gen
Iterators for OCaml, both restartable and consumable
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read filename f opens filename and calls f g, where g is a clonable generator of characters from the file. It can be cloned by calling g#save (which saves the position in the file), and used with g#next. Distinct clones of g shouldn't be used at the same time (otherwise Failure _ will be raised). Both the generator and save points are only valid within the scope in which f is called.