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Clarify that FlatBuffers unions do not support scalars (#6416)

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I mention that a common practice is to wrap the scalar value in a table
or a struct.

Signed-off-by: Juan Cruz Viotti <jv@jviotti.com>
This commit is contained in:
Juan Cruz Viotti
2021-01-21 20:08:29 -04:00
committed by GitHub
parent 4aff1198dd
commit 7b1ee31d80
1 changed files with 5 additions and 3 deletions
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8
docs/source/Schemas.md
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@@ -211,9 +211,11 @@ If you have a need to distinguish between different FlatBuffers in a more
open-ended way, for example for use as files, see the file identification
feature below.
There is an experimental support only in C++ for a vector of unions
(and types). In the example IDL file above, use [Any] to add a
vector of Any to Monster table.
There is an experimental support only in C++ for a vector of unions (and
types). In the example IDL file above, use [Any] to add a vector of Any to
Monster table. There is also experimental support for other types besides
tables in unions, in particular structs and strings. There's no direct support
for scalars in unions, but they can be wrapped in a struct at no space cost.
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