Converting C source to C++

Question

How would you go about converting a reasonably large (>300K), fairly mature C codebase to C++?

The kind of C I have in mind is split into files roughly corresponding to

Answer 1

You mention that your tool is a compiler, and that: "Actually, pattern matching, not just type matching, in the multiple dispatch would be even better".

You might want to take a look at maketea. It provides pattern matching for ASTs, as well as the AST definition from an abstract grammar, and visitors, tranformers, etc.