Other Facilities

A good many of the features discussed in the corresponding chapter of part 1 have already come up in earlier chapters of part 2, such as own variables and EQUIVALENCE. In this chapter we tidy up some outstanding points, and briefly introduce some further features of PL/I. We start with the question of storage management. So far mention has been made of three kinds of storage attribute: AUTOMATIC, where the object goes into dynamic storage, STATIC, where it goes into static storage, and BASED, where it is superimposed over other items. It was also mentioned that there are four classes of storage, so one more remains to be described.