Hi, on a related note, you can discard the "ERROR: i not defined" error because it turned out to be an error in a predicate, unrelated to Task and the iterator. (I am surprised it did not provide line numbers for this but maybe it was inlined/optimized.)
The Task/iterators now work from the REPL but the hanging issue files remains when I call "julia.exe bug1.jl". Thanks for your help, Sebastian On Tuesday, 1 July 2014 20:05:48 UTC+1, Sebastian Nowozin wrote: > > > Hi everyone, > > I followed the pattern proposed at > http://slendermeans.org/julia-iterators.html (see the "fibtask" function) > in order to define an iterator that is traversing a tree data structure as > follows: > > function search(rt::Tree) > function _search(node::InteriorNode) > for cn in node.children > _search(cn) > end > end > function _search(node::LeafNode) > for obj in node.children > produce(obj.membervar) > end > end > function _search() > _search(rt.root) > end > Task(_search) > end > > This function dispatches based on the type of node (interior or leaf) and > iterates over objects stored with each leaf node of the tree (it is a > B-tree). Eventually I would like to write statements such as: > > for leaf in search(tree) > ... > end > > I tested the above code on both Windows 8.1 with latest 64 bit build as > well as on Ubuntu 14.04 git trunk, with code as follows: > > S = search(tree) > L = collect(S) > > This yields the following error, with line 25 being the collect statement: > > ERROR: i not defined > in schedule_and_wait at task.jl:251 > in consume at task.jl:162 > in collect at array.jl:233 > in collect at array.jl:240 > in include at ./boot.jl:244 > in include_from_node1 at loading.jl:128 > in process_options at ./client.jl:285 > in _start at ./client.jl:354 > while loading test_tree1.jl, in expression starting on line 25 > > Is the above an invalid use of the Task interface? If so, what are the > constraints on the produce statements, and how to fix the above code? > > Any help is appreciated. If it would help I could open an issue on the > Julia issue tracker. > > Thanks, > Sebastian > >
