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author | Romain Forlot <romain.forlot@iot.bzh> | 2017-05-19 16:20:02 +0200 |
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committer | Romain Forlot <romain.forlot@iot.bzh> | 2017-05-19 16:20:02 +0200 |
commit | 2d574dc77f68ecb5150016989900860e8b74be50 (patch) | |
tree | d691a8345a58dcd080131c58d028f77df51a45ed /CAN-binder/libs/nanopb/examples/using_union_messages/unionproto.proto | |
parent | 48a2605965af1f05ba7f01f6e8c1758a4c9b0522 (diff) | |
parent | 278ffb890e3d8722e4c7d824baaf221a1e375fc4 (diff) |
Add 'CAN-binder/libs/nanopb/' from commit '278ffb890e3d8722e4c7d824baaf221a1e375fc4'
git-subtree-dir: CAN-binder/libs/nanopb
git-subtree-mainline: 48a2605965af1f05ba7f01f6e8c1758a4c9b0522
git-subtree-split: 278ffb890e3d8722e4c7d824baaf221a1e375fc4
Diffstat (limited to 'CAN-binder/libs/nanopb/examples/using_union_messages/unionproto.proto')
-rw-r--r-- | CAN-binder/libs/nanopb/examples/using_union_messages/unionproto.proto | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/CAN-binder/libs/nanopb/examples/using_union_messages/unionproto.proto b/CAN-binder/libs/nanopb/examples/using_union_messages/unionproto.proto new file mode 100644 index 00000000..209df0d2 --- /dev/null +++ b/CAN-binder/libs/nanopb/examples/using_union_messages/unionproto.proto @@ -0,0 +1,32 @@ +// This is an example of how to handle 'union' style messages +// with nanopb, without allocating memory for all the message types. +// +// There is no official type in Protocol Buffers for describing unions, +// but they are commonly implemented by filling out exactly one of +// several optional fields. + +syntax = "proto2"; + +message MsgType1 +{ + required int32 value = 1; +} + +message MsgType2 +{ + required bool value = 1; +} + +message MsgType3 +{ + required int32 value1 = 1; + required int32 value2 = 2; +} + +message UnionMessage +{ + optional MsgType1 msg1 = 1; + optional MsgType2 msg2 = 2; + optional MsgType3 msg3 = 3; +} + |