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How do you you iterate through a mutable repeated Protocol Buffer field using a range-based for loop in C++?
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Yes, repeated fields retain the order of items.
repeated : this field can be repeated any number of times (including zero) in a well-formed message. The order of the repeated values will be preserved.
The Protobuf serialization mechanism is given through the protoc application, this compiler will parse the . proto file and will generate as output, source files according to the configured language by its arguments, in this case, C++. You can also obtain more information about, reading the section compiler invocation.
RepeatedField and RepeatedPtrField are used by generated protocol message classes to manipulate repeated fields. These classes are very similar to STL's vector, but include a number of optimizations found to be useful specifically in the case of Protocol Buffers.
Use a reference:
for (MyProto &my_proto : *container->mutable_my_protos()) {…}
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