globalAssignmentHooks -- assignment hooks for global symbols

• Usage:

  globalAssignmentHooks#s = f

• Inputs:
  • s, a symbol, a global symbol
  • f, a function, a function of two arguments, f = (sym,val) -> ...; the argument sym is the symbol whose value is about to be assigned to, and val is the value about be assigned to it
• Consequences:

  • whenever an assignment statement of the form s=e is done, the expression f(s,e) is first evaluated