tree d4bc8c57759160ba98f3d0cf5f9740dbbb85e4ef
parent 31c5f73ec1277818e9dceb81a4b28cb3d185f60c
author Adam Cozzette <acozzette@google.com> 1730830897 -0800
committer Copybara-Service <copybara-worker@google.com> 1730831075 -0800

Rust C++: remove per-message functions for repeated fields

This CL deletes the per-message C++ functions for operating on repeated fields
and replaces them with functions in the runtime that can work with arbitrary
messages.

Similar to what we did with maps, this required refactoring the code to make it
work with `RepeatedPtrFieldBase`, the untyped base class of
`RepeatedPtrField<T>`. I added a `RustRepeatedMessageHelper` class to allow us
access to the protected methods we need.

This should save a bit of linker input code size, but I think more importantly
we are going to need this eventually to enable tree shaking to work well.

PiperOrigin-RevId: 693394959