Abusing C to implement JSON Parsing with Struct Methods | Lobsters

19

Abusing C to implement JSON Parsing with Struct Methods c xnacly.me
via bitfield 10 days ago | caches
Archive.org Archive.today Ghostarchive
| 5 comments

5

1. 3
  
  wrs 10 days ago
  
  Why bother to do the function pointers in members thing if you have to pass self as an argument anyway? Instead of json->advance(json), just do json_advance(json).
  1. 1
    
    xnacly edited 9 days ago
    
    For the sake of thinkering, attaching functions to structures and using these methods
2. 2
  
  yoshi 10 days ago
  
  the most surprising thing I got out of this post was the existence of the # preprocessor operator. I didn’t know this existed! led me to review the directives in the standard. neat stuff.
  1. 2
    
    wrs 10 days ago
    
    You can indeed do some crazy syntax hacking with that feature! BTW, the example is wrong — it does actually give you the JSON string you’d expect.
    1. 1
      
      xnacly 9 days ago
      
      I missed the {} inside of the resulting string but yes it returns the exact input only stringified:
      
      char *raw_json = JSON({ "array" : [ [], {}] });
      
      This expands into:
      
      char *raw_json = "{ \"array\" : [[], {}] }";