iterate

Creates a new sequential seq, which each element is generated by the given next function applied to the previous element, and the initial element is the seed. The seq terminates when pred(item) returns false.

The returned seq is similar to the for-loop below:

for (G item = seed; pred(item); item = next(item)) {
		// Operations on the item.
}

Parameters:

seed	the initial element
pred	a predicate function to determine when the seq terminates
next	a mapping function to produce a new element by applying to the previous element
env	a task environment. If not specified, TaskEnv.get_common_task_env is used.

Returns:

the result seq