RE: [tcltk-perl] Drop listify [PATCH]

[Jeff H. <je...@Ac...>]

> Is there a semantic difference between [list a b c] and {a b c}
> in Tcl the language?  If not, then I don't think they should be
> different when passed to perl either.

OH man, oh man ... this is sticky.  Yes and no.  At the C level,
the first is a pure list (perl AV), while the second is just a
string.  You can stringify the list and listify the string, just
as you can convert an SvPV to an AV and back.  The trick is that
in passing a Tcl_Obj to become and SV, I check the object types
first for efficient conversion (trying to reduce round-tripping
through strings, which I think you've noticed the positive
effect of).

I think that I've properly handled it with the recent changes to
call and icall.  If something is still "not right", please tell
me.  It's important to be careful, because the way that Tcl will
convert a string to a list is indifferent to extra whitespace.
The following all represent the same thing in when listified:

set var {a    b    c}
set var {  a b c  }
set var {a
b
c}

Jeff