Re: Question for the list...

[Dr . Jürgen Sauermann]

    Hi Chris,
      
      I suspect that the syntax error is caused by assigning lll twice
      and not ny localizing ⎕IO.
      
      The first assignment (which most likely happened but is not
      visible in your example) defines a function:
      
          )clear
      CLEAR WS
        
            lll←{⍳⍵⊣⎕io←0;⎕io}
            ⎕CR 'lll'
      λ←λ1 ⍵;⎕io
      λ←⍳⍵⊣⎕io←0
            
      At this point lll is a function and ⎕IO is a local variable of it.
      The second assigment raises a syntax error because vou try to
      re-define lll
      by assignment which is not allowed in GNU APL. BTW the same error
      occurs
      without localizing ⎕IO.
      
           
          lll←{⍳⍵⊣⎕io←0;⎕io}
        SYNTAX ERROR
              lll←λ1
              ^   ^
      
      Best Regards,
      Jürgen

On 8/7/20 11:27 PM, Chris Moller wrote:

>       
>       I've just discovered that you get a syntax error
>         if you try to localise a system variable in a named lambda:
>       
> > lll←{⍳⍵⊣⎕io←0;⎕io}
> >         lll 8
> >           SYNTAX ERROR
> >           lll[1]  λ←⍳⍵⊣⎕IO←0;⎕IO
> >                ^          ^
> >       
>       Is it supposed to work that way?  Or is that a bug?
>