static bool has_include_next(struct psi_cpp *cpp, struct psi_token *target, struct psi_plist **args, struct psi_plist **res);
static bool has_feature(struct psi_cpp *cpp, struct psi_token *target, struct psi_plist **args, struct psi_plist **res);
static bool builtin_constant_p(struct psi_cpp *cpp, struct psi_token *target, struct psi_plist **args, struct psi_plist **res);
static bool has_include_next(struct psi_cpp *cpp, struct psi_token *target, struct psi_plist **args, struct psi_plist **res);
static bool has_feature(struct psi_cpp *cpp, struct psi_token *target, struct psi_plist **args, struct psi_plist **res);
static bool builtin_constant_p(struct psi_cpp *cpp, struct psi_token *target, struct psi_plist **args, struct psi_plist **res);