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Diffstat (limited to 'docs/concepts.rst')
| -rw-r--r-- | docs/concepts.rst | 5 |
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diff --git a/docs/concepts.rst b/docs/concepts.rst index 1f9aec1..168e564 100644 --- a/docs/concepts.rst +++ b/docs/concepts.rst @@ -317,6 +317,11 @@ The user is expected to set the filed manually using the correct field tag:: Notice that neither ``which_payload`` field nor the unused fileds in ``payload`` will consume any space in the resulting encoded message. +When a C union is used to represent a ``oneof`` section, the union cannot have +callback fields or nested callback fields. Otherwise, the decoding process may +fail. If callbacks must be used inside a ``oneof`` section, the generator +option *no_unions* should be set to *true* for that section. + .. _`oneof`: https://developers.google.com/protocol-buffers/docs/reference/proto2-spec#oneof_and_oneof_field Extension fields |