proto/google/protobuf/descriptor.proto
// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc. All rights reserved.
// https://developers.google.com/protocol-buffers/
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// Author: kenton@google.com (Kenton Varda)
// Based on original Protocol Buffers design by
// Sanjay Ghemawat, Jeff Dean, and others.
//
// The messages in this file describe the definitions found in .proto files.
// A valid .proto file can be translated directly to a FileDescriptorProto
// without any other information (e.g. without reading its imports).
syntax = "proto2";
package google.protobuf;
option go_package = "google.golang.org/protobuf/types/descriptorpb";
option java_package = "com.google.protobuf";
option java_outer_classname = "DescriptorProtos";
option csharp_namespace = "Google.Protobuf.Reflection";
option objc_class_prefix = "GPB";
option cc_enable_arenas = true;
// descriptor.proto must be optimized for speed because reflection-based
// algorithms don't work during bootstrapping.
option optimize_for = SPEED;
// The protocol compiler can output a FileDescriptorSet containing the .proto
// files it parses.
message FileDescriptorSet {
repeated FileDescriptorProto file = 1;
}
// The full set of known editions.
enum Edition {
// A placeholder for an unknown edition value.
EDITION_UNKNOWN = 0;
// Legacy syntax "editions". These pre-date editions, but behave much like
// distinct editions. These can't be used to specify the edition of proto
// files, but feature definitions must supply proto2/proto3 defaults for
// backwards compatibility.
EDITION_PROTO2 = 998;
EDITION_PROTO3 = 999;
// Editions that have been released. The specific values are arbitrary and
// should not be depended on, but they will always be time-ordered for easy
// comparison.
EDITION_2023 = 1000;
EDITION_2024 = 1001;
// Placeholder editions for testing feature resolution. These should not be
// used or relyed on outside of tests.
EDITION_1_TEST_ONLY = 1;
EDITION_2_TEST_ONLY = 2;
EDITION_99997_TEST_ONLY = 99997;
EDITION_99998_TEST_ONLY = 99998;
EDITION_99999_TEST_ONLY = 99999;
// Placeholder for specifying unbounded edition support. This should only
// ever be used by plugins that can expect to never require any changes to
// support a new edition.
EDITION_MAX = 0x7FFFFFFF;
}
// Describes a complete .proto file.
message FileDescriptorProto {
optional string name = 1; // file name, relative to root of source tree
optional string package = 2; // e.g. "foo", "foo.bar", etc.
// Names of files imported by this file.
repeated string dependency = 3;
// Indexes of the public imported files in the dependency list above.
repeated int32 public_dependency = 10;
// Indexes of the weak imported files in the dependency list.
// For Google-internal migration only. Do not use.
repeated int32 weak_dependency = 11;
// All top-level definitions in this file.
repeated DescriptorProto message_type = 4;
repeated EnumDescriptorProto enum_type = 5;
repeated ServiceDescriptorProto service = 6;
repeated FieldDescriptorProto extension = 7;
optional FileOptions options = 8;
// This field contains optional information about the original source code.
// You may safely remove this entire field without harming runtime
// functionality of the descriptors -- the information is needed only by
// development tools.
optional SourceCodeInfo source_code_info = 9;
// The syntax of the proto file.
// The supported values are "proto2", "proto3", and "editions".
//
// If `edition` is present, this value must be "editions".
optional string syntax = 12;
// The edition of the proto file.
optional Edition edition = 14;
}
// Describes a message type.
message DescriptorProto {
optional string name = 1;
repeated FieldDescriptorProto field = 2;
repeated FieldDescriptorProto extension = 6;
repeated DescriptorProto nested_type = 3;
repeated EnumDescriptorProto enum_type = 4;
message ExtensionRange {
optional int32 start = 1; // Inclusive.
optional int32 end = 2; // Exclusive.
optional ExtensionRangeOptions options = 3;
}
repeated ExtensionRange extension_range = 5;
repeated OneofDescriptorProto oneof_decl = 8;
optional MessageOptions options = 7;
// Range of reserved tag numbers. Reserved tag numbers may not be used by
// fields or extension ranges in the same message. Reserved ranges may
// not overlap.
message ReservedRange {
optional int32 start = 1; // Inclusive.
optional int32 end = 2; // Exclusive.
}
repeated ReservedRange reserved_range = 9;
// Reserved field names, which may not be used by fields in the same message.
// A given name may only be reserved once.
repeated string reserved_name = 10;
}
message ExtensionRangeOptions {
// The parser stores options it doesn't recognize here. See above.
repeated UninterpretedOption uninterpreted_option = 999;
message Declaration {
// The extension number declared within the extension range.
optional int32 number = 1;
// The fully-qualified name of the extension field. There must be a leading
// dot in front of the full name.
optional string full_name = 2;
// The fully-qualified type name of the extension field. Unlike
// Metadata.type, Declaration.type must have a leading dot for messages
// and enums.
optional string type = 3;
// If true, indicates that the number is reserved in the extension range,
// and any extension field with the number will fail to compile. Set this
// when a declared extension field is deleted.
optional bool reserved = 5;
// If true, indicates that the extension must be defined as repeated.
// Otherwise the extension must be defined as optional.
optional bool repeated = 6;
reserved 4; // removed is_repeated
}
// For external users: DO NOT USE. We are in the process of open sourcing
// extension declaration and executing internal cleanups before it can be
// used externally.
repeated Declaration declaration = 2 [retention = RETENTION_SOURCE];
// Any features defined in the specific edition.
optional FeatureSet features = 50;
// The verification state of the extension range.
enum VerificationState {
// All the extensions of the range must be declared.
DECLARATION = 0;
UNVERIFIED = 1;
}
// The verification state of the range.
// TODO: flip the default to DECLARATION once all empty ranges
// are marked as UNVERIFIED.
optional VerificationState verification = 3
[default = UNVERIFIED, retention = RETENTION_SOURCE];
// Clients can define custom options in extensions of this message. See above.
extensions 1000 to max;
}
// Describes a field within a message.
message FieldDescriptorProto {
enum Type {
// 0 is reserved for errors.
// Order is weird for historical reasons.
TYPE_DOUBLE = 1;
TYPE_FLOAT = 2;
// Not ZigZag encoded. Negative numbers take 10 bytes. Use TYPE_SINT64 if
// negative values are likely.
TYPE_INT64 = 3;
TYPE_UINT64 = 4;
// Not ZigZag encoded. Negative numbers take 10 bytes. Use TYPE_SINT32 if
// negative values are likely.
TYPE_INT32 = 5;
TYPE_FIXED64 = 6;
TYPE_FIXED32 = 7;
TYPE_BOOL = 8;
TYPE_STRING = 9;
// Tag-delimited aggregate.
// Group type is deprecated and not supported after google.protobuf. However, Proto3
// implementations should still be able to parse the group wire format and
// treat group fields as unknown fields. In Editions, the group wire format
// can be enabled via the `message_encoding` feature.
TYPE_GROUP = 10;
TYPE_MESSAGE = 11; // Length-delimited aggregate.
// New in version 2.
TYPE_BYTES = 12;
TYPE_UINT32 = 13;
TYPE_ENUM = 14;
TYPE_SFIXED32 = 15;
TYPE_SFIXED64 = 16;
TYPE_SINT32 = 17; // Uses ZigZag encoding.
TYPE_SINT64 = 18; // Uses ZigZag encoding.
}
enum Label {
// 0 is reserved for errors
LABEL_OPTIONAL = 1;
LABEL_REPEATED = 3;
// The required label is only allowed in google.protobuf. In proto3 and Editions
// it's explicitly prohibited. In Editions, the `field_presence` feature
// can be used to get this behavior.
LABEL_REQUIRED = 2;
}
optional string name = 1;
optional int32 number = 3;
optional Label label = 4;
// If type_name is set, this need not be set. If both this and type_name
// are set, this must be one of TYPE_ENUM, TYPE_MESSAGE or TYPE_GROUP.
optional Type type = 5;
// For message and enum types, this is the name of the type. If the name
// starts with a '.', it is fully-qualified. Otherwise, C++-like scoping
// rules are used to find the type (i.e. first the nested types within this
// message are searched, then within the parent, on up to the root
// namespace).
optional string type_name = 6;
// For extensions, this is the name of the type being extended. It is
// resolved in the same manner as type_name.
optional string extendee = 2;
// For numeric types, contains the original text representation of the value.
// For booleans, "true" or "false".
// For strings, contains the default text contents (not escaped in any way).
// For bytes, contains the C escaped value. All bytes >= 128 are escaped.
optional string default_value = 7;
// If set, gives the index of a oneof in the containing type's oneof_decl
// list. This field is a member of that oneof.
optional int32 oneof_index = 9;
// JSON name of this field. The value is set by protocol compiler. If the
// user has set a "json_name" option on this field, that option's value
// will be used. Otherwise, it's deduced from the field's name by converting
// it to camelCase.
optional string json_name = 10;
optional FieldOptions options = 8;
// If true, this is a proto3 "optional". When a proto3 field is optional, it
// tracks presence regardless of field type.
//
// When proto3_optional is true, this field must belong to a oneof to signal
// to old proto3 clients that presence is tracked for this field. This oneof
// is known as a "synthetic" oneof, and this field must be its sole member
// (each proto3 optional field gets its own synthetic oneof). Synthetic oneofs
// exist in the descriptor only, and do not generate any API. Synthetic oneofs
// must be ordered after all "real" oneofs.
//
// For message fields, proto3_optional doesn't create any semantic change,
// since non-repeated message fields always track presence. However it still
// indicates the semantic detail of whether the user wrote "optional" or not.
// This can be useful for round-tripping the .proto file. For consistency we
// give message fields a synthetic oneof also, even though it is not required
// to track presence. This is especially important because the parser can't
// tell if a field is a message or an enum, so it must always create a
// synthetic oneof.
//
// Proto2 optional fields do not set this flag, because they already indicate
// optional with `LABEL_OPTIONAL`.
optional bool proto3_optional = 17;
}
// Describes a oneof.
message OneofDescriptorProto {
optional string name = 1;
optional OneofOptions options = 2;
}
// Describes an enum type.
message EnumDescriptorProto {
optional string name = 1;
repeated EnumValueDescriptorProto value = 2;
optional EnumOptions options = 3;
// Range of reserved numeric values. Reserved values may not be used by
// entries in the same enum. Reserved ranges may not overlap.
//
// Note that this is distinct from DescriptorProto.ReservedRange in that it
// is inclusive such that it can appropriately represent the entire int32
// domain.
message EnumReservedRange {
optional int32 start = 1; // Inclusive.
optional int32 end = 2; // Inclusive.
}
// Range of reserved numeric values. Reserved numeric values may not be used
// by enum values in the same enum declaration. Reserved ranges may not
// overlap.
repeated EnumReservedRange reserved_range = 4;
// Reserved enum value names, which may not be reused. A given name may only
// be reserved once.
repeated string reserved_name = 5;
}
// Describes a value within an enum.
message EnumValueDescriptorProto {
optional string name = 1;
optional int32 number = 2;
optional EnumValueOptions options = 3;
}
// Describes a service.
message ServiceDescriptorProto {
optional string name = 1;
repeated MethodDescriptorProto method = 2;
optional ServiceOptions options = 3;
}
// Describes a method of a service.
message MethodDescriptorProto {
optional string name = 1;
// Input and output type names. These are resolved in the same way as
// FieldDescriptorProto.type_name, but must refer to a message type.
optional string input_type = 2;
optional string output_type = 3;
optional MethodOptions options = 4;
// Identifies if client streams multiple client messages
optional bool client_streaming = 5 [default = false];
// Identifies if server streams multiple server messages
optional bool server_streaming = 6 [default = false];
}
// ===================================================================
// Options
// Each of the definitions above may have "options" attached. These are
// just annotations which may cause code to be generated slightly differently
// or may contain hints for code that manipulates protocol messages.
//
// Clients may define custom options as extensions of the *Options messages.
// These extensions may not yet be known at parsing time, so the parser cannot
// store the values in them. Instead it stores them in a field in the *Options
// message called uninterpreted_option. This field must have the same name
// across all *Options messages. We then use this field to populate the
// extensions when we build a descriptor, at which point all protos have been
// parsed and so all extensions are known.
//
// Extension numbers for custom options may be chosen as follows:
// * For options which will only be used within a single application or
// organization, or for experimental options, use field numbers 50000
// through 99999. It is up to you to ensure that you do not use the
// same number for multiple options.
// * For options which will be published and used publicly by multiple
// independent entities, e-mail protobuf-global-extension-registry@google.com
// to reserve extension numbers. Simply provide your project name (e.g.
// Objective-C plugin) and your project website (if available) -- there's no
// need to explain how you intend to use them. Usually you only need one
// extension number. You can declare multiple options with only one extension
// number by putting them in a sub-message. See the Custom Options section of
// the docs for examples:
// https://developers.google.com/protocol-buffers/docs/proto#options
// If this turns out to be popular, a web service will be set up
// to automatically assign option numbers.
message FileOptions {
// Sets the Java package where classes generated from this .proto will be
// placed. By default, the proto package is used, but this is often
// inappropriate because proto packages do not normally start with backwards
// domain names.
optional string java_package = 1;
// Controls the name of the wrapper Java class generated for the .proto file.
// That class will always contain the .proto file's getDescriptor() method as
// well as any top-level extensions defined in the .proto file.
// If java_multiple_files is disabled, then all the other classes from the
// .proto file will be nested inside the single wrapper outer class.
optional string java_outer_classname = 8;
// If enabled, then the Java code generator will generate a separate .java
// file for each top-level message, enum, and service defined in the .proto
// file. Thus, these types will *not* be nested inside the wrapper class
// named by java_outer_classname. However, the wrapper class will still be
// generated to contain the file's getDescriptor() method as well as any
// top-level extensions defined in the file.
optional bool java_multiple_files = 10 [default = false];
// This option does nothing.
optional bool java_generate_equals_and_hash = 20 [deprecated=true];
// If set true, then the Java2 code generator will generate code that
// throws an exception whenever an attempt is made to assign a non-UTF-8
// byte sequence to a string field.
// Message reflection will do the same.
// However, an extension field still accepts non-UTF-8 byte sequences.
// This option has no effect on when used with the lite runtime.
optional bool java_string_check_utf8 = 27 [default = false];
// Generated classes can be optimized for speed or code size.
enum OptimizeMode {
SPEED = 1; // Generate complete code for parsing, serialization,
// etc.
CODE_SIZE = 2; // Use ReflectionOps to implement these methods.
LITE_RUNTIME = 3; // Generate code using MessageLite and the lite runtime.
}
optional OptimizeMode optimize_for = 9 [default = SPEED];
// Sets the Go package where structs generated from this .proto will be
// placed. If omitted, the Go package will be derived from the following:
// - The basename of the package import path, if provided.
// - Otherwise, the package statement in the .proto file, if present.
// - Otherwise, the basename of the .proto file, without extension.
optional string go_package = 11;
// Should generic services be generated in each language? "Generic" services
// are not specific to any particular RPC system. They are generated by the
// main code generators in each language (without additional plugins).
// Generic services were the only kind of service generation supported by
// early versions of google.protobuf.
//
// Generic services are now considered deprecated in favor of using plugins
// that generate code specific to your particular RPC system. Therefore,
// these default to false. Old code which depends on generic services should
// explicitly set them to true.
optional bool cc_generic_services = 16 [default = false];
optional bool java_generic_services = 17 [default = false];
optional bool py_generic_services = 18 [default = false];
reserved 42; // removed php_generic_services
// Is this file deprecated?
// Depending on the target platform, this can emit Deprecated annotations
// for everything in the file, or it will be completely ignored; in the very
// least, this is a formalization for deprecating files.
optional bool deprecated = 23 [default = false];
// Enables the use of arenas for the proto messages in this file. This applies
// only to generated classes for C++.
optional bool cc_enable_arenas = 31 [default = true];
// Sets the objective c class prefix which is prepended to all objective c
// generated classes from this .proto. There is no default.
optional string objc_class_prefix = 36;
// Namespace for generated classes; defaults to the package.
optional string csharp_namespace = 37;
// By default Swift generators will take the proto package and CamelCase it
// replacing '.' with underscore and use that to prefix the types/symbols
// defined. When this options is provided, they will use this value instead
// to prefix the types/symbols defined.
optional string swift_prefix = 39;
// Sets the php class prefix which is prepended to all php generated classes
// from this .proto. Default is empty.
optional string php_class_prefix = 40;
// Use this option to change the namespace of php generated classes. Default
// is empty. When this option is empty, the package name will be used for
// determining the namespace.
optional string php_namespace = 41;
// Use this option to change the namespace of php generated metadata classes.
// Default is empty. When this option is empty, the proto file name will be
// used for determining the namespace.
optional string php_metadata_namespace = 44;
// Use this option to change the package of ruby generated classes. Default
// is empty. When this option is not set, the package name will be used for
// determining the ruby package.
optional string ruby_package = 45;
// Any features defined in the specific edition.
optional FeatureSet features = 50;
// The parser stores options it doesn't recognize here.
// See the documentation for the "Options" section above.
repeated UninterpretedOption uninterpreted_option = 999;
// Clients can define custom options in extensions of this message.
// See the documentation for the "Options" section above.
extensions 1000 to max;
reserved 38;
}
message MessageOptions {
// Set true to use the old proto1 MessageSet wire format for extensions.
// This is provided for backwards-compatibility with the MessageSet wire
// format. You should not use this for any other reason: It's less
// efficient, has fewer features, and is more complicated.
//
// The message must be defined exactly as follows:
// message Foo {
// option message_set_wire_format = true;
// extensions 4 to max;
// }
// Note that the message cannot have any defined fields; MessageSets only
// have extensions.
//
// All extensions of your type must be singular messages; e.g. they cannot
// be int32s, enums, or repeated messages.
//
// Because this is an option, the above two restrictions are not enforced by
// the protocol compiler.
optional bool message_set_wire_format = 1 [default = false];
// Disables the generation of the standard "descriptor()" accessor, which can
// conflict with a field of the same name. This is meant to make migration
// from proto1 easier; new code should avoid fields named "descriptor".
optional bool no_standard_descriptor_accessor = 2 [default = false];
// Is this message deprecated?
// Depending on the target platform, this can emit Deprecated annotations
// for the message, or it will be completely ignored; in the very least,
// this is a formalization for deprecating messages.
optional bool deprecated = 3 [default = false];
reserved 4, 5, 6;
// Whether the message is an automatically generated map entry type for the
// maps field.
//
// For maps fields:
// map<KeyType, ValueType> map_field = 1;
// The parsed descriptor looks like:
// message MapFieldEntry {
// option map_entry = true;
// optional KeyType key = 1;
// optional ValueType value = 2;
// }
// repeated MapFieldEntry map_field = 1;
//
// Implementations may choose not to generate the map_entry=true message, but
// use a native map in the target language to hold the keys and values.
// The reflection APIs in such implementations still need to work as
// if the field is a repeated message field.
//
// NOTE: Do not set the option in .proto files. Always use the maps syntax
// instead. The option should only be implicitly set by the proto compiler
// parser.
optional bool map_entry = 7;
reserved 8; // javalite_serializable
reserved 9; // javanano_as_lite
// Enable the legacy handling of JSON field name conflicts. This lowercases
// and strips underscored from the fields before comparison in proto3 only.
// The new behavior takes `json_name` into account and applies to proto2 as
// well.
//
// This should only be used as a temporary measure against broken builds due
// to the change in behavior for JSON field name conflicts.
//
// TODO This is legacy behavior we plan to remove once downstream
// teams have had time to migrate.
optional bool deprecated_legacy_json_field_conflicts = 11 [deprecated = true];
// Any features defined in the specific edition.
optional FeatureSet features = 12;
// The parser stores options it doesn't recognize here. See above.
repeated UninterpretedOption uninterpreted_option = 999;
// Clients can define custom options in extensions of this message. See above.
extensions 1000 to max;
}
message FieldOptions {
// The ctype option instructs the C++ code generator to use a different
// representation of the field than it normally would. See the specific
// options below. This option is only implemented to support use of
// [ctype=CORD] and [ctype=STRING] (the default) on non-repeated fields of
// type "bytes" in the open source release -- sorry, we'll try to include
// other types in a future version!
optional CType ctype = 1 [default = STRING];
enum CType {
// Default mode.
STRING = 0;
// The option [ctype=CORD] may be applied to a non-repeated field of type
// "bytes". It indicates that in C++, the data should be stored in a Cord
// instead of a string. For very large strings, this may reduce memory
// fragmentation. It may also allow better performance when parsing from a
// Cord, or when parsing with aliasing enabled, as the parsed Cord may then
// alias the original buffer.
CORD = 1;
STRING_PIECE = 2;
}
// The packed option can be enabled for repeated primitive fields to enable
// a more efficient representation on the wire. Rather than repeatedly
// writing the tag and type for each element, the entire array is encoded as
// a single length-delimited blob. In proto3, only explicit setting it to
// false will avoid using packed encoding. This option is prohibited in
// Editions, but the `repeated_field_encoding` feature can be used to control
// the behavior.
optional bool packed = 2;
// The jstype option determines the JavaScript type used for values of the
// field. The option is permitted only for 64 bit integral and fixed types
// (int64, uint64, sint64, fixed64, sfixed64). A field with jstype JS_STRING
// is represented as JavaScript string, which avoids loss of precision that
// can happen when a large value is converted to a floating point JavaScript.
// Specifying JS_NUMBER for the jstype causes the generated JavaScript code to
// use the JavaScript "number" type. The behavior of the default option
// JS_NORMAL is implementation dependent.
//
// This option is an enum to permit additional types to be added, e.g.
// goog.math.Integer.
optional JSType jstype = 6 [default = JS_NORMAL];
enum JSType {
// Use the default type.
JS_NORMAL = 0;
// Use JavaScript strings.
JS_STRING = 1;
// Use JavaScript numbers.
JS_NUMBER = 2;
}
// Should this field be parsed lazily? Lazy applies only to message-type
// fields. It means that when the outer message is initially parsed, the
// inner message's contents will not be parsed but instead stored in encoded
// form. The inner message will actually be parsed when it is first accessed.
//
// This is only a hint. Implementations are free to choose whether to use
// eager or lazy parsing regardless of the value of this option. However,
// setting this option true suggests that the protocol author believes that
// using lazy parsing on this field is worth the additional bookkeeping
// overhead typically needed to implement it.
//
// This option does not affect the public interface of any generated code;
// all method signatures remain the same. Furthermore, thread-safety of the
// interface is not affected by this option; const methods remain safe to
// call from multiple threads concurrently, while non-const methods continue
// to require exclusive access.
//
// Note that lazy message fields are still eagerly verified to check
// ill-formed wireformat or missing required fields. Calling IsInitialized()
// on the outer message would fail if the inner message has missing required
// fields. Failed verification would result in parsing failure (except when
// uninitialized messages are acceptable).
optional bool lazy = 5 [default = false];
// unverified_lazy does no correctness checks on the byte stream. This should
// only be used where lazy with verification is prohibitive for performance
// reasons.
optional bool unverified_lazy = 15 [default = false];
// Is this field deprecated?
// Depending on the target platform, this can emit Deprecated annotations
// for accessors, or it will be completely ignored; in the very least, this
// is a formalization for deprecating fields.
optional bool deprecated = 3 [default = false];
// For Google-internal migration only. Do not use.
optional bool weak = 10 [default = false];
// Indicate that the field value should not be printed out when using debug
// formats, e.g. when the field contains sensitive credentials.
optional bool debug_redact = 16 [default = false];
// If set to RETENTION_SOURCE, the option will be omitted from the binary.
// Note: as of January 2023, support for this is in progress and does not yet
// have an effect (b/264593489).
enum OptionRetention {
RETENTION_UNKNOWN = 0;
RETENTION_RUNTIME = 1;
RETENTION_SOURCE = 2;
}
optional OptionRetention retention = 17;
// This indicates the types of entities that the field may apply to when used
// as an option. If it is unset, then the field may be freely used as an
// option on any kind of entity. Note: as of January 2023, support for this is
// in progress and does not yet have an effect (b/264593489).
enum OptionTargetType {
TARGET_TYPE_UNKNOWN = 0;
TARGET_TYPE_FILE = 1;
TARGET_TYPE_EXTENSION_RANGE = 2;
TARGET_TYPE_MESSAGE = 3;
TARGET_TYPE_FIELD = 4;
TARGET_TYPE_ONEOF = 5;
TARGET_TYPE_ENUM = 6;
TARGET_TYPE_ENUM_ENTRY = 7;
TARGET_TYPE_SERVICE = 8;
TARGET_TYPE_METHOD = 9;
}
repeated OptionTargetType targets = 19;
message EditionDefault {
optional Edition edition = 3;
optional string value = 2; // Textproto value.
}
repeated EditionDefault edition_defaults = 20;
// Any features defined in the specific edition.
optional FeatureSet features = 21;
// The parser stores options it doesn't recognize here. See above.
repeated UninterpretedOption uninterpreted_option = 999;
// Clients can define custom options in extensions of this message. See above.
extensions 1000 to max;
reserved 4; // removed jtype
reserved 18; // reserve target, target_obsolete_do_not_use
}
message OneofOptions {
// Any features defined in the specific edition.
optional FeatureSet features = 1;
// The parser stores options it doesn't recognize here. See above.
repeated UninterpretedOption uninterpreted_option = 999;
// Clients can define custom options in extensions of this message. See above.
extensions 1000 to max;
}
message EnumOptions {
// Set this option to true to allow mapping different tag names to the same
// value.
optional bool allow_alias = 2;
// Is this enum deprecated?
// Depending on the target platform, this can emit Deprecated annotations
// for the enum, or it will be completely ignored; in the very least, this
// is a formalization for deprecating enums.
optional bool deprecated = 3 [default = false];
reserved 5; // javanano_as_lite
// Enable the legacy handling of JSON field name conflicts. This lowercases
// and strips underscored from the fields before comparison in proto3 only.
// The new behavior takes `json_name` into account and applies to proto2 as
// well.
// TODO Remove this legacy behavior once downstream teams have
// had time to migrate.
optional bool deprecated_legacy_json_field_conflicts = 6 [deprecated = true];
// Any features defined in the specific edition.
optional FeatureSet features = 7;
// The parser stores options it doesn't recognize here. See above.
repeated UninterpretedOption uninterpreted_option = 999;
// Clients can define custom options in extensions of this message. See above.
extensions 1000 to max;
}
message EnumValueOptions {
// Is this enum value deprecated?
// Depending on the target platform, this can emit Deprecated annotations
// for the enum value, or it will be completely ignored; in the very least,
// this is a formalization for deprecating enum values.
optional bool deprecated = 1 [default = false];
// Any features defined in the specific edition.
optional FeatureSet features = 2;
// Indicate that fields annotated with this enum value should not be printed
// out when using debug formats, e.g. when the field contains sensitive
// credentials.
optional bool debug_redact = 3 [default = false];
// The parser stores options it doesn't recognize here. See above.
repeated UninterpretedOption uninterpreted_option = 999;
// Clients can define custom options in extensions of this message. See above.
extensions 1000 to max;
}
message ServiceOptions {
// Any features defined in the specific edition.
optional FeatureSet features = 34;
// Note: Field numbers 1 through 32 are reserved for Google's internal RPC
// framework. We apologize for hoarding these numbers to ourselves, but
// we were already using them long before we decided to release Protocol
// Buffers.
// Is this service deprecated?
// Depending on the target platform, this can emit Deprecated annotations
// for the service, or it will be completely ignored; in the very least,
// this is a formalization for deprecating services.
optional bool deprecated = 33 [default = false];
// The parser stores options it doesn't recognize here. See above.
repeated UninterpretedOption uninterpreted_option = 999;
// Clients can define custom options in extensions of this message. See above.
extensions 1000 to max;
}
message MethodOptions {
// Note: Field numbers 1 through 32 are reserved for Google's internal RPC
// framework. We apologize for hoarding these numbers to ourselves, but
// we were already using them long before we decided to release Protocol
// Buffers.
// Is this method deprecated?
// Depending on the target platform, this can emit Deprecated annotations
// for the method, or it will be completely ignored; in the very least,
// this is a formalization for deprecating methods.
optional bool deprecated = 33 [default = false];
// Is this method side-effect-free (or safe in HTTP parlance), or idempotent,
// or neither? HTTP based RPC implementation may choose GET verb for safe
// methods, and PUT verb for idempotent methods instead of the default POST.
enum IdempotencyLevel {
IDEMPOTENCY_UNKNOWN = 0;
NO_SIDE_EFFECTS = 1; // implies idempotent
IDEMPOTENT = 2; // idempotent, but may have side effects
}
optional IdempotencyLevel idempotency_level = 34
[default = IDEMPOTENCY_UNKNOWN];
// Any features defined in the specific edition.
optional FeatureSet features = 35;
// The parser stores options it doesn't recognize here. See above.
repeated UninterpretedOption uninterpreted_option = 999;
// Clients can define custom options in extensions of this message. See above.
extensions 1000 to max;
}
// A message representing a option the parser does not recognize. This only
// appears in options protos created by the compiler::Parser class.
// DescriptorPool resolves these when building Descriptor objects. Therefore,
// options protos in descriptor objects (e.g. returned by Descriptor::options(),
// or produced by Descriptor::CopyTo()) will never have UninterpretedOptions
// in them.
message UninterpretedOption {
// The name of the uninterpreted option. Each string represents a segment in
// a dot-separated name. is_extension is true iff a segment represents an
// extension (denoted with parentheses in options specs in .proto files).
// E.g.,{ ["foo", false], ["bar.baz", true], ["moo", false] } represents
// "foo.(bar.baz).moo".
message NamePart {
required string name_part = 1;
required bool is_extension = 2;
}
repeated NamePart name = 2;
// The value of the uninterpreted option, in whatever type the tokenizer
// identified it as during parsing. Exactly one of these should be set.
optional string identifier_value = 3;
optional uint64 positive_int_value = 4;
optional int64 negative_int_value = 5;
optional double double_value = 6;
optional bytes string_value = 7;
optional string aggregate_value = 8;
}
// ===================================================================
// Features
// TODO Enums in C++ gencode (and potentially other languages) are
// not well scoped. This means that each of the feature enums below can clash
// with each other. The short names we've chosen maximize call-site
// readability, but leave us very open to this scenario. A future feature will
// be designed and implemented to handle this, hopefully before we ever hit a
// conflict here.
message FeatureSet {
enum FieldPresence {
FIELD_PRESENCE_UNKNOWN = 0;
EXPLICIT = 1;
IMPLICIT = 2;
LEGACY_REQUIRED = 3;
}
optional FieldPresence field_presence = 1 [
retention = RETENTION_RUNTIME,
targets = TARGET_TYPE_FIELD,
targets = TARGET_TYPE_FILE,
edition_defaults = { edition: EDITION_PROTO2, value: "EXPLICIT" },
edition_defaults = { edition: EDITION_PROTO3, value: "IMPLICIT" },
edition_defaults = { edition: EDITION_2023, value: "EXPLICIT" }
];
enum EnumType {
ENUM_TYPE_UNKNOWN = 0;
OPEN = 1;
CLOSED = 2;
}
optional EnumType enum_type = 2 [
retention = RETENTION_RUNTIME,
targets = TARGET_TYPE_ENUM,
targets = TARGET_TYPE_FILE,
edition_defaults = { edition: EDITION_PROTO2, value: "CLOSED" },
edition_defaults = { edition: EDITION_PROTO3, value: "OPEN" }
];
enum RepeatedFieldEncoding {
REPEATED_FIELD_ENCODING_UNKNOWN = 0;
PACKED = 1;
EXPANDED = 2;
}
optional RepeatedFieldEncoding repeated_field_encoding = 3 [
retention = RETENTION_RUNTIME,
targets = TARGET_TYPE_FIELD,
targets = TARGET_TYPE_FILE,
edition_defaults = { edition: EDITION_PROTO2, value: "EXPANDED" },
edition_defaults = { edition: EDITION_PROTO3, value: "PACKED" }
];
enum Utf8Validation {
UTF8_VALIDATION_UNKNOWN = 0;
VERIFY = 2;
NONE = 3;
}
optional Utf8Validation utf8_validation = 4 [
retention = RETENTION_RUNTIME,
targets = TARGET_TYPE_FIELD,
targets = TARGET_TYPE_FILE,
edition_defaults = { edition: EDITION_PROTO2, value: "NONE" },
edition_defaults = { edition: EDITION_PROTO3, value: "VERIFY" }
];
enum MessageEncoding {
MESSAGE_ENCODING_UNKNOWN = 0;
LENGTH_PREFIXED = 1;
DELIMITED = 2;
}
optional MessageEncoding message_encoding = 5 [
retention = RETENTION_RUNTIME,
targets = TARGET_TYPE_FIELD,
targets = TARGET_TYPE_FILE,
edition_defaults = { edition: EDITION_PROTO2, value: "LENGTH_PREFIXED" }
];
enum JsonFormat {
JSON_FORMAT_UNKNOWN = 0;
ALLOW = 1;
LEGACY_BEST_EFFORT = 2;
}
optional JsonFormat json_format = 6 [
retention = RETENTION_RUNTIME,
targets = TARGET_TYPE_MESSAGE,
targets = TARGET_TYPE_ENUM,
targets = TARGET_TYPE_FILE,
edition_defaults = { edition: EDITION_PROTO2, value: "LEGACY_BEST_EFFORT" },
edition_defaults = { edition: EDITION_PROTO3, value: "ALLOW" }
];
reserved 999;
extensions 1000; // for Protobuf C++
extensions 1001; // for Protobuf Java
extensions 1002; // for Protobuf Go
extensions 9995 to 9999; // For internal testing
extensions 10000; // for https://github.com/bufbuild/protobuf-es
}
// A compiled specification for the defaults of a set of features. These
// messages are generated from FeatureSet extensions and can be used to seed
// feature resolution. The resolution with this object becomes a simple search
// for the closest matching edition, followed by proto merges.
message FeatureSetDefaults {
// A map from every known edition with a unique set of defaults to its
// defaults. Not all editions may be contained here. For a given edition,
// the defaults at the closest matching edition ordered at or before it should
// be used. This field must be in strict ascending order by edition.
message FeatureSetEditionDefault {
optional Edition edition = 3;
optional FeatureSet features = 2;
}
repeated FeatureSetEditionDefault defaults = 1;
// The minimum supported edition (inclusive) when this was constructed.
// Editions before this will not have defaults.
optional Edition minimum_edition = 4;
// The maximum known edition (inclusive) when this was constructed. Editions
// after this will not have reliable defaults.
optional Edition maximum_edition = 5;
}
// ===================================================================
// Optional source code info
// Encapsulates information about the original source file from which a
// FileDescriptorProto was generated.
message SourceCodeInfo {
// A Location identifies a piece of source code in a .proto file which
// corresponds to a particular definition. This information is intended
// to be useful to IDEs, code indexers, documentation generators, and similar
// tools.
//
// For example, say we have a file like:
// message Foo {
// optional string foo = 1;
// }
// Let's look at just the field definition:
// optional string foo = 1;
// ^ ^^ ^^ ^ ^^^
// a bc de f ghi
// We have the following locations:
// span path represents
// [a,i) [ 4, 0, 2, 0 ] The whole field definition.
// [a,b) [ 4, 0, 2, 0, 4 ] The label (optional).
// [c,d) [ 4, 0, 2, 0, 5 ] The type (string).
// [e,f) [ 4, 0, 2, 0, 1 ] The name (foo).
// [g,h) [ 4, 0, 2, 0, 3 ] The number (1).
//
// Notes:
// - A location may refer to a repeated field itself (i.e. not to any
// particular index within it). This is used whenever a set of elements are
// logically enclosed in a single code segment. For example, an entire
// extend block (possibly containing multiple extension definitions) will
// have an outer location whose path refers to the "extensions" repeated
// field without an index.
// - Multiple locations may have the same path. This happens when a single
// logical declaration is spread out across multiple places. The most
// obvious example is the "extend" block again -- there may be multiple
// extend blocks in the same scope, each of which will have the same path.
// - A location's span is not always a subset of its parent's span. For
// example, the "extendee" of an extension declaration appears at the
// beginning of the "extend" block and is shared by all extensions within
// the block.
// - Just because a location's span is a subset of some other location's span
// does not mean that it is a descendant. For example, a "group" defines
// both a type and a field in a single declaration. Thus, the locations
// corresponding to the type and field and their components will overlap.
// - Code which tries to interpret locations should probably be designed to
// ignore those that it doesn't understand, as more types of locations could
// be recorded in the future.
repeated Location location = 1;
message Location {
// Identifies which part of the FileDescriptorProto was defined at this
// location.
//
// Each element is a field number or an index. They form a path from
// the root FileDescriptorProto to the place where the definition appears.
// For example, this path:
// [ 4, 3, 2, 7, 1 ]
// refers to:
// file.message_type(3) // 4, 3
// .field(7) // 2, 7
// .name() // 1
// This is because FileDescriptorProto.message_type has field number 4:
// repeated DescriptorProto message_type = 4;
// and DescriptorProto.field has field number 2:
// repeated FieldDescriptorProto field = 2;
// and FieldDescriptorProto.name has field number 1:
// optional string name = 1;
//
// Thus, the above path gives the location of a field name. If we removed
// the last element:
// [ 4, 3, 2, 7 ]
// this path refers to the whole field declaration (from the beginning
// of the label to the terminating semicolon).
repeated int32 path = 1 [packed = true];
// Always has exactly three or four elements: start line, start column,
// end line (optional, otherwise assumed same as start line), end column.
// These are packed into a single field for efficiency. Note that line
// and column numbers are zero-based -- typically you will want to add
// 1 to each before displaying to a user.
repeated int32 span = 2 [packed = true];
// If this SourceCodeInfo represents a complete declaration, these are any
// comments appearing before and after the declaration which appear to be
// attached to the declaration.
//
// A series of line comments appearing on consecutive lines, with no other
// tokens appearing on those lines, will be treated as a single comment.
//
// leading_detached_comments will keep paragraphs of comments that appear
// before (but not connected to) the current element. Each paragraph,
// separated by empty lines, will be one comment element in the repeated
// field.
//
// Only the comment content is provided; comment markers (e.g. //) are
// stripped out. For block comments, leading whitespace and an asterisk
// will be stripped from the beginning of each line other than the first.
// Newlines are included in the output.
//
// Examples:
//
// optional int32 foo = 1; // Comment attached to foo.
// // Comment attached to bar.
// optional int32 bar = 2;
//
// optional string baz = 3;
// // Comment attached to baz.
// // Another line attached to baz.
//
// // Comment attached to moo.
// //
// // Another line attached to moo.
// optional double moo = 4;
//
// // Detached comment for corge. This is not leading or trailing comments
// // to moo or corge because there are blank lines separating it from
// // both.
//
// // Detached comment for corge paragraph 2.
//
// optional string corge = 5;
// /* Block comment attached
// * to corge. Leading asterisks
// * will be removed. */
// /* Block comment attached to
// * grault. */
// optional int32 grault = 6;
//
// // ignored detached comments.
optional string leading_comments = 3;
optional string trailing_comments = 4;
repeated string leading_detached_comments = 6;
}
}
// Describes the relationship between generated code and its original source
// file. A GeneratedCodeInfo message is associated with only one generated
// source file, but may contain references to different source .proto files.
message GeneratedCodeInfo {
// An Annotation connects some span of text in generated code to an element
// of its generating .proto file.
repeated Annotation annotation = 1;
message Annotation {
// Identifies the element in the original source .proto file. This field
// is formatted the same as SourceCodeInfo.Location.path.
repeated int32 path = 1 [packed = true];
// Identifies the filesystem path to the original source .proto.
optional string source_file = 2;
// Identifies the starting offset in bytes in the generated code
// that relates to the identified object.
optional int32 begin = 3;
// Identifies the ending offset in bytes in the generated code that
// relates to the identified object. The end offset should be one past
// the last relevant byte (so the length of the text = end - begin).
optional int32 end = 4;
// Represents the identified object's effect on the element in the original
// .proto file.
enum Semantic {
// There is no effect or the effect is indescribable.
NONE = 0;
// The element is set or otherwise mutated.
SET = 1;
// An alias to the element is returned.
ALIAS = 2;
}
optional Semantic semantic = 5;
}
}