Support for JSONC (JSON with Comments)

Question

Today it is not possible to use Support for JSONC (JSON with Comments).

For example, the below results in an error:

@startjson
{
  "firstName": "John",
  "lastName": "Smith",
  "isAlive": true, // True when alive
}
@endjson

Comments

Here is only a minor remark:

Without the last comment, beware to the last comma:

Compare:

@startjson
{
  "firstName": "John",
  "lastName": "Smith",
  "isAlive": true,
}
@endjson

and:

@startjson
{
  "firstName": "John",
  "lastName": "Smith",
  "isAlive": true
}
@endjson

Regards.

---

Agreed, but the comment still does not show up.

Answer 1

Do you expect PlantUML to simply ignore comments (that is, ignore 'True when alive') ?

Or do you expect PlantUML to put a note on "isAlive" ?

Comments

Hi all,

Perhaps the both, depending of a global flag or a global parameter.... (to avoid printing a comment when it is not necessary)...

Then for the development:

• 1. First accept JSONC and ignore comment
  Now implemented :

@startjson
{
  "firstName": "John",
  "lastName": "Smith",
  "isAlive": true // True when alive
}
@endjson

• 2. Then accept JSONC and print comment (or not depending of a flag/param)...

FYI, I update also:

• https://github.com/plantuml/plantuml/issues/831

Regards.

Answer 2

JSON Comments are not part of the standard. https://datatracker.ietf.org/doc/html/rfc8259

Should really be worked through IETF standards process for industry compatibility.