Variable 31 tools/greg.h typedef enum { Freed = -1, Unknown= 0, Rule, Variable, Name, Dot, Character, String, Class, Action, Predicate, Error, Alternate, Sequence, PeekFor, PeekNot, Query, Star, Plus, Any } NodeType; Variable 42 tools/greg.h struct Variable { NODE_COMMON; char *name; Node *value; int offset; };