> I am looking at
>
> ifTrue: alternativeBlock
> "If the receiver is false (i.e., the condition is false), then the value is
> the
> false alternative, which is nil. Otherwise answer the result of evaluating
> the argument, alternativeBlock. Create an error notification if the
> receiver is nonBoolean. Execution does not actually reach here because
> the expression is compiled in-line."
>
> self subclassResponsibility
>
> In order to perform the block, ifTrue must somehow end up evaluating the
> block, but this code only sends a subclassResponsibility message to itself
> and implicitly returns itself.
>
> Where does the block actually get evaluated?
>
>