD_VALUE}});";
+        code_ += "  }";
+      } else {
+        code_ += "  {{FIELD_TYPE}}{{FIELD_NAME}}() const {";
+        code_ += "    return {{FIELD_VALUE}};";
+        code_ += "  }";
+      }
+
+      // Generate a mutable accessor function.
+      if (parser_.opts.mutable_buffer) {
+        auto mut_field_type =
+            GenTypeGet(field.value.type, " ", "",
+                       IsArray(field.value.type) ? "" : " &", true);
+        code_.SetValue("FIELD_TYPE", mut_field_type);
+        if (is_scalar) {
+          code_.SetValue("ARG", GenTypeBasic(field.value.type, true));
+          code_.SetValue("FIELD_VALUE",
+                         GenUnderlyingCast(field, false, "_" + Name(field)));
+
+          code_ += "  void mutate_{{FIELD_NAME}}({{ARG}} _{{FIELD_NAME}}) {";
+          code_ +=
+              "    flatbuffers::WriteScalar(&{{FIELD_NAME}}_, "
+              "{{FIELD_VALUE}});";
+          code_ += "  }";
+        } else if (IsArray(field.value.type)) {
+          auto underlying = GenTypeGet(field.value.type, "", "", "", false);
+          code_ += "  flatbuffers::Array<" + mut_field_type + ", " +
+                   NumToString(field.value.type.fixed_length) +
+                   "> *" + "mutable_{{FIELD_NAME}}() {";
+          code_ += "    return reinterpret_cast<flatbuffers::Array<" +
+                   mut_field_type + ", " +
+                   NumToString(field.value.type.fixed_length) +
+                   "> *>({{FIELD_VALUE}});";
+          code_ += "  }";
+        } else {
+          code_ += "  {{FIELD_TYPE}}mutable_{{FIELD_NAME}}() {";
+          code_ += "    return {{FIELD_VALUE}};";
+          code_ += "  }";
+        }
+      }
+
+      // Generate a comparison function for this field if it is a key.
+      if (field.key) { GenKeyFieldMethods(field); }
+    }
+    code_.SetValue("NATIVE_NAME", Name(struct_def));
+    GenOperatorNewDelete(struct_def);
+    code_ += "};";
+
+    code_.SetValue("STRUCT_BYTE_SIZE", NumToString(struct_def.bytesize));
+    code_ += "FLATBUFFERS_STRUCT_END({{STRUCT_NAME}}, {{STRUCT_BYTE_SIZE}});";
+    if (parser_.opts.gen_compare) GenCompareOperator(struct_def, "()");
+    code_ += "";
+  }
+
+  // Set up the correct namespace. Only open a namespace if the existing one is
+  // different (closing/opening only what is necessary).
+  //
+  // The file must start and end with an empty (or null) namespace so that
+  // namespaces are properly opened and closed.
+  void SetNameSpace(const Namespace *ns) {
+    if (cur_name_space_ == ns) { return; }
+
+    // Compute the size of the longest common namespace prefix.
+    // If cur_name_space is A::B::C::D and ns is A::B::E::F::G,
+    // the common prefix is A::B:: and we have old_size = 4, new_size = 5
+    // and common_prefix_size = 2
+    size_t old_size = cur_name_space_ ? cur_name_space_->components.size() : 0;
+    size_t new_size = ns ? ns->components.size() : 0;
+
+    size_t common_prefix_size = 0;
+    while (common_prefix_size < old_size && common_prefix_size < new_size &&
+           ns->components[common_prefix_size] ==
+               cur_name_space_->components[common_prefix_size]) {
+      common_prefix_size++;
+    }
+
+    // Close cur_name_space in reverse order to reach the common prefix.
+    // In the previous example, D then C are closed.
+    for (size_t j = old_size; j > common_prefix_size; --j) {
+      code_ += "}  // namespace " + cur_name_space_->components[j - 1];
+    }
+    if (old_size != common_prefix_size) { code_ += ""; }
+
+    // open namespace parts to reach the ns namespace
+    // in the previous example, E, then F, then G are opened
+    for (auto j = common_prefix_size; j != new_size; ++j) {
+      code_ += "namespace " + ns->components[j] + " {";
+    }
+    if (new_size != common_prefix_size) { code_ += ""; }
+
+    cur_name_space_ = ns;
+  }
+
+  const TypedFloatConstantGenerator float_const_gen_;
+};
+
+}  // namespace cpp
+
+bool GenerateCPP(const Parser &parser, const std::string &path,
+                 const std::string &file_name) {
+  cpp::CppGenerator generator(parser, path, file_name);
+  return generator.generate();
+}
+
+std::string CPPMakeRule(const Parser &parser, const std::string &path,
+                        const std::string &file_name) {
+  const auto filebase =
+      flatbuffers::StripPath(flatbuffers::StripExtension(file_name));
+  const auto included_files = parser.GetIncludedFilesRecursive(file_name);
+  std::string make_rule = GeneratedFileName(path, filebase) + ": ";
+  for (auto it = included_files.begin(); it != included_files.end(); ++it) {
+    make_rule += " " + *it;
+  }
+  return make_rule;
+}
+
+}  // namespace flatbuffers