Sun Performance and Tuning: Java™ and the Internet, Second Edition

Structures

SymbEL supports the aggregate type struct, which is similar to the C variety, with some exceptions. An aggregate is a collection of potentially dissimilar objects collected into a single group. As it turns out, most of the SymbEL code developed will contain structures.

As an example, here is what a SymbEL password file entry might look like.

struct passwd {
  string pw_name; 
  string pw_passwd; 
  long   pw_uid; 
  long   pw_gid; 
  string pw_age; 
  string pw_comment; 
  string pw_gecos; 
  string pw_dir; 
  string pw_shell; 
};

The declaration of structure variables differs from C in that the word struct is left out of the variable declaration. So, to declare a variable of type struct passwd, only passwd would be used.

Accessing Structure Members

You access ...