Exercises

Here are some simple questions and exercises that you might want to play around with by yourself:

1. Though most of the time Tokens are harvested from provided source code, in some cases, Tokens might be generated dynamically inside the Preprocessor. For example, the __LINE__ built-in macro is expanded to the current line number, and the __DATE__ macro is expanded to the current calendar date. How does Clang put that generated textual content into the source code buffer of SourceManager? How does Clang assign SourceLocation to these tokens?
2. When we were talking about implementing a custom PragmaHandler, we were leveraging Preprocessor::Lex to fetch Tokens followed after the pragma name, until we hit the eod token kind. Can we keep lexing beyond the eod token? What interesting things will you do if you can consume arbitrary tokens after the #pragma directive?
3. In the macro guard project from the Developing custom preprocessor plugins and callbacks section, the...