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Diffstat (limited to 'docs/migration.rst')
| -rw-r--r-- | docs/migration.rst | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/docs/migration.rst b/docs/migration.rst index 5f7246f5..d5ded643 100644 --- a/docs/migration.rst +++ b/docs/migration.rst @@ -11,6 +11,25 @@ are included, in order to make it easier to find this document. .. contents :: +Nanopb-0.3.2 (2015-01-xx) +========================= + +Add support for OneOfs +---------------------- +**Rationale:** Previously nanopb did not support the *oneof* construct in +*.proto* files. Those fields were generated as regular *optional* fields. + +**Changes:** OneOfs are now generated as C unions. Callback fields are not +supported inside oneof and generator gives an error. + +**Required actions:** The generator option *no_unions* can be used to restore old +behaviour and to allow callbacks to be used. To use unions, one change is +needed: use *which_xxxx* field to detect which field is present, instead +of *has_xxxx*. Compare the value against *MyStruct_myfield_tag*. + +**Error indications:** Generator error: "Callback fields inside of oneof are +not supported". Compiler error: "Message" has no member named "has_xxxx". + Nanopb-0.3.0 (2014-08-26) ========================= |