Recursive dependent definition of containers. about mlib

[P-p-H-d]

In fact, it is already possible to do it through an additional level of indirection and it is not very hard to do:

    #include "m-array.h"
    #include "m-dict.h"
    #include "m-string.h"
    #include "m-variant.h"
    
    typedef struct json_node_s *json_t;
    extern void json_init (json_t *);
    extern void json_clear (json_t);
    extern void json_init_set (json_t *, json_t);
    extern void json_set (json_t *, json_t);
    #define JSON_OPLIST (INIT(json_init M_IPTR), CLEAR(json_clear),         \
                 INIT_SET(json_init_set M_IPTR), SET(json_set M_IPTR))
    
    DICT_DEF2(json, string_t, STRING_OPLIST, json_t, JSON_OPLIST)
    ARRAY_DEF(json, json_t, JSON_OPLIST)
    VARIANT_DEF2(variant_json,    
         (integer, int, M_DEFAULT_OPLIST),  
         (real, float, M_DEFAULT_OPLIST),
         (array, array_json_t, ARRAY_OPLIST(json, JSON_OPLIST)), 
         (dict, dict_json_t, DICT_OPLIST(json, STRING_OPLIST, JSON_OPLIST)))
    
    struct json_node_s {
      variant_json_t json;
    };