previous_program
NAME
previous_program - return the previous program
SYNOPSIS
varargs string previous_program(int n)
DESCRIPTION
Return the name of the object with the function
n+1 (default: 1) steps
back in the function call chain. If the number of steps is larger than
the number of function calls involved, zero is returned.
SEE ALSO
HTMLised 1998 Greg Lewis
(glewis@maths.adelaide.edu.au)