Extensions are not supported in proto3 with the exception of custom options for Protobuf itself, that is correct.
On Tue, May 19, 2020, 5:41 AM 'Jack Lu' via Protocol Buffers < [email protected]> wrote: > In the developer doc: > https://developers.google.com/protocol-buffers/docs/proto3#custom_options, > it mentions the following: > > Protocol Buffers also allows you to define and use your own options. This > is an *advanced feature* which most people don't need. If you do think > you need to create your own options, see the Proto2 Language Guide > <https://developers.google.com/protocol-buffers/docs/proto#customoptions> for > details. Note that creating custom options uses extensions > <https://developers.google.com/protocol-buffers/docs/proto#extensions>, > which are permitted only for custom options in *proto3.* > > Should the last word "proto3" be "proto2"? > > Thanks, > -Jack > > -- > You received this message because you are subscribed to the Google Groups > "Protocol Buffers" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/protobuf/63f86d56-0ff2-4ba7-9da8-67ddcc11e8be%40googlegroups.com > <https://groups.google.com/d/msgid/protobuf/63f86d56-0ff2-4ba7-9da8-67ddcc11e8be%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "Protocol Buffers" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/protobuf/CAD7-yfsc-vBqE6yMRs5wuB2ELrx-yCDM%2Bz1Y1gsmBY5T9UpRJw%40mail.gmail.com.
