code: def global_variable_action(self, text, loc, var):
          
          exshared.setpos(loc, text)
          if DEBUG > 0:
              print("GLOBAL_VAR:",var)
              if DEBUG == 2: self.symtab.display()
              if DEBUG > 2: return
          index = self.symtab.insert_global_var(var.name, var.type)
          self.codegen.global_var(var.name)
          return index
docs: Code executed after recognising a global variable