Re: [Bug-apl] ⎕ES wrong message

[Juergen Sauermann]

Hi Blake,

I believe the ⎕ES related bugs reported recently should be fixed in SVN 372.

This one is not, though. The reason is that fixing it would have considerable performance
impacts (we would need a copy of every defined function argument only for the rare case that ⎕ES
is called),

I also find it somewhat arbitrary to show a non-locked function as locked in this very specific case.

Since ⎕ES is not ISO-standard anyhow, I take the freedom to trade performance for APL2 compatibility.

/// Jürgen



On 07/12/2014 06:34 PM, Blake McBride wrote:

      )CLEAR

CLEAR WS

      ∇test x

[1] x←'xx'

[2] ⎕ES 'SOME ERROR'

[3] ∇

      test '55'

SOME ERROR

      test 'xx'

      ^       ^

⎕ES is showing the modified and not the original argument passed to the function.  IBM APL 2 displays the original argument passed.

Thanks.

Blake