Re: [PATCH] Source properties on arbitrary non-immediate values

[Kevin Ryde]

address@hidden (Ludovic Courtès) writes:
>
>   guile> (define x 'a-symbol)
>   guile> (set-source-properties! x '((a . 2)))
>   ((a . 2))
>   guile> (source-properties x)
>   ((a . 2))

A symbol used in two places is the same object, so file/line attached
by both occurrances will overwrite, or whatever.  Ditto other uniques
like keywords, and immediates like fixnums and chars.