Error message for field modifier inside oneof block

[cconroy]

When I use a oneof with this plugin, it reports a syntax error on the last field.

e.g.

message Foo {
  oneof bar {
    optional string baz = 1;
    optional int32 fizz = 2;
  }
}

It reports: "extraneous input fizz, expecting '='"

Plugin version 0.8

see: https://developers.google.com/protocol-buffers/docs/reference/java-generated#oneof-fields

[kshchepanovskyi]

You cannot use optional, required or repeated field modifiers inside of an oneof block.
The only thing to improve here is error message.

https://developers.google.com/protocol-buffers/docs/proto#oneof

[cconroy]

Doh! Good call. Thanks!