I like the better-named arguments, but may we please keep an abstract
implementation up in Boolean anyway?

Besides being documentative (is that a word?), for a
semi-controversial change like this, it allows users to easily
configure back to standard Smalltalk implementation (non
block-supporting) by merely removing subclass selectors.  No need to
compile new source..



On Mon, Mar 26, 2018 at 6:24 PM,  <commits at source.squeak.org> wrote:
> A new version of Kernel was added to project The Inbox:
> http://source.squeak.org/inbox/Kernel-cbc.1164.mcz
>
> ==================== Summary ====================
>
> Name: Kernel-cbc.1164
> Author: cbc
> Time: 26 March 2018, 4:24:34.650291 pm
> UUID: 1db3c61f-3486-5847-bb7b-2e3409818f92
> Ancestors: Kernel-cbc.1163
>
> Removed implementation from Boolean>>xor: (made it sublcass responsibility).
> Chose a better method argument name for #xor:
>
> =============== Diff against Kernel-cbc.1163 ===============
>
> Item was changed:
>   ----- Method: Boolean>>xor: (in category 'logical operations') -----
> + xor: aBooleanOrBlock
> +       "Exclusive OR. Answer true if self is not equivalent to aBooleanOrBlock.
> +       aBooleanOrBlock is either a boolean, or evaluates to a boolean."
> - xor: aBoolean
> -       "Exclusive OR. Answer true if the receiver is not equivalent to aBoolean."
>
> +       ^self subclassResponsibility!
> -       ^(self == aBoolean) not!
>
> Item was changed:
>   ----- Method: False>>xor: (in category 'logical operations') -----
> + xor: aBooleanOrBlock
> +       "aBooleanOrBlock is either a boolean, or an object who's #value returns a boolean (usually a block)."
> +       ^aBooleanOrBlock value ifTrue: [ true ] ifFalse: [ false ]!
> - xor: aBoolean
> -       "aBoolean is either a boolean, or an object who's #value returns a boolean (usually a block)."
> -       ^aBoolean value ifTrue: [ true ] ifFalse: [ false ]!
>
> Item was changed:
>   ----- Method: True>>xor: (in category 'logical operations') -----
> + xor: aBooleanOrBlock
> +       "aBooleanOrBlock is either a boolean, or an object who's #value returns a boolean (usually a block)."
> +       ^aBooleanOrBlock value ifTrue: [ false ] ifFalse: [ true ]!
> - xor: aBoolean
> -       "aBoolean is either a boolean, or an object who's #value returns a boolean (usually a block)."
> -       ^aBoolean value ifTrue: [ false ] ifFalse: [ true ]!
>
>