Extended State Indicator R←⎕XSI

R is a nested vector of character vectors giving the full path names of the functions or operators in the execution stack. Note that if a function has changed space, its original (home) space is reported, rather than its current one.

Example

In the following, function foo in namespace x has called goo in namespace y. Function goo has then changed space (⎕CS) to namespace z where it has been suspended:

      )SI
[z] y.goo[2]*
x.foo[1]

⎕XSI reports the full path name of each function:

       ⎕XSI
 #.y.goo  #.x.foo

This can be used for example, to edit all functions in the stack, irrespective of the current namespace by typing: ⎕ED ⎕XSI