api notes

GSoC 2026: Extending Clang API Notes for C++: Overload-Specific Annotations for Functions and Methodsllvm.org

Clang’s API Notes now support overload‑specific selectors via a new optional `Where` block that can match parameter lists and implicit object qualifiers. The implementation adds YAML parsing, binary serialization, Sema integration and diagnostics while preserving existing name‑only behavior.