Inject comments

[flaviojs]

I'd like the ability to inject comments into a json string.
This is the right crate to put it, based on the name.

Details:

I have configuration files that have comments.
The files are meant to be edited manually (text editor) or in a launcher program.

I already mentioned that it's invalid json but the reply I got is that they chose RapidJSON exactly because it allowed that.
The launcher is C++ (GUI) mixed with rust code.

Right now all the comments that guide a user disappear when the launcher writes to the config file.
This is an obvious usability problem, so I want to make the launcher write default comments with the config.

As a minimal example, I want to turn this:

{
  "ms_per_game_cycle": 25
}

into this:

{
  // Number of milliseconds for one game cycle. Default: 25
  "ms_per_game_cycle": 25
}

[tmccombs]

I'd be good with adding that functionality, although I'm not entirely sure what that would looke like? Do you have any ideas on the design of the feature, or even a rough idea of what you would like the API to look like?