+size_t cdecl__explain_specs(char *buf, size_t n, struct cdecl_declspec *s,
+ unsigned mask);
+size_t cdecl__explain_pre_specs(char *buf, size_t n, struct cdecl_declspec *s);
+size_t cdecl__explain_post_specs(char *buf, size_t n, struct cdecl_declspec *s);