Macro for generating nullability typedefs

nullability_typedefs.h

#ifndef NULLABILITY_TYPEDEFS_H
#define NULLABILITY_TYPEDEFS_H

#define MAKE_NULLABILITY_TYPEDEFS(type, name)                                                       \
    typedef const type *const _Nonnull name##_pure_ptr;                                            \
    typedef const type *_Nonnull name##_const_ptr;                                                 \
    typedef type *_Nonnull name##_ptr;                                                             \
    typedef type *_Nullable name##_null_ptr;                                                       \
    typedef const type *const _Nullable name##_pure_null_ptr;                                      \
    typedef type *_Nonnull *_Nonnull name##_ptr_ptr;                                               \
    typedef type *_Nullable *_Nullable name##_null_ptr_ptr;
   
MAKE_NULLABILITY_TYPEDEFS(char, char)
MAKE_NULLABILITY_TYPEDEFS(struct timeval, timeval)

#endif