I read that Blocks in Squeak and Pharo, since it was derived from Squeak
did not implement true block closures and would not support block
recursion. On one count the statement was correct, but not on the other.
I tried:
| a f |
a := 0.
f := [ Transcript show: a. (a < 5)ifTrue:[a := a + 1. f value ] ].
f value.
a inspect.
A Workspace DoIt did not work in Squeak, it failed complaning that the
block was being evaluated. In Pharo, it works but with the annoying
modal dialog asking to run since f was not assigned a value. If blocks
are to be used recursively, a better way must be found to flag but not
stop execution.
This example points out that porting from Squeak to Pharo is fine, but
the reverse might be questionable.
bw
