Squashed 'third_party/flatbuffers/' content from commit acc9990ab
Change-Id: I48550d40d78fea996ebe74e9723a5d1f910de491
git-subtree-dir: third_party/flatbuffers
git-subtree-split: acc9990abd2206491480291b0f85f925110102ea
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