Hi,
in ISO they are called ⎕STOP and ⎕TRACE.
Both variants S∆/T∆ and ⎕STOP/⎕TRACE are now implemented n GNU APL.
For some reason S∆ and T∆ are case sensitive while ⎕STOP and ⎕TRACE are not.
/// Jürgen
On 04/06/2014 09:56 AM, David B. Lamkins wrote:
Oops. Never mind. That's an IBM-ism; not part of ISO APL.
On Sat, 2014-04-05 at 23:20 -0700, David B. Lamkins wrote:
A suggestion:
For compatibility with APL2, reserve names beginning with t∆ and s∆. GNU
APL should indicate that trace and stop control are unimplemented when
attempting to set such names to anything other than a numeric vector or
an empty vector.
