planning

node_modules/protocol-buffers-schema/test/fixtures/option.proto

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+import "google/protobuf/descriptor.proto";
+
+extend google.protobuf.FileOptions {
+  optional string my_file_option = 50000;
+}
+extend google.protobuf.MessageOptions {
+  optional int32 my_message_option = 50001;
+}
+extend google.protobuf.FieldOptions {
+  optional float my_field_option = 50002;
+}
+extend google.protobuf.EnumOptions {
+  optional bool my_enum_option = 50003;
+}
+extend google.protobuf.EnumValueOptions {
+  optional uint32 my_enum_value_option = 50004;
+}
+extend google.protobuf.ServiceOptions {
+  optional MyEnum my_service_option = 50005;
+}
+extend google.protobuf.MethodOptions {
+  optional MyMessage my_method_option = 50006;
+}
+
+option (my_file_option) = "Hello world!";
+
+message MyMessage {
+  option (my_message_option) = 1234;
+
+  optional int32 foo = 1 [(my_field_option) = 4.5];
+  optional string bar = 2;
+}
+
+enum MyEnum {
+  option (my_enum_option) = true;
+
+  FOO = 1 [(my_enum_value_option) = 321];
+  BAR = 2;
+}
+
+message RequestType {}
+message ResponseType {}
+
+service MyService {
+  option (my_service_option) = FOO;
+  option (my_service_option_map) = {
+    foo: "bar";
+  };
+
+  rpc MyMethod(RequestType) returns(ResponseType) {
+    // Note:  my_method_option has type MyMessage.  We can set each field
+    //   within it using a separate "option" line.
+    option (my_method_option).foo = 567;
+    option (my_method_option).bar = "Some string";
+  }
+}
+
+message FooOptions {
+  optional int32 opt1 = 1;
+  optional string opt2 = 2;
+}
+
+extend google.protobuf.FieldOptions {
+  optional FooOptions foo_options = 1234;
+}
+
+// usage:
+message Bar {
+  optional int32 a = 1 [(foo_options).opt1 = 123, (foo_options).opt2 = "baz"];
+  // alternative aggregate syntax (uses TextFormat):
+  optional int32 b = 2 [(foo_options) = { opt1: 123 opt2: "baz" }];
+}