Re: [boost] [Property tree review] Comments & layout information

From: Pavel Vozenilek (pavel_vozenilek_at_[hidden])
Date: 2006-04-26 19:34:16

"Marcin Kalicinski" wrote:

>I have an interesting idea how to preserve comments & layout information. 
>The relevant structures should be included in the tree under a special meta 
>key:
>
> Config file:
>
>    key1 data1
>    ;comment before key2
>    key2 data2  ;comment after key2, on the same line
>
> The resulting tree might look like that:
>
>    key1 data1
>    key2 data2
>    _metadata_
>    {
>        key1
>        {
>            row 1
>            column 1
>        }
>        comment "comment before key2"
>        {
>            row 2
>            column 1
>        }
>       .. etc
>    }
>

It may be needed to store also:
* location of data
* anything in between key and data (=, spaces)
* information about any transformations made by the parser
   (e.g. transparent handling of \ at the end of lines,
   escape sequences if they are used, presence
    or lack of parenthesis, their kind, numeric formatting, ...)

If one deletes a data item will the corresponding
metadata dissappear automatically?

The metadata my use different allocator than
the 'normal' data.

/Pavel