[Pharo-users] New compiler: variable and recursive bloc of code

Sept. 10, 2014

      Hello,

I noticed this change described bellow and I just want to have 
confirmation about it:

The new Pharo 2.0 compiler need to have variable assigned with a value 
before it used in a recursive bloc of code. Of course it is a bit 
inelegant. Or is it something else and does it need to be reported?

Thanks to let me know

Hilaire

For example this Dr. Geo code break in Pharo 2.0:

| triangle c |
triangle := [:s1 :s2 :s3 :n |
     c segment: s1 to: s2;
         segment: s2 to: s3;
         segment: s3 to: s1.
     n > 0 ifTrue:
         [triangle
             value: s1
             value: (c middleOf: s1 and: s2) hide
             value: (c middleOf: s1 and: s3) hide
             value: n-1].
     [...]
].

It must be changed to:

| triangle c |
triangle := []. <= CHANGE HERE
triangle := [:s1 :s2 :s3 :n |
     c segment: s1 to: s2;
         segment: s2 to: s3;
         segment: s3 to: s1.
     n > 0 ifTrue:
         [triangle
             value: s1
             value: (c middleOf: s1 and: s2) hide
             value: (c middleOf: s1 and: s3) hide
             value: n-1].
     [...]
].

-- 
Dr. Geo - http://drgeo.eu
iStoa - http://istao.drgeo.eu