[Tcl-bugs] [ tcl-Bugs-2712377 ] info vars doesn't show object variables correctly

[SourceForge.net <no...@so...>]

Bugs item #2712377, was opened at 2009-03-25 11:52
Message generated for change (Comment added) made by dkf
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=110894&aid=2712377&group_id=10894

Please note that this message will contain a full copy of the comment thread,
including the initial issue submission, for this request,
not just the latest update.
Category: 07. Variables
Group: obsolete: 8.6b1.1
>Status: Closed
>Resolution: Fixed
Priority: 6
Private: No
Submitted By: Christian Nassau (cnassau)
Assigned to: Donal K. Fellows (dkf)
Summary: info vars doesn't show object variables correctly

Initial Comment:
The following script behaves badly:

    oo::class create test {
	variable foo bar
	method setvars {f b} {
	    set foo $f 
	    set bar $b
	}
	method dump1 {} {
	    puts <1>
	    foreach v [info vars *] {
		puts dump1:$v=[set $v]
	    }	
	}
	method dump2 {} {
	    puts <2>
	    foreach v [info vars *] {
		puts dump2:$v=[set $v]
	    }	
	    puts foo=$foo
	}
    }

    test create stuff
    stuff setvars what ever
    stuff dump1
    stuff dump2

The output is

   <1>
   <2>
   dump2:foo=what
   foo=what

I would have expected that [info vars] returns both foo and bar in both dump methods.

----------------------------------------------------------------------

>Comment By: Donal K. Fellows (dkf)
Date: 2012-04-09 10:06

Message:
Fixed for 8.6; will not backport fix to 8.5 (really a Tcl
introspection/resolver issue; can't fix from a package).

----------------------------------------------------------------------

Comment By: Donal K. Fellows (dkf)
Date: 2009-04-17 03:02

Message:
The issue is that declared variables that aren't used aren't actually
brought into the context. (That's how variable resolvers work.) Arguably
the problem is that [info vars] doesn't do a nice job with resolvers in
place, and not that TclOO "doesn't work".

----------------------------------------------------------------------

Comment By: Christian Nassau (cnassau)
Date: 2009-03-26 12:36

Message:
Here's another script that behaves strangely with respect to object
variables:

    oo::class create test {
	variable foo

	constructor {foo} {
	    set bar $foo
	    unset foo
	    my variable foo
	    set foo $bar
	}

	method dump {} {
	    puts foo=$foo
	}
    }

    test create FOO BAR
    FOO dump

Here "unset foo" fails with "can't unset "foo": no such variable". If that
line is commented out the error becomes "variable "foo" already exists"
from "my variable foo". I would have hoped that "FOO dump" produces
"foo=BAR" in the end.

Again this report refers to CVS head (which identifies itself as 8.6b1.1
with TclOO 0.6.1).




----------------------------------------------------------------------

You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=110894&aid=2712377&group_id=10894