Proper or well formed Lists

Francesco Cesarini <>
Thu Dec 14 10:35:48 CET 2000

Ulf Wiger wrote:
> Well, one possible use of non-well-formed lists was explored a while
> ago on erlang-questions: lazy lists:

Yupp, but the creation of lazy lists became possible with the Erlang 4.4
extensions (in 95/96) when Funs where added to the language. I was
wondering over the reasons behind the decision, as it was taken before

Francesco Cesarini

Erlang/OTP consultant
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