bool psi_cpp_has_include(struct psi_cpp *cpp, const struct psi_token *file, unsigned flags, char *path);
bool psi_cpp_include(struct psi_cpp *cpp, const struct psi_token *file, unsigned flags);
bool psi_cpp_has_include(struct psi_cpp *cpp, const struct psi_token *file, unsigned flags, char *path);
bool psi_cpp_include(struct psi_cpp *cpp, const struct psi_token *file, unsigned flags);