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I am looking for an LTO tape library. Do you have one to spare?
Commit found by message id
Sun, 8 May 2011
[ 19:08:19 ashish ] Original commit 
hs-enumerator devel files touched by this commit Reliable, high-performance processing with left-fold enumerators
Typical buffer-based incremental I/O is based around a single loop,
which reads data from some source (such as a socket or file), transforms
it, and generates one or more outputs (such as a line count, HTTP
responses, or modified file). Although efficient and safe, these loops are
all single-purpose; it is difficult or impossible to compose
buffer-based processing loops.

Haskell's concept of "lazy I/O" allows pure code to operate on data from an
external source. However, lazy I/O has several shortcomings. Most notably,
resources such as memory and file handles can be retained for arbitrarily
long periods of time, causing unpredictable performance and error conditions.

Enumerators are an efficient, predictable, and safe alternative to lazy
I/O. Discovered by Oleg Kiselyov, they allow large datasets to be processed
in near constant space by pure code. Although somewhat more complex
to write, using enumerators instead of lazy I/O produces more correct

This library contains an enumerator implementation for Haskell, designed to
be both simple and efficient.


Approved by:    pgj (mentor)
Obtained from:  FreeBSD Haskell

Number of ports [& non-ports] in this commit: 1

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import 1.1 View revision /ports/head/devel/hs-enumerator/Makefile
import 1.1 View revision /ports/head/devel/hs-enumerator/distinfo
import 1.1 View revision /ports/head/devel/hs-enumerator/pkg-descr
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