The majority of gRPC's C++ requirements are drawn from the [Google C++ style guide] (https://google.github.io/styleguide/cppguide.html). Additionally, as in C, layout rules are defined by clang-format, and all code should be passed through clang-format. A (docker-based) script to do so is included in [tools/distrib/clang_format_code.sh] (../tools/distrib/clang_format_code.sh).