1# Tracing Traits Generator 2 3This directory contains an implementation of a simple codegen tool 4`tracing_traits_generator` which uses FlatBuffers reflection to inspect 5user-defined tracing schema and produces a C++ header file containing additional 6traits needed for `TracingSpan::Log<T>()` and `TracingSpan::CreateChild<T>()` to 7function properly. 8 9These traits allow for compile-time lookup of user-defined tags, additional 10attributes needed for tracking backend components to handle the data. 11 12This tool is automatically invoked during a build process with the help of 13`tracing_schema_cc_library` rule in `build/build_defs.bzl`. 14 15Examples of codegen output for various input FlatBuffers schemas can be found in 16`testdata/*.baseline` files. 17