May 2003 - Nhc-bugs - Haskell.org

Rates won't be this low forever
by Danielle 28 May '03

28 May '03

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RE: [nhc-bugs] nhc98 rejects legal rebinding
by Simon Marlow 27 May '03

27 May '03

Malcolm writes: > However, I do not propose to fix this bug in nhc98. The example > you give is extremely likely to be a programmer's mistake, so in > my opinion the error message from the compiler is more useful than > the strange runtime behaviour that might otherwise occur. When the > rebinding is deliberate, it is easy for the author to find a different > way of coding the intended semantics. While the behaviour might arguably be wrong, I believe it's more important to stick to the letter of the Haskell 98 spec, at least so that Haskell 98 compilers are compatible with each other. By all means emit a warning in this case (GHC does if you add -fwarn-name-shadowing), but it shouldn't be an error. Besides, it's inconsistent: I'm allowed to shadow 'f', but not 'x'. This is allowed: > module Rebind where > f x = x > where > f = True Cheers, Simon

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nhc98 rejects legal rebinding
by Thomas Hallgren 27 May '03

27 May '03

Hi, When I compile the following module, module Rebind where f x = x where x = True nhc98-1.16 [1] produces the error message ====== Errors when renaming: Redefinition of Identifier x at 5:5 While this is not completely unreasonable, it seems to be a deviation from the Haskell 98 report and the behaviour of other Haskell implementations. (If I understand the Haskell 98 report correctly, function bindings translate to simpler bindings with case expressions in the rhs, and case branches with "where" clauses translate to simpler branches with "let" bindings in the rhs. Thus, variables introduced in "where" clauses should shadow variables in patterns, not clash with them.) -- Thomas H [1] ftp://ftp.cs.york.ac.uk/pub/haskell/nhc98/nhc98-1.16-ix86-Linux.tar.gz

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"hmake +RTS" loops
by Thomas Hallgren 27 May '03

27 May '03

Hi, Today I accedentally typed hmake +RTS -K5M Big.hs instead of hmake -K5M Big.hs To my surprise, the mistake caused hmake to loop! I was using the binary nhc98-1.16 package for ix86-Linux [1]. -- Thomas H [1] ftp://ftp.cs.york.ac.uk/pub/haskell/nhc98/nhc98-1.16-ix86-Linux.tar.gz

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GOD BLESS YOU
by MADAM MARYAM 22 May '03

22 May '03

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newForeignPtr
by Ross Paterson 21 May '03

21 May '03

How about renaming newUnsafeForeignPtr as newForeignPtr to conform to the FFI spec? GHC 6.0 calls the one that takes a Haskell finalizer newConcForeignPtr. (Similarly addForeignPtrFinalizer, though it doesn't work in NHC as yet.)

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Rates won't be this low forever
by Christina 18 May '03

18 May '03

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www.haskell.org.
by Jane Brooks 17 May '03

17 May '03

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Help You Get a Mortgage Loan ...
by Christina 16 May '03

16 May '03

1 0

nhc-bugs
by v163＠163.com 11 May '03

11 May '03

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