August 2011 - Libraries

ANNOUNCE: yap-0.0 - yet another prelude
by Paterson, Ross 15 Aug '11

15 Aug '11

Yet another restructuring of the Prelude numeric classes on algebraic lines, proposed for a revision of the Haskell Prelude: http://hackage.haskell.org/package/yap-0.0 It is less ambitious and more simplistic than other algebraic class hierarchies, but it aims to preserve backward compatibility for clients of the existing classes, and avoids multiple parameter type classes. Of course defaulting is affected (this would be fixed if this proposal became part of the language) and definitions of instances will be different (but this is where the existing hierarchy is most problematic). The core of the package is the new class hierarchy, but it also has some example instances, including for the existing types Complex and Ratio. It is simplistic, but enough to allow fields like Ratio (Polynomial (Ratio (Complex Integer))).

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darcs patch: Remove haskell98 dependency.
by Adam Sampson 13 Aug '11

13 Aug '11

Hi, I'm just rebuilding libraries against GHC 7.2; here's a patch to make haskell-src build (since libraries@ is the maintainer). Thanks, -- Adam Sampson <ats(a)offog.org> <http://offog.org/> 1 patch for repository http://code.haskell.org/haskell-src: Sat Aug 13 22:53:08 BST 2011 Adam Sampson <ats(a)offog.org> * Remove haskell98 dependency. Recent versions of Happy don't require it any more.

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There are too many error handling conventions used in library code!
by dons＠cse.unsw.edu.au 13 Aug '11

13 Aug '11

This article on the 8 different error handling strategies various common Haskell libs use: http://www.randomhacks.net/articles/2007/03/10/haskell-8-ways-to-report-err… got me thinking: we need to standardise/recommend a small set of methods for library error handling. The lack of consistent error reporting between libs results in verbose code, as we're not able to use a single error handling technique when gluing together code from different libs (i.e. we can't just use Maybe or Either/ErrorT). (It's always nice when you *can* use, say, a Maybe monad to glue code from a number of sources, but eventually you reach code with a different error system, and the Maybe monad breaks down). So, some questions I think we can tackle: * can we identify error handling strategies from the list that should not be used anymore? (throwDyn?) * can we move some of the outlying libraries to a more consistent error framework? * do we need more support for gluing together our different error systems? (it should be easier to glue code using , say, Maybe/Either). * what role does MonadError play here, as a generic error handler? * can we make precise recommendations about which error strategies to use? -- Don

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[PATCH] Add deprecations status of unGetChan and isEmptyChan to Haddock comment
by Simon Hengel 09 Aug '11

09 Aug '11

--- Control/Concurrent/Chan.hs | 12 ++++++++++-- 1 files changed, 10 insertions(+), 2 deletions(-) diff --git a/Control/Concurrent/Chan.hs b/Control/Concurrent/Chan.hs index 23b21bb..2906367 100644 --- a/Control/Concurrent/Chan.hs +++ b/Control/Concurrent/Chan.hs @@ -109,7 +109,11 @@ dupChan (Chan _ writeVar) = do newReadVar <- newMVar hole return (Chan newReadVar writeVar) --- |Put a data item back onto a channel, where it will be the next item read. +-- |Note: This operation is deprecated. +-- If you need this operation, use "Control.Concurrent.STM.TChan" instead. See +-- <http://hackage.haskell.org/trac/ghc/ticket/4154> for details. +-- +-- Put a data item back onto a channel, where it will be the next item read. unGetChan :: Chan a -> a -> IO () unGetChan (Chan readVar _) val = do new_read_end <- newEmptyMVar @@ -118,7 +122,11 @@ unGetChan (Chan readVar _) val = do return new_read_end {-# DEPRECATED unGetChan "if you need this operation, use Control.Concurrent.STM.TChan instead. See http://hackage.haskell.org/trac/ghc/ticket/4154 for details" #-} --- |Returns 'True' if the supplied 'Chan' is empty. +-- |Note: This operation is deprecated. +-- If you need this operation, use "Control.Concurrent.STM.TChan" instead. See +-- <http://hackage.haskell.org/trac/ghc/ticket/4154> for details. +-- +-- Returns 'True' if the supplied 'Chan' is empty. isEmptyChan :: Chan a -> IO Bool isEmptyChan (Chan readVar writeVar) = do withMVar readVar $ \r -> do -- 1.7.4.1

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FYI: Current hackage-registered libraries which exclude base-4.4 from GHC 7.2
by Herbert Valerio Riedel 09 Aug '11

09 Aug '11

Hello GHC Users, Below is a list compiled from my current index-00.tar listing 292 packages whose version constraints on `base` seem (since I used a very simple Haskell script, I expect there to be some false positives) to exclude the `base` package version 4.4.0.0 bundled with GHC 7.2.1-rc1. Other changes that need to be considered when trying to fix packages for compilation w/ GHC 7.2: - integer-gmp has been updated to 0.3.0.0 - BangPatterns are not enabled by default anymore w/ GHC 7.2 - TypeSynonymInstances don't overlap w/ FlexibleInstances anymore - Data.Typeable API has changed (this breaks `uniplate` for instance) Package name Package Vers. ===================================================================================== 4Blocks 0.2 (base req: >=2 && <=4) AERN-Basics 2011.1.0.1 (base req: >=4 && <4.3) AERN-Net 0.2.1.1 (base req: >=3 / <4) AERN-Real 2011.1.0.1 (base req: >=4 && <4.3) AERN-Real-Double 2011.1.0.2 (base req: >=4 && <4.3 / >=4 && <5) AERN-Real-Interval 2011.1.0.1 (base req: >=4 && <4.3) AERN-RnToRm 0.5.0.1 (base req: >=3 / <4) AERN-RnToRm-Plot 0.2.0.3 (base req: >=3 / <4) Advgame 0.1.2 (base req: >=3 && <=4.1) Annotations 0.1.3 (base req: >=4.1 && <4.4) Attrac 0.1.3 (base req: >=2 && <4) BirdPP 1.0 (base req: >=2 && <4) BlogLiterately 0.3 (base req: >=4.0 && <4.3) ChasingBottoms 1.3.0.1 (base req: >=4.0 && <4.4) Coadjute 0.1.1 (base req: >=4 && <4.4) ConfigFileTH 0.1 (base req: >=4.2 && <4.3) ContArrow 0.0.5 (base req: <=4) DBlimited 0.1.1 (base req: >=2 && <4) DP 0.1.1 (base req: <=4.0) Decimal 0.2.0 (base req: ==4) DocTest 0.2.0 (base req: >=4.0 && <4.4) DrIFT-cabalized 2.2.3.2 (base req: <4) Encode 1.3.4 (base req: <=4.2) GenI 0.20.2 (base req: >=3 && <4) GlomeTrace 0.1.2 (base req: >=3 && <4) GlomeVec 0.1.2 (base req: >=3 && <4) Grempa 0.1.3 (base req: ==4.2.* || ==4.3.*) HDRUtils 1.0.2 (base req: ==4.1.0.0) HLogger 0.0.1.0 (base req: >=2 && <4) HPath 0.0.2 (base req: >=2 && <=4) HPlot 0.3 (base req: >=4.0 && <4.2) HTTP 4000.1.1 (base req: >=2 && <4.4) HXMPP 0.0.1.0 (base req: >=2 && <4) HaRe 0.6.0.1 (base req: >=4 && <=4.2.0.2 / >4 && <=5) HarmTrace 0.4 (base req: >=4.2 && <4.4) Hashell 1.0 (base req: ==3.*) Hieroglyph 3.89 (base req: ==4.1.0.0) Hricket 0.1 (base req: >=3 && <=4) HsHyperEstraier 0.4 (base req: ==4.3.*) HsSVN 0.4.3.2 (base req: ==4.3.*) IDynamic 0.1 (base req: ==4.1.0.0) IOSpec 0.2.2 (base req: >=2 && <4.4) IcoGrid 0.1.2 (base req: >=3 && <4) JsonGrammar 0.2 (base req: >=3.0 && <4.4) KiCS 0.9.2 (base req: ==4.1.*) KiCS-debugger 0.1.1 (base req: ==4.1.*) KiCS-prophecy 0.1.1 (base req: ==4.1.*) L-seed 0.2 (base req: ==3.*) LibZip 0.2.0.1 (base req: >=4.0 && <4.4) LslPlus 0.4.3 (base req: >=4.0 && <4.2) Lucu 0.7.0.2 (base req: ==4.3.*) MaybeT-monads-tf 0.2.0.1 (base req: >=4 && <4.4) Mhailist 0.0 (base req: <4) NewBinary 0.2.1 (base req: <=4) Omega 0.2.2 (base req: >=3 && <4) OpenAFP-Utils 1.3 (base req: -any / >=3 && <4) OpenCLRaw 1.0.1001 (base req: <=4.1.0.0) Operads 1.0 (base req: <=4) Paraiso 0.0.0.0 (base req: >=4.3.1 && <4.4) PermuteEffects 0.2 (base req: >=4.0 && <4.4) RESTng 0.1 (base req: <4) RefSerialize 0.2.7 (base req: >=3 && <4) ReplicateEffects 0.2 (base req: >=4.0 && <4.4) SVG2Q 0.3 (base req: >=4.0 && <=4.3) Shu-thing 1.1.2 (base req: <4) SoccerFun 0.5.1 (base req: >=4 && <4.3) SoccerFunGL 0.5.1 (base req: >=4 && <4.3) Stream 0.4.2 (base req: <4.4) SybWidget 0.5.4 (base req: >=4.1.0 && <4.3.0) TreeStructures 0.0.2 (base req: >=2 && <4) WL500gPControl 0.3.4 (base req: <4) WL500gPLib 0.3.1 (base req: <4) Win32-junction-point 0.0.1 (base req: >=4.0 && <4.4) Wired 0.2.2 (base req: >=3 && <4) Workflow 0.5.6 (base req: >=3 && <4) WxGeneric 0.6.1 (base req: >=4.1.0 && <4.3.0) applicative-quoters 0.1.0.1 (base req: >=4 && <4.4) assembler 0.0.1 (base req: <=0) babylon 0.2 (base req: >=3 && <4) benchpress 0.2.2.4 (base req: >=2.0 && <4.4) bindings-apr 0.1 (base req: ==4.2.*) bindings-apr-util 0.1 (base req: ==4.2.*) bindings-levmar 1.0 (base req: >=3 && <4.4) bindings-librrd 0.2 (base req: ==4.2.*) bindings-libzip 0.1.0.2 (base req: >=4.0 && <4.4) bluetileutils 0.2 (base req: >=3 / <4) buster 2.51 (base req: <=4.1.0.0) cabal2doap 0.2 (base req: >=3 && <4) case-insensitive 0.3 (base req: >=3 && <4.4) cblrepo 0.2.2 (base req: ==4.3.*) collections 0.3.1.1 (base req: >=3 && <4) compose-trans 0.0 (base req: >=2 && <=4) concurrent-extra 0.7 (base req: >=3 && <4.4) constructive-algebra 0.3.0 (base req: >=3 && <=4.3.1.0) containers-unicode-symbols 0.3.0.2 (base req: >=3.0.3.1 && <4.4) curry-base 0.2.8 (base req: >=3 && <4) curry-frontend 0.2.11 (base req: >=3 && <4) data-accessor-monadLib 0.0.1 (base req: <4.1) data-cycle 0.1.1 (base req: ==4.3.*) data-memocombinators 0.4.1 (base req: >=3 && <4.4) data-pprint 0.2 (base req: >=4.0 && <4.4) data-reify-cse 0.0.1 (base req: ==3.*) dataenc 0.14 (base req: >=3.0.0 && <4.4) deunicode 0.1 (base req: ==4.2.*) dgs 0.2 (base req: >=3 && <4) dia-base 0.1.1 (base req: >=4.0 && <4.4) dia-functions 0.2.1.1 (base req: >=4.0 && <4.4) diagrams-cairo 0.3 (base req: >=4.2 && <4.4) diagrams-core 0.3 (base req: >=4.2 && <4.4) diagrams-lib 0.3 (base req: >=4.2 && <4.4) directory 1.1.0.0 (base req: >=4.2 && <4.4) doctest 0.4.0 (base req: >=4.0 && <4.4) dstring 0.4 (base req: >=4 && <4.4) email-validate 0.2.6 (base req: >=2 && <4.4) emgm 0.3.1 (base req: >=3.0 && <4.0) enummapset 0.0.1 (base req: <4.4) error-message 1.1 (base req: >=4.1 && <4.3) estimators 0.1.4 (base req: >=3 && <4) estreps 0.3.1 (base req: >3 && <4) explicit-iomodes 0.6.0.2 (base req: >=4 && <4.4) explicit-iomodes-bytestring 0.1.0.2 (base req: >=4 && <4.4) explicit-iomodes-text 0.1.0.5 (base req: >=4 && <4.4) feed-cli 2009.7.5 (base req: <4) feldspar-compiler 0.4.0.2 (base req: >=4 && <4.4) feldspar-language 0.4.0.2 (base req: >=4 && <4.4) ffmpeg-tutorials 0.3.3 (base req: <4) fingertree-psqueue 0.2 (base req: <=4) fixed-point 0.5.0.0 (base req: ==4.3.*) fixed-point-vector 0.5.0.0 (base req: ==4.3.*) fixed-point-vector-space 0.5.0.0 (base req: ==4.3.*) forkable-monad 0.1.1 (base req: >3.0 && <4.4) fraction 0.0.1.0 (base req: >=3.0 && <4.1) frame 0.1 (base req: >=2 && <4) frame-markdown 0.1 (base req: >=2 && <4) ftdi 0.2.0.1 (base req: >=3.0.3 && <4.3) ftshell 0.3.0.1 (base req: >=1.0 && <4) fullstop 0.1.2 (base req: >=3 && <4.3) funion 0.0.2 (base req: -any / >=3 && <=4) funpat 0.1 (base req: >=4.2.0.2 && <4.4) funsat 0.6.2 (base req: -any / <4) geniconvert 0.20 (base req: <4.1) ghci-diagrams 0.1.1 (base req: >=4.0 && <4.4) glome-hs 0.61 (base req: >=3 && <4) grapefruit-examples 0.0.0.0 (base req: >=3.0 && <4.1) grapefruit-frp 0.0.0.0 (base req: >=3.0 && <4.1) grapefruit-records 0.0.0.0 (base req: >=3.0 && <4.1) grapefruit-ui 0.0.0.0 (base req: >=3.0 && <4.1) grapefruit-ui-gtk 0.0.0.0 (base req: >=3.0 && <4.1) graph-rewriting 0.5.2 (base req: >=4 && <4.4) graph-rewriting-cl 0.2.2 (base req: >=4 && <4.4) graph-rewriting-gl 0.6.5 (base req: >=4 && <4.4) graph-rewriting-lambdascope 0.4.8 (base req: >=4 && <4.4) graph-rewriting-layout 0.4.4 (base req: >=4 && <4.4) graph-rewriting-ski 0.5.6 (base req: >=4 && <4.4) graph-rewriting-trs 0.1.2 (base req: >=4 && <4.4) hSimpleDB 0.3 (base req: >=3 && <=4) haddock 2.9.2 (base req: ==4.3.*) haddock-leksah 2.6.0 (base req: >=4.0.0.0 && <4.3.0.0) hake 1.3.4 (base req: <=4.1.0.0) hamusic 0.1.2.1 (base req: <4) haskell-platform-test 2010.2.0.0 (base req: ==4.2.0.2) haskell-src-meta 0.4.0.1 (base req: >=4.1 && <4.4) haste 0.1.1 (base req: >=3 && <4) haxr-th 3000.5 (base req: <4) hdf 0.7 (base req: ==3.*) hfann 0.2 (base req: >=2 && <4 / -any) hfov 1.0.1 (base req: >=1.0 && <3) hlcm 0.2.2 (base req: -any / >=3 && <4) hommage-ds 0.0.5 (base req: >=2 && <=4) hoogle 4.2.5 (base req: >4 && <4.4) hricket 0.5 (base req: >=3 && <=4) hs-ffmpeg 0.3.4 (base req: <4) hs-gizapp 0.1.0.3 (base req: >=3 && <4.3) hscamwire 0.2.1 (base req: >=3 && <4) hsemail-ns 1.3.2 (base req: <=4) hsini 0.1 (base req: ==4.3.*) hstest 0.0.1 (base req: >=4.0.0 && <4.3) hunit-gui 0.1.4 (base req: ==3.*) hws 1.1.0.1 (base req: >=4.2 && <4.4) hxmppc 0.2 (base req: ==4.3.*) indents 0.3.1 (base req: <4.4) interpolatedstring-qq-mwotton 0.1.1 (base req: >=3 && <4) json-b 0.0.4 (base req: >=2 && <4 / -any) kibro 0.4.3 (base req: ==3.*) kinds 0.0.1.2 (base req: >=3.0 && <4.1) kqueue 0.1 (base req: >=4.0 && <4.4) language-go 0.8 (base req: >=3 && <4) language-sh 0.0.3.1 (base req: <4 && >=3) lat 0.6 (base req: ==4.3.*) lax 0.1.0.0 (base req: >=2.1.1 && <4.1) leksah 0.10.0.4 (base req: >=4.0.0.0 && <4.4) leksah-server 0.10.0.4 (base req: >=4.0.0.0 && <4.4) levmar 1.1 (base req: >=3 && <4.4) levmar-chart 0.2 (base req: >=3 && <4.2) libxslt 0.1 (base req: >=2 && <4) list-tries 0.4.1 (base req: >=3 && <4.4) lojban 0.3 (base req: ==3.*) lostcities 0.2 (base req: >=3 && <4) ls-usb 0.1.0.9 (base req: >=4.0 && <4.4) ltk 0.10.0.4 (base req: >=4.0.0.0 && <4.4) mathlink 2.0.1.1 (base req: >=4.0 && <4.3) matlab 0.1 (base req: <4) minesweeper 0.9.1 (base req: >=3 && <4.4) miniplex 0.3.4 (base req: <4) monad-control 0.2.0.1 (base req: >=3 && <4.4) monad-ran 0.1.0 (base req: >=4.0 && <4.2) mtp 0.1.1.1 (base req: ==4.2.*) murmur-hash 0.1.0.2 (base req: >=3.0 && <4.4) network-bytestring 0.1.3.4 (base req: <4.4) network-dbus 0.0 (base req: <4) network-websocket 0.3 (base req: >=2 && <4) nimber 0.1.1 (base req: >=2 && <4) nymphaea 0.3 (base req: <=4.1.0.0) omnicodec 0.5.0.2 (base req: ==4.3.*) orchid 0.0.8 (base req: ==3.0.*) orchid-demo 0.0.6 (base req: ==3.0.*) palindromes 0.2 (base req: >=3.0 && <4.0) pointfree 1.0.4.1 (base req: >=3 && <4.4) properties 0.0.2 (base req: >=3 && <4) pubsub 0.11 (base req: >=2 && <4) pure-priority-queue 0.14 (base req: >=3.0.3.1 && <4) pure-priority-queue-tests 0.12 (base req: >=3.0.3.1 && <4) randsolid 0.2 (base req: >=3 && <4) ranges 0.2.3 (base req: >=2 && <4.4) reactive-banana 0.4.1.1 (base req: >=4.2 && <4.4) reactive-banana-wx 0.4.1.1 (base req: >=4.2 && <4.4) reactor 0.1.3 (base req: >=4 && <4.4) records 0.1.1.3 (base req: >=3.0 && <4.1) redHandlers 0.1 (base req: <4) regex-applicative 0.1.3 (base req: ==4.3.*) regional-pointers 0.6 (base req: >=4 && <4.4) regions 0.9 (base req: >=4 && <4.4) repr 0.4.1 (base req: >=3 && <4.4) reversi 0.1.1 (base req: ==3.0.3.2) roman-numerals 0.5.0 (base req: >=3.0.3.1 && <4.4) safe-freeze 0.0 (base req: <4.2) safer-file-handles 0.10 (base req: >=4 && <4.4) safer-file-handles-bytestring 0.2 (base req: >=4 && <4.4) scons2dot 0.9 (base req: >=3 && <4) secrm 0.0 (base req: >=2.1.1 && <3) semiring 0.3 (base req: <=4.0 / >=3 && <4) serial 0.2.6 (base req: >=2 && <4) setops 0.1.1 (base req: >=3.0.3.1 && <4.4) sgf 0.1.1 (base req: >=3 && <4) shoap 0.2 (base req: >=2 && <4) showdown 0.5.3 (base req: >=2 && <=4) sifflet 1.2.4 (base req: >=4.0 && <4.4) sifflet-lib 1.2.4 (base req: >=4.0 && <4.4) simple-atom 0.2 (base req: >=3.0 && <4.4) sink 0.1.0.0 (base req: ==4.3.*) smallarray 0.2.2 (base req: <4.4) special-functors 1.0.0.1 (base req: <2) statestack 0.1 (base req: >=4.2 && <4.4) statethread 0.1 (base req: >=1.0 && <2) string-combinators 0.6 (base req: >=4 && <4.4) stylized 0.1.3 (base req: >=4.1 && <4.2) svg2q 0.3.2 (base req: >=4.0 && <=4.3) syntactic 0.6 (base req: >=4 && <4.4) tagsoup-ht 0.3 (base req: >=3 && <4) tconfig 0.5.1 (base req: >=2 && <=4) template 0.2.0.4 (base req: >=3.0 && <4.4) terrahs 0.8 (base req: >=2 && <4) threads 0.4 (base req: >=3 && <4.4) time-http 0.1.0.1 (base req: ==4.3.*) time-w3c 0.1.0.1 (base req: ==4.3.*) trimpolya 0 (base req: >=3 && <4) tupleinstances 0.0.1 (base req: >=3 && <4) twisty 0.1.0 (base req: ==4.2.*) type 0.2.0 (base req: >=4.2 && <4.3) type-equality-check 0.0.0.0 (base req: >=3.0 && <4.1) type-functions 0.2.0.0 (base req: >=3.0 && <4.1) typehash 1.4.0.2 (base req: >=4 && <4.4) uhexdump 0.2.3 (base req: <4.1) unbounded-delays 0.1.0.1 (base req: >=4 && <4.4) unicode-symbols 0.1.1.2 (base req: >=3.0.3.1 && <4.3) unix 2.4.2.0 (base req: >=4.2 && <4.4) usb 0.8 (base req: >=4 && <4.4) usb-enumerator 0.3 (base req: >=4 && <4.4) usb-id-database 0.4.0.5 (base req: >=3.0.3.1 && <4.4) usb-safe 0.12 (base req: >=4 && <4.4) vector-fftw 0.1 (base req: ==4.* && <4.4) visual-graphrewrite 0.4.0.1 (base req: <4.2 / >=4.1.0.0) whim 0.1.1 (base req: >3 && <4) windowslive 0.3 (base req: >=4.0 && <4.2) wp-archivebot 0.1 (base req: >=3 && <4) wyvern 0.1 (base req: >=3 && <4) xml2x 0.4.2 (base req: >3 && <4.2) xmlgen 0.4.0.2 (base req: >=4.2 && <4.4) xmonad-utils 0.1.2 (base req: <4) xsact 1.7.3 (base req: >3 && <4.2) yjftp 0.3.6.2 (base req: >=4 && <=4.1.0.0) zoneinfo 0.5 (base req: <=4.0)

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