2 * Copyright 2014 Google Inc. All rights reserved.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 #ifndef FLATBUFFERS_IDL_H_
18 #define FLATBUFFERS_IDL_H_
24 #include "flatbuffers/base.h"
25 #include "flatbuffers/flatbuffers.h"
26 #include "flatbuffers/flexbuffers.h"
27 #include "flatbuffers/hash.h"
28 #include "flatbuffers/reflection.h"
30 #if !defined(FLATBUFFERS_CPP98_STL)
31 # include <functional>
32 #endif // !defined(FLATBUFFERS_CPP98_STL)
34 // This file defines the data types representing a parsed IDL (Interface
35 // Definition Language) / schema file.
37 // Limits maximum depth of nested objects.
38 // Prevents stack overflow while parse flatbuffers or json.
39 #if !defined(FLATBUFFERS_MAX_PARSING_DEPTH)
40 # define FLATBUFFERS_MAX_PARSING_DEPTH 64
43 namespace flatbuffers {
45 // The order of these matters for Is*() functions below.
46 // Additionally, Parser::ParseType assumes bool..string is a contiguous range
49 #define FLATBUFFERS_GEN_TYPES_SCALAR(TD) \
50 TD(NONE, "", uint8_t, byte, byte, byte, uint8, u8, UByte) \
51 TD(UTYPE, "", uint8_t, byte, byte, byte, uint8, u8, UByte) /* begin scalar/int */ \
52 TD(BOOL, "bool", uint8_t, boolean,bool, bool, bool, bool, Boolean) \
53 TD(CHAR, "byte", int8_t, byte, int8, sbyte, int8, i8, Byte) \
54 TD(UCHAR, "ubyte", uint8_t, byte, byte, byte, uint8, u8, UByte) \
55 TD(SHORT, "short", int16_t, short, int16, short, int16, i16, Short) \
56 TD(USHORT, "ushort", uint16_t, short, uint16, ushort, uint16, u16, UShort) \
57 TD(INT, "int", int32_t, int, int32, int, int32, i32, Int) \
58 TD(UINT, "uint", uint32_t, int, uint32, uint, uint32, u32, UInt) \
59 TD(LONG, "long", int64_t, long, int64, long, int64, i64, Long) \
60 TD(ULONG, "ulong", uint64_t, long, uint64, ulong, uint64, u64, ULong) /* end int */ \
61 TD(FLOAT, "float", float, float, float32, float, float32, f32, Float) /* begin float */ \
62 TD(DOUBLE, "double", double, double, float64, double, float64, f64, Double) /* end float/scalar */
63 #define FLATBUFFERS_GEN_TYPES_POINTER(TD) \
64 TD(STRING, "string", Offset<void>, int, int, StringOffset, int, unused, Int) \
65 TD(VECTOR, "", Offset<void>, int, int, VectorOffset, int, unused, Int) \
66 TD(STRUCT, "", Offset<void>, int, int, int, int, unused, Int) \
67 TD(UNION, "", Offset<void>, int, int, int, int, unused, Int)
68 #define FLATBUFFERS_GEN_TYPE_ARRAY(TD) \
69 TD(ARRAY, "", int, int, int, int, int, unused, Int)
72 // - FlatBuffers schema type.
81 // using these macros, we can now write code dealing with types just once, e.g.
85 #define FLATBUFFERS_TD(ENUM, IDLTYPE, CTYPE, JTYPE, GTYPE, NTYPE, PTYPE, \
87 case BASE_TYPE_ ## ENUM: \
88 // do something specific to CTYPE here
89 FLATBUFFERS_GEN_TYPES(FLATBUFFERS_TD)
94 #define FLATBUFFERS_GEN_TYPES(TD) \
95 FLATBUFFERS_GEN_TYPES_SCALAR(TD) \
96 FLATBUFFERS_GEN_TYPES_POINTER(TD) \
97 FLATBUFFERS_GEN_TYPE_ARRAY(TD)
99 // Create an enum for all the types above.
101 __extension__ // Stop GCC complaining about trailing comma with -Wpendantic.
104 #define FLATBUFFERS_TD(ENUM, IDLTYPE, CTYPE, JTYPE, GTYPE, NTYPE, PTYPE, \
107 FLATBUFFERS_GEN_TYPES(FLATBUFFERS_TD)
108 #undef FLATBUFFERS_TD
111 #define FLATBUFFERS_TD(ENUM, IDLTYPE, CTYPE, JTYPE, GTYPE, NTYPE, PTYPE, \
113 static_assert(sizeof(CTYPE) <= sizeof(largest_scalar_t), \
114 "define largest_scalar_t as " #CTYPE);
115 FLATBUFFERS_GEN_TYPES(FLATBUFFERS_TD)
116 #undef FLATBUFFERS_TD
118 inline bool IsScalar (BaseType t) { return t >= BASE_TYPE_UTYPE &&
119 t <= BASE_TYPE_DOUBLE; }
120 inline bool IsInteger(BaseType t) { return t >= BASE_TYPE_UTYPE &&
121 t <= BASE_TYPE_ULONG; }
122 inline bool IsFloat (BaseType t) { return t == BASE_TYPE_FLOAT ||
123 t == BASE_TYPE_DOUBLE; }
124 inline bool IsLong (BaseType t) { return t == BASE_TYPE_LONG ||
125 t == BASE_TYPE_ULONG; }
126 inline bool IsBool (BaseType t) { return t == BASE_TYPE_BOOL; }
127 inline bool IsOneByte(BaseType t) { return t >= BASE_TYPE_UTYPE &&
128 t <= BASE_TYPE_UCHAR; }
130 inline bool IsUnsigned(BaseType t) {
131 return (t == BASE_TYPE_UTYPE) || (t == BASE_TYPE_UCHAR) ||
132 (t == BASE_TYPE_USHORT) || (t == BASE_TYPE_UINT) ||
133 (t == BASE_TYPE_ULONG);
138 extern const char *const kTypeNames[];
139 extern const char kTypeSizes[];
141 inline size_t SizeOf(BaseType t) { return kTypeSizes[t]; }
147 // Represents any type in the IDL, which is a combination of the BaseType
148 // and additional information for vectors/structs_.
150 explicit Type(BaseType _base_type = BASE_TYPE_NONE, StructDef *_sd = nullptr,
151 EnumDef *_ed = nullptr, uint16_t _fixed_length = 0)
152 : base_type(_base_type),
153 element(BASE_TYPE_NONE),
156 fixed_length(_fixed_length) {}
158 bool operator==(const Type &o) {
159 return base_type == o.base_type && element == o.element &&
160 struct_def == o.struct_def && enum_def == o.enum_def;
163 Type VectorType() const {
164 return Type(element, struct_def, enum_def, fixed_length);
167 Offset<reflection::Type> Serialize(FlatBufferBuilder *builder) const;
169 bool Deserialize(const Parser &parser, const reflection::Type *type);
172 BaseType element; // only set if t == BASE_TYPE_VECTOR
173 StructDef *struct_def; // only set if t or element == BASE_TYPE_STRUCT
174 EnumDef *enum_def; // set if t == BASE_TYPE_UNION / BASE_TYPE_UTYPE,
175 // or for an integral type derived from an enum.
176 uint16_t fixed_length; // only set if t == BASE_TYPE_ARRAY
179 // Represents a parsed scalar value, it's type, and field offset.
183 offset(static_cast<voffset_t>(~(static_cast<voffset_t>(0U)))) {}
185 std::string constant;
189 // Helper class that retains the original order of a set of identifiers and
190 // also provides quick lookup.
191 template<typename T> class SymbolTable {
194 for (auto it = vec.begin(); it != vec.end(); ++it) { delete *it; }
197 bool Add(const std::string &name, T *e) {
198 vector_emplace_back(&vec, e);
199 auto it = dict.find(name);
200 if (it != dict.end()) return true;
205 void Move(const std::string &oldname, const std::string &newname) {
206 auto it = dict.find(oldname);
207 if (it != dict.end()) {
208 auto obj = it->second;
212 FLATBUFFERS_ASSERT(false);
216 T *Lookup(const std::string &name) const {
217 auto it = dict.find(name);
218 return it == dict.end() ? nullptr : it->second;
222 std::map<std::string, T *> dict; // quick lookup
223 std::vector<T *> vec; // Used to iterate in order of insertion
226 // A name space, as set in the schema.
228 Namespace() : from_table(0) {}
230 // Given a (potentally unqualified) name, return the "fully qualified" name
231 // which has a full namespaced descriptor.
232 // With max_components you can request less than the number of components
233 // the current namespace has.
234 std::string GetFullyQualifiedName(const std::string &name,
235 size_t max_components = 1000) const;
237 std::vector<std::string> components;
238 size_t from_table; // Part of the namespace corresponds to a message/table.
241 inline bool operator<(const Namespace &a, const Namespace &b) {
242 size_t min_size = std::min(a.components.size(), b.components.size());
243 for (size_t i = 0; i < min_size; ++i) {
244 if (a.components[i] != b.components[i])
245 return a.components[i] < b.components[i];
247 return a.components.size() < b.components.size();
250 // Base class for all definition types (fields, structs_, enums_).
254 defined_namespace(nullptr),
255 serialized_location(0),
260 flatbuffers::Vector<flatbuffers::Offset<reflection::KeyValue>>>
261 SerializeAttributes(FlatBufferBuilder *builder, const Parser &parser) const;
263 bool DeserializeAttributes(Parser &parser,
264 const Vector<Offset<reflection::KeyValue>> *attrs);
268 std::vector<std::string> doc_comment;
269 SymbolTable<Value> attributes;
270 bool generated; // did we already output code for this definition?
271 Namespace *defined_namespace; // Where it was defined.
273 // For use with Serialize()
274 uoffset_t serialized_location;
275 int index; // Inside the vector it is stored.
279 struct FieldDef : public Definition {
285 native_inline(false),
287 nested_flatbuffer(NULL),
290 Offset<reflection::Field> Serialize(FlatBufferBuilder *builder, uint16_t id,
291 const Parser &parser) const;
293 bool Deserialize(Parser &parser, const reflection::Field *field);
296 bool deprecated; // Field is allowed to be present in old data, but can't be.
297 // written in new data nor accessed in new code.
298 bool required; // Field must always be present.
299 bool key; // Field functions as a key for creating sorted vectors.
300 bool shared; // Field will be using string pooling (i.e. CreateSharedString)
301 // as default serialization behavior if field is a string.
302 bool native_inline; // Field will be defined inline (instead of as a pointer)
303 // for native tables if field is a struct.
304 bool flexbuffer; // This field contains FlexBuffer data.
305 StructDef *nested_flatbuffer; // This field contains nested FlatBuffer data.
306 size_t padding; // Bytes to always pad after this field.
309 struct StructDef : public Definition {
318 void PadLastField(size_t min_align) {
319 auto padding = PaddingBytes(bytesize, min_align);
321 if (fields.vec.size()) fields.vec.back()->padding = padding;
324 Offset<reflection::Object> Serialize(FlatBufferBuilder *builder,
325 const Parser &parser) const;
327 bool Deserialize(Parser &parser, const reflection::Object *object);
329 SymbolTable<FieldDef> fields;
331 bool fixed; // If it's struct, not a table.
332 bool predecl; // If it's used before it was defined.
333 bool sortbysize; // Whether fields come in the declaration or size order.
334 bool has_key; // It has a key field.
335 size_t minalign; // What the whole object needs to be aligned to.
336 size_t bytesize; // Size if fixed.
338 flatbuffers::unique_ptr<std::string> original_location;
342 struct EnumValBuilder;
345 Offset<reflection::EnumVal> Serialize(FlatBufferBuilder *builder,
346 const Parser &parser) const;
348 bool Deserialize(const Parser &parser, const reflection::EnumVal *val);
350 uint64_t GetAsUInt64() const { return static_cast<uint64_t>(value); }
351 int64_t GetAsInt64() const { return value; }
352 bool IsZero() const { return 0 == value; }
353 bool IsNonZero() const { return !IsZero(); }
356 std::vector<std::string> doc_comment;
361 friend EnumValBuilder;
362 friend bool operator==(const EnumVal &lhs, const EnumVal &rhs);
364 EnumVal(const std::string &_name, int64_t _val) : name(_name), value(_val) {}
365 EnumVal() : value(0) {}
370 struct EnumDef : public Definition {
371 EnumDef() : is_union(false), uses_multiple_type_instances(false) {}
373 Offset<reflection::Enum> Serialize(FlatBufferBuilder *builder,
374 const Parser &parser) const;
376 bool Deserialize(Parser &parser, const reflection::Enum *values);
378 template<typename T> void ChangeEnumValue(EnumVal *ev, T new_val);
380 void RemoveDuplicates();
382 std::string AllFlags() const;
383 const EnumVal *MinValue() const;
384 const EnumVal *MaxValue() const;
385 // Returns the number of integer steps from v1 to v2.
386 uint64_t Distance(const EnumVal *v1, const EnumVal *v2) const;
387 // Returns the number of integer steps from Min to Max.
388 uint64_t Distance() const { return Distance(MinValue(), MaxValue()); }
390 EnumVal *ReverseLookup(int64_t enum_idx,
391 bool skip_union_default = false) const;
392 EnumVal *FindByValue(const std::string &constant) const;
394 std::string ToString(const EnumVal &ev) const {
395 return IsUInt64() ? NumToString(ev.GetAsUInt64())
396 : NumToString(ev.GetAsInt64());
399 size_t size() const { return vals.vec.size(); }
401 const std::vector<EnumVal *> &Vals() const {
402 FLATBUFFERS_ASSERT(false == vals.vec.empty());
406 const EnumVal *Lookup(const std::string &enum_name) const {
407 return vals.Lookup(enum_name);
411 // Type is a union which uses type aliases where at least one type is
412 // available under two different names.
413 bool uses_multiple_type_instances;
414 Type underlying_type;
417 bool IsUInt64() const {
418 return (BASE_TYPE_ULONG == underlying_type.base_type);
421 friend EnumValBuilder;
422 SymbolTable<EnumVal> vals;
425 inline bool IsStruct(const Type &type) {
426 return type.base_type == BASE_TYPE_STRUCT && type.struct_def->fixed;
429 inline bool IsUnion(const Type &type) {
430 return type.enum_def != nullptr && type.enum_def->is_union;
433 inline bool IsVector(const Type &type) {
434 return type.base_type == BASE_TYPE_VECTOR;
437 inline bool IsArray(const Type &type) {
438 return type.base_type == BASE_TYPE_ARRAY;
441 inline bool IsSeries(const Type &type) {
442 return IsVector(type) || IsArray(type);
445 inline bool IsEnum(const Type &type) {
446 return type.enum_def != nullptr && IsInteger(type.base_type);
449 inline size_t InlineSize(const Type &type) {
450 return IsStruct(type)
451 ? type.struct_def->bytesize
453 ? InlineSize(type.VectorType()) * type.fixed_length
454 : SizeOf(type.base_type));
457 inline size_t InlineAlignment(const Type &type) {
458 if (IsStruct(type)) {
459 return type.struct_def->minalign;
460 } else if (IsArray(type)) {
461 return IsStruct(type.VectorType()) ? type.struct_def->minalign
462 : SizeOf(type.element);
464 return SizeOf(type.base_type);
467 inline bool operator==(const EnumVal &lhs, const EnumVal &rhs) {
468 return lhs.value == rhs.value;
470 inline bool operator!=(const EnumVal &lhs, const EnumVal &rhs) {
471 return !(lhs == rhs);
474 inline bool EqualByName(const Type &a, const Type &b) {
475 return a.base_type == b.base_type && a.element == b.element &&
476 (a.struct_def == b.struct_def ||
477 a.struct_def->name == b.struct_def->name) &&
478 (a.enum_def == b.enum_def || a.enum_def->name == b.enum_def->name);
481 struct RPCCall : public Definition {
482 Offset<reflection::RPCCall> Serialize(FlatBufferBuilder *builder,
483 const Parser &parser) const;
485 bool Deserialize(Parser &parser, const reflection::RPCCall *call);
487 StructDef *request, *response;
490 struct ServiceDef : public Definition {
491 Offset<reflection::Service> Serialize(FlatBufferBuilder *builder,
492 const Parser &parser) const;
493 bool Deserialize(Parser &parser, const reflection::Service *service);
495 SymbolTable<RPCCall> calls;
498 // Container of options that may apply to any of the source/text generators.
500 // Use flexbuffers instead for binary and text generation
501 bool use_flexbuffers;
503 bool skip_js_exports;
504 bool use_goog_js_export_format;
505 bool use_ES6_js_export_format;
506 bool output_default_scalars_in_json;
508 bool output_enum_identifiers;
511 bool include_dependence_headers;
515 bool proto_oneof_union;
517 bool skip_unexpected_fields_in_json;
518 bool generate_name_strings;
519 bool generate_object_based_api;
521 std::string cpp_object_api_pointer_type;
522 std::string cpp_object_api_string_type;
523 bool cpp_object_api_string_flexible_constructor;
525 bool java_checkerframework;
527 std::string object_prefix;
528 std::string object_suffix;
529 bool union_value_namespacing;
532 std::string include_prefix;
533 bool keep_include_path;
534 bool binary_schema_comments;
535 bool binary_schema_builtins;
536 bool skip_flatbuffers_import;
537 std::string go_import;
538 std::string go_namespace;
539 bool reexport_ts_modules;
540 bool js_ts_short_names;
541 bool protobuf_ascii_alike;
543 std::string root_type;
545 bool java_primitive_has_method;
546 std::vector<std::string> cpp_includes;
548 // Possible options for the more general generator below.
560 kJsonSchema = 1 << 10,
571 enum MiniReflect { kNone, kTypes, kTypesAndNames };
573 MiniReflect mini_reflect;
575 // The corresponding language bit will be set if a language is included
576 // for code generation.
577 unsigned long lang_to_generate;
579 // If set (default behavior), empty string and vector fields will be set to
580 // nullptr to make the flatbuffer more compact.
581 bool set_empty_to_null;
584 : use_flexbuffers(false),
586 skip_js_exports(false),
587 use_goog_js_export_format(false),
588 use_ES6_js_export_format(false),
589 output_default_scalars_in_json(false),
591 output_enum_identifiers(true),
592 prefixed_enums(true),
594 include_dependence_headers(true),
595 mutable_buffer(false),
598 proto_oneof_union(false),
600 skip_unexpected_fields_in_json(false),
601 generate_name_strings(false),
602 generate_object_based_api(false),
604 cpp_object_api_pointer_type("std::unique_ptr"),
605 cpp_object_api_string_flexible_constructor(false),
607 java_checkerframework(false),
608 gen_generated(false),
610 union_value_namespacing(true),
611 allow_non_utf8(false),
613 keep_include_path(false),
614 binary_schema_comments(false),
615 binary_schema_builtins(false),
616 skip_flatbuffers_import(false),
617 reexport_ts_modules(true),
618 js_ts_short_names(false),
619 protobuf_ascii_alike(false),
620 size_prefixed(false),
621 force_defaults(false),
622 java_primitive_has_method(false),
623 lang(IDLOptions::kJava),
624 mini_reflect(IDLOptions::kNone),
626 set_empty_to_null(true) {}
629 // This encapsulates where the parser is in the current source file.
633 line_start_(nullptr),
636 attr_is_trivial_ascii_string_(true) {}
639 void ResetState(const char *source) {
646 line_start_ = cursor_;
650 int64_t CursorPosition() const {
651 FLATBUFFERS_ASSERT(cursor_ && line_start_ && cursor_ >= line_start_);
652 return static_cast<int64_t>(cursor_ - line_start_);
656 const char *line_start_;
657 int line_; // the current line being parsed
660 // Flag: text in attribute_ is true ASCII string without escape
661 // sequences. Only printable ASCII (without [\t\r\n]).
662 // Used for number-in-string (and base64 string in future).
663 bool attr_is_trivial_ascii_string_;
664 std::string attribute_;
665 std::vector<std::string> doc_comment_;
668 // A way to make error propagation less error prone by requiring values to be
670 // Once you create a value of this type you must either:
671 // - Call Check() on it.
672 // - Copy or assign it to another value.
673 // Failure to do so leads to an assert.
674 // This guarantees that this as return value cannot be ignored.
677 explicit CheckedError(bool error)
678 : is_error_(error), has_been_checked_(false) {}
680 CheckedError &operator=(const CheckedError &other) {
681 is_error_ = other.is_error_;
682 has_been_checked_ = false;
683 other.has_been_checked_ = true;
687 CheckedError(const CheckedError &other) {
688 *this = other; // Use assignment operator.
691 ~CheckedError() { FLATBUFFERS_ASSERT(has_been_checked_); }
694 has_been_checked_ = true;
700 mutable bool has_been_checked_;
703 // Additionally, in GCC we can get these errors statically, for additional
707 #define FLATBUFFERS_CHECKED_ERROR CheckedError \
708 __attribute__((warn_unused_result))
710 #define FLATBUFFERS_CHECKED_ERROR CheckedError
714 class Parser : public ParserState {
716 explicit Parser(const IDLOptions &options = IDLOptions())
717 : current_namespace_(nullptr),
718 empty_namespace_(nullptr),
719 flex_builder_(256, flexbuffers::BUILDER_FLAG_SHARE_ALL),
720 root_struct_def_(nullptr),
722 uses_flexbuffers_(false),
724 anonymous_counter(0),
725 recurse_protection_counter(0) {
726 if (opts.force_defaults) { builder_.ForceDefaults(true); }
727 // Start out with the empty namespace being current.
728 empty_namespace_ = new Namespace();
729 namespaces_.push_back(empty_namespace_);
730 current_namespace_ = empty_namespace_;
731 known_attributes_["deprecated"] = true;
732 known_attributes_["required"] = true;
733 known_attributes_["key"] = true;
734 known_attributes_["shared"] = true;
735 known_attributes_["hash"] = true;
736 known_attributes_["id"] = true;
737 known_attributes_["force_align"] = true;
738 known_attributes_["bit_flags"] = true;
739 known_attributes_["original_order"] = true;
740 known_attributes_["nested_flatbuffer"] = true;
741 known_attributes_["csharp_partial"] = true;
742 known_attributes_["streaming"] = true;
743 known_attributes_["idempotent"] = true;
744 known_attributes_["cpp_type"] = true;
745 known_attributes_["cpp_ptr_type"] = true;
746 known_attributes_["cpp_ptr_type_get"] = true;
747 known_attributes_["cpp_str_type"] = true;
748 known_attributes_["cpp_str_flex_ctor"] = true;
749 known_attributes_["native_inline"] = true;
750 known_attributes_["native_custom_alloc"] = true;
751 known_attributes_["native_type"] = true;
752 known_attributes_["native_default"] = true;
753 known_attributes_["flexbuffer"] = true;
754 known_attributes_["private"] = true;
758 for (auto it = namespaces_.begin(); it != namespaces_.end(); ++it) {
763 // Parse the string containing either schema or JSON data, which will
764 // populate the SymbolTable's or the FlatBufferBuilder above.
765 // include_paths is used to resolve any include statements, and typically
766 // should at least include the project path (where you loaded source_ from).
767 // include_paths must be nullptr terminated if specified.
768 // If include_paths is nullptr, it will attempt to load from the current
770 // If the source was loaded from a file and isn't an include file,
771 // supply its name in source_filename.
772 // All paths specified in this call must be in posix format, if you accept
773 // paths from user input, please call PosixPath on them first.
774 bool Parse(const char *_source, const char **include_paths = nullptr,
775 const char *source_filename = nullptr);
777 // Set the root type. May override the one set in the schema.
778 bool SetRootType(const char *name);
780 // Mark all definitions as already having code generated.
781 void MarkGenerated();
783 // Get the files recursively included by the given file. The returned
784 // container will have at least the given file.
785 std::set<std::string> GetIncludedFilesRecursive(
786 const std::string &file_name) const;
788 // Fills builder_ with a binary version of the schema parsed.
789 // See reflection/reflection.fbs
792 // Deserialize a schema buffer
793 bool Deserialize(const uint8_t *buf, const size_t size);
795 // Fills internal structure as if the schema passed had been loaded by parsing
796 // with Parse except that included filenames will not be populated.
797 bool Deserialize(const reflection::Schema *schema);
799 Type *DeserializeType(const reflection::Type *type);
801 // Checks that the schema represented by this parser is a safe evolution
802 // of the schema provided. Returns non-empty error on any problems.
803 std::string ConformTo(const Parser &base);
805 // Similar to Parse(), but now only accepts JSON to be parsed into a
807 bool ParseFlexBuffer(const char *source, const char *source_filename,
808 flexbuffers::Builder *builder);
810 StructDef *LookupStruct(const std::string &id) const;
812 std::string UnqualifiedName(const std::string &fullQualifiedName);
814 FLATBUFFERS_CHECKED_ERROR Error(const std::string &msg);
817 void Message(const std::string &msg);
818 void Warning(const std::string &msg);
819 FLATBUFFERS_CHECKED_ERROR ParseHexNum(int nibbles, uint64_t *val);
820 FLATBUFFERS_CHECKED_ERROR Next();
821 FLATBUFFERS_CHECKED_ERROR SkipByteOrderMark();
822 bool Is(int t) const;
823 bool IsIdent(const char *id) const;
824 FLATBUFFERS_CHECKED_ERROR Expect(int t);
825 std::string TokenToStringId(int t) const;
826 EnumDef *LookupEnum(const std::string &id);
827 FLATBUFFERS_CHECKED_ERROR ParseNamespacing(std::string *id,
829 FLATBUFFERS_CHECKED_ERROR ParseTypeIdent(Type &type);
830 FLATBUFFERS_CHECKED_ERROR ParseType(Type &type);
831 FLATBUFFERS_CHECKED_ERROR AddField(StructDef &struct_def,
832 const std::string &name, const Type &type,
834 FLATBUFFERS_CHECKED_ERROR ParseField(StructDef &struct_def);
835 FLATBUFFERS_CHECKED_ERROR ParseString(Value &val);
836 FLATBUFFERS_CHECKED_ERROR ParseComma();
837 FLATBUFFERS_CHECKED_ERROR ParseAnyValue(Value &val, FieldDef *field,
838 size_t parent_fieldn,
839 const StructDef *parent_struct_def,
841 bool inside_vector = false);
843 FLATBUFFERS_CHECKED_ERROR ParseTableDelimiters(size_t &fieldn,
844 const StructDef *struct_def,
846 FLATBUFFERS_CHECKED_ERROR ParseTable(const StructDef &struct_def,
847 std::string *value, uoffset_t *ovalue);
848 void SerializeStruct(const StructDef &struct_def, const Value &val);
849 void SerializeStruct(FlatBufferBuilder &builder, const StructDef &struct_def,
852 FLATBUFFERS_CHECKED_ERROR ParseVectorDelimiters(uoffset_t &count, F body);
853 FLATBUFFERS_CHECKED_ERROR ParseVector(const Type &type, uoffset_t *ovalue,
854 FieldDef *field, size_t fieldn);
855 FLATBUFFERS_CHECKED_ERROR ParseArray(Value &array);
856 FLATBUFFERS_CHECKED_ERROR ParseNestedFlatbuffer(
857 Value &val, FieldDef *field, size_t fieldn,
858 const StructDef *parent_struct_def);
859 FLATBUFFERS_CHECKED_ERROR ParseMetaData(SymbolTable<Value> *attributes);
860 FLATBUFFERS_CHECKED_ERROR TryTypedValue(const std::string *name, int dtoken,
861 bool check, Value &e, BaseType req,
863 FLATBUFFERS_CHECKED_ERROR ParseHash(Value &e, FieldDef *field);
864 FLATBUFFERS_CHECKED_ERROR TokenError();
865 FLATBUFFERS_CHECKED_ERROR ParseSingleValue(const std::string *name, Value &e,
867 FLATBUFFERS_CHECKED_ERROR ParseEnumFromString(const Type &type,
868 std::string *result);
869 StructDef *LookupCreateStruct(const std::string &name,
870 bool create_if_new = true,
871 bool definition = false);
872 FLATBUFFERS_CHECKED_ERROR ParseEnum(bool is_union, EnumDef **dest);
873 FLATBUFFERS_CHECKED_ERROR ParseNamespace();
874 FLATBUFFERS_CHECKED_ERROR StartStruct(const std::string &name,
876 FLATBUFFERS_CHECKED_ERROR StartEnum(const std::string &name, bool is_union,
878 FLATBUFFERS_CHECKED_ERROR ParseDecl();
879 FLATBUFFERS_CHECKED_ERROR ParseService();
880 FLATBUFFERS_CHECKED_ERROR ParseProtoFields(StructDef *struct_def,
881 bool isextend, bool inside_oneof);
882 FLATBUFFERS_CHECKED_ERROR ParseProtoOption();
883 FLATBUFFERS_CHECKED_ERROR ParseProtoKey();
884 FLATBUFFERS_CHECKED_ERROR ParseProtoDecl();
885 FLATBUFFERS_CHECKED_ERROR ParseProtoCurliesOrIdent();
886 FLATBUFFERS_CHECKED_ERROR ParseTypeFromProtoType(Type *type);
887 FLATBUFFERS_CHECKED_ERROR SkipAnyJsonValue();
888 FLATBUFFERS_CHECKED_ERROR ParseFlexBufferValue(flexbuffers::Builder *builder);
889 FLATBUFFERS_CHECKED_ERROR StartParseFile(const char *source,
890 const char *source_filename);
891 FLATBUFFERS_CHECKED_ERROR ParseRoot(const char *_source,
892 const char **include_paths,
893 const char *source_filename);
894 FLATBUFFERS_CHECKED_ERROR DoParse(const char *_source,
895 const char **include_paths,
896 const char *source_filename,
897 const char *include_filename);
898 FLATBUFFERS_CHECKED_ERROR CheckClash(std::vector<FieldDef *> &fields,
899 StructDef *struct_def,
900 const char *suffix, BaseType baseType);
902 bool SupportsAdvancedUnionFeatures() const;
903 bool SupportsAdvancedArrayFeatures() const;
904 Namespace *UniqueNamespace(Namespace *ns);
906 FLATBUFFERS_CHECKED_ERROR RecurseError();
907 template<typename F> CheckedError Recurse(F f);
910 SymbolTable<Type> types_;
911 SymbolTable<StructDef> structs_;
912 SymbolTable<EnumDef> enums_;
913 SymbolTable<ServiceDef> services_;
914 std::vector<Namespace *> namespaces_;
915 Namespace *current_namespace_;
916 Namespace *empty_namespace_;
917 std::string error_; // User readable error_ if Parse() == false
919 FlatBufferBuilder builder_; // any data contained in the file
920 flexbuffers::Builder flex_builder_;
921 flexbuffers::Reference flex_root_;
922 StructDef *root_struct_def_;
923 std::string file_identifier_;
924 std::string file_extension_;
926 std::map<std::string, std::string> included_files_;
927 std::map<std::string, std::set<std::string>> files_included_per_file_;
928 std::vector<std::string> native_included_files_;
930 std::map<std::string, bool> known_attributes_;
933 bool uses_flexbuffers_;
938 std::string file_being_parsed_;
940 std::vector<std::pair<Value, FieldDef *>> field_stack_;
942 int anonymous_counter;
943 int recurse_protection_counter;
946 // Utility functions for multiple generators:
948 extern std::string MakeCamel(const std::string &in, bool first = true);
950 extern std::string MakeScreamingCamel(const std::string &in);
952 // Generate text (JSON) from a given FlatBuffer, and a given Parser
953 // object that has been populated with the corresponding schema.
954 // If ident_step is 0, no indentation will be generated. Additionally,
955 // if it is less than 0, no linefeeds will be generated either.
956 // See idl_gen_text.cpp.
957 // strict_json adds "quotes" around field names if true.
958 // If the flatbuffer cannot be encoded in JSON (e.g., it contains non-UTF-8
959 // byte arrays in String values), returns false.
960 extern bool GenerateTextFromTable(const Parser &parser, const void *table,
961 const std::string &tablename,
963 extern bool GenerateText(const Parser &parser, const void *flatbuffer,
965 extern bool GenerateTextFile(const Parser &parser, const std::string &path,
966 const std::string &file_name);
968 // Generate binary files from a given FlatBuffer, and a given Parser
969 // object that has been populated with the corresponding schema.
970 // See idl_gen_general.cpp.
971 extern bool GenerateBinary(const Parser &parser, const std::string &path,
972 const std::string &file_name);
974 // Generate a C++ header from the definitions in the Parser object.
976 extern bool GenerateCPP(const Parser &parser, const std::string &path,
977 const std::string &file_name);
979 extern bool GenerateDart(const Parser &parser, const std::string &path,
980 const std::string &file_name);
982 // Generate JavaScript or TypeScript code from the definitions in the Parser
983 // object. See idl_gen_js.
984 extern bool GenerateJSTS(const Parser &parser, const std::string &path,
985 const std::string &file_name);
987 // Generate Go files from the definitions in the Parser object.
988 // See idl_gen_go.cpp.
989 extern bool GenerateGo(const Parser &parser, const std::string &path,
990 const std::string &file_name);
992 // Generate Php code from the definitions in the Parser object.
994 extern bool GeneratePhp(const Parser &parser, const std::string &path,
995 const std::string &file_name);
997 // Generate Python files from the definitions in the Parser object.
998 // See idl_gen_python.cpp.
999 extern bool GeneratePython(const Parser &parser, const std::string &path,
1000 const std::string &file_name);
1002 // Generate Lobster files from the definitions in the Parser object.
1003 // See idl_gen_lobster.cpp.
1004 extern bool GenerateLobster(const Parser &parser, const std::string &path,
1005 const std::string &file_name);
1007 // Generate Lua files from the definitions in the Parser object.
1008 // See idl_gen_lua.cpp.
1009 extern bool GenerateLua(const Parser &parser, const std::string &path,
1010 const std::string &file_name);
1012 // Generate Rust files from the definitions in the Parser object.
1013 // See idl_gen_rust.cpp.
1014 extern bool GenerateRust(const Parser &parser, const std::string &path,
1015 const std::string &file_name);
1017 // Generate Json schema file
1018 // See idl_gen_json_schema.cpp.
1019 extern bool GenerateJsonSchema(const Parser &parser, const std::string &path,
1020 const std::string &file_name);
1022 extern bool GenerateKotlin(const Parser &parser, const std::string &path,
1023 const std::string &file_name);
1025 // Generate Java/C#/.. files from the definitions in the Parser object.
1026 // See idl_gen_general.cpp.
1027 extern bool GenerateGeneral(const Parser &parser, const std::string &path,
1028 const std::string &file_name);
1030 // Generate a schema file from the internal representation, useful after
1031 // parsing a .proto schema.
1032 extern std::string GenerateFBS(const Parser &parser,
1033 const std::string &file_name);
1034 extern bool GenerateFBS(const Parser &parser, const std::string &path,
1035 const std::string &file_name);
1037 // Generate a make rule for the generated JavaScript or TypeScript code.
1038 // See idl_gen_js.cpp.
1039 extern std::string JSTSMakeRule(const Parser &parser, const std::string &path,
1040 const std::string &file_name);
1042 // Generate a make rule for the generated C++ header.
1043 // See idl_gen_cpp.cpp.
1044 extern std::string CPPMakeRule(const Parser &parser, const std::string &path,
1045 const std::string &file_name);
1047 // Generate a make rule for the generated Dart code
1048 // see idl_gen_dart.cpp
1049 extern std::string DartMakeRule(const Parser &parser, const std::string &path,
1050 const std::string &file_name);
1052 // Generate a make rule for the generated Rust code.
1053 // See idl_gen_rust.cpp.
1054 extern std::string RustMakeRule(const Parser &parser, const std::string &path,
1055 const std::string &file_name);
1057 // Generate a make rule for the generated Java/C#/... files.
1058 // See idl_gen_general.cpp.
1059 extern std::string GeneralMakeRule(const Parser &parser,
1060 const std::string &path,
1061 const std::string &file_name);
1063 // Generate a make rule for the generated text (JSON) files.
1064 // See idl_gen_text.cpp.
1065 extern std::string TextMakeRule(const Parser &parser, const std::string &path,
1066 const std::string &file_names);
1068 // Generate a make rule for the generated binary files.
1069 // See idl_gen_general.cpp.
1070 extern std::string BinaryMakeRule(const Parser &parser, const std::string &path,
1071 const std::string &file_name);
1073 // Generate GRPC Cpp interfaces.
1074 // See idl_gen_grpc.cpp.
1075 bool GenerateCppGRPC(const Parser &parser, const std::string &path,
1076 const std::string &file_name);
1078 // Generate GRPC Go interfaces.
1079 // See idl_gen_grpc.cpp.
1080 bool GenerateGoGRPC(const Parser &parser, const std::string &path,
1081 const std::string &file_name);
1083 // Generate GRPC Java classes.
1084 // See idl_gen_grpc.cpp
1085 bool GenerateJavaGRPC(const Parser &parser, const std::string &path,
1086 const std::string &file_name);
1088 } // namespace flatbuffers
1090 #endif // FLATBUFFERS_IDL_H_