adjust

Author: a

src/utils.jl

@@ -2,15 +2,15 @@
   is_operation(f)
 
 Returns a single argument anonymous function predicate, that returns `true` if and only if
-the argument to the predicate satisfies `istree` and `operation(x) == f` 
+the argument to the predicate satisfies `iscall` and `operation(x) == f` 
 """
-is_operation(f) = @nospecialize(x) -> istree(x) && (operation(x) == f)
+is_operation(f) = @nospecialize(x) -> iscall(x) && (operation(x) == f)
 export is_operation
 
 
 """
   node_count(t)
-Count the nodes in a symbolic expression tree satisfying `istree` and `arguments`.
+Count the nodes in a symbolic expression tree satisfying `isexpr` and `arguments`.
 """
-node_count(t) = istree(t) ? reduce(+, node_count(x) for x in arguments(t), init = 0) + 1 : 1
+node_count(t) = isexpr(t) ? reduce(+, node_count(x) for x in children(t); init=0) + 1 : 1
 export node_count