The Trunk: Environments-cwp.6.mcz

> Colin Putney uploaded a new version of Environments to project The Trunk:
> http://source.squeak.org/trunk/Environments-cwp.6.mcz
>
> ==================== Summary ====================
>
> Name: Environments-cwp.6
> Author: cwp
> Time: 6 August 2012, 11:14:17.356 am
> UUID: be16cbae-4177-4a75-bded-5550c61f49dd
> Ancestors: Environments-cwp.5
>
> Made Environment class>>uninstall complain to the transcript if there is no environment installed, rather than raise an error. Also, added a comment to Environment class>>initialize to explain why we're uninstalling rather than installing.
>
> =============== Diff against Environments-cmm.4 ===============
>
> Item was changed:
>   ----- Method: Environment class>>initialize (in category 'as yet unclassified') -----
>   initialize
> +       self uninstall!
> -       self install!
>
> Item was added:
> + ----- Method: Environment class>>uninstall (in category 'as yet unclassified') -----
> + uninstall
> +       | globals sysdict |
> +       self environment class == self ifFalse:
> +               [Transcript
> +                       cr;
> +                       show: 'Can''t uninstall environments; they''re not currently installed'.
> +               ^ self].
> +
> +       globals := Smalltalk globals instVarNamed: 'contents'.
> +       sysdict := SystemDictionary new: globals size.
> +       globals associationsDo: [:ea | sysdict add: ea].
> +       Smalltalk globals becomeForward: sysdict.!