SWI-Prolog -- json/4

Availability::- use_module(library(http/json)).

[det]json(+Content, +Vars, +VarDict, -JSON)

The predicate json/4 implements JSON quasi quotations. These quotations produce a JSON dict that is suitable for json_write_dict/2. The quasi quoter only accepts valid, but possibly partial JSON documents. The quoter replaces content whose value is a Prolog variable that appears in the argument list of the json indicator. Notably, you can't use a Prolog variable in place of an object key. Here is an example.

  {|json(Name)||
      { "name": Name,
        "created": {
          "day":null,
          "month":"December",
          "year":2007
        },
        "confirmed":true,
        "members":[1,2,3]
      }
  |}.