Comment #11 on issue 187 by ken...@google.com: Command-line argument to
override the "optimize_for" option
http://code.google.com/p/protobuf/issues/detail?id=187
Hi all,
Attached is a little protoc plugin written in Python which converts all the
inputs to LITE_RUNTIME -- including renaming so that they do not conflict
-- and then passes them on to some other plugin. See readme.txt in the
archive for details. Basically with this you can do:
protoc --litify_out=cpp:. foo.proto
And this will produce foo_lite.pb.h and foo_lite.pb.cc, which contain foo's
types compiled with optimize_for=LITE_RUNTIME. You can do Java too:
protoc --litify_out=java:. foo.proto
You can easily modify this plugin's code to produce any arbitrary
transformation you want. It's just a Python script that processes the
FileDescriptorProtos representing the inputs.
I like this approach because it is completely general. There is nothing
that you can't express in a Turing-complete language. In contrast, *none*
of the other proposals made so far can express even what this simple plugin
does (in particular no one has proposed a solution for the renaming part).
I also like that this requires no modification whatsoever to protoc. Not
just because I want to avoid work, but because keeping the code code as
simple as possible ensures that it retains agile.
What do you think?
Attachments:
litify.tar.gz 4.1 KB
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