7 Arrays

 

There are two essential differences between S1 and SK arrays. The functionality can be seen to be the same, although the way some uses are expressed can be seen to be quite different; for example, SK builds in higher-dimensioned arrays, while S1 constructs them as ordinary library classes.

1. S1 only allows a single contiguous primitive array portion, obtained by including (or ). Higher dimensional arrays and objects with multiple conceptual array portions are then constructed as library classes.

   Instead of including a distinguished class, SK uses value-typed array attributes. (The same could have been done in S1, except value-typed arrays have constant size in S1. This constraint was inherited from C's equivalent restriction on structs.)

2. In SK, dimensionality becomes part of the type name. and sugar are not permitted unless the class name contains [*,*] notation. Dynamic value arrays and static value arrays allow only one dimension. In this case of and flexible reference arrays , the dimension is part of the type. Instead of using a *, integer constants are also allowed. For the type, only distinguishes the value of those constants. E.g. and different types, while and are equal types.