#1579: instance Read Integer contradicts Haskell98
-----------------------------+----------------------------------------------
Reporter: Isaac Dupree | Owner:
Type: bug | Status: new
Priority: normal | Milestone:
Component: libraries/base | Version: 6.6.1
Severity: normal | Keywords:
Difficulty: Unknown | Os: Unknown
Testcase: | Architecture: Unknown
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http://haskell.org/onlinereport/standard-prelude.html says
{{{
instance Read Integer where
readsPrec p = readSigned readDec
}}}
However, I get contradictory results in GHCi:
{{{
Prelude Numeric> readsPrec undefined "-(21602)zzz" :: [(Integer,String)]
[(-21602,"zzz")]
Prelude Numeric> readSigned readDec "-(21602)zzz" :: [(Integer,String)]
[]
}}}
(hugs, however, gives `[]` for both results)
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/1579>
GHC <http://www.haskell.org/ghc/>
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