93 #define TREE_DFS_FOREACH(var, root, scratch, field) \  argument
95 		(var) = (root); (var); \
97 		? ((((var)->field.tn_younger && (var) != (root)) \
100 		: ((var)->field.tn_younger && (var) != (root)) \
103 #define TREE_DFS_FOREACH_SELECTIVE(var, root, scratch, field, sel) \  argument
105 		(var) = (root); (sel = true, var); \
107 		? ((((var)->field.tn_younger && (var) != (root)) \
110 		: ((var)->field.tn_younger && (var) != (root)) \
118 #define TREE_BFS_FOREACH(var, root, scratch, field) \  argument
120 		(var) = (root); (var); \
140 #define TREE_BFS_FOREACH_SELECTIVE(var, root, scratch, field, sel) \  argument
142 		(var) = (root); (sel = true, var); \