Re: [Haskell-cafe] Arrows for invertible programming: Notation, question

2005-12-29 Thread Alexey Rodriguez Yakushev
On Dec 23, 2005, at 11:53, Arjen wrote: On Fri, 23 Dec 2005, Joel Reymont wrote: Folks, I have been looking at the code for the Arrows for invertible programming paper (http://www.cs.ru.nl/A.vanWeelden/bi-arrows/) and I have a question about syntax. ghci surely does not like it. I've

[Haskell-cafe] Arrows for invertible programming: Notation question

2005-12-23 Thread Joel Reymont
Folks, I have been looking at the code for the Arrows for invertible programming paper (http://www.cs.ru.nl/A.vanWeelden/bi-arrows/) and I have a question about syntax. ghci surely does not like it. What does this mean and how do I make it compile? mapl{|a, b|arr|} :: (mapl{|a, b|arr|},

Re: [Haskell-cafe] Arrows for invertible programming: Notation question

2005-12-23 Thread Ralf Hinze
What does this mean and how do I make it compile? mapl{|a, b|arr|} :: (mapl{|a, b|arr|}, ArrowChoice arr, BiArrow arr) = arr a b It's Generic Haskell source code, see http://www.generic-haskell.org/ Generic Haskell is an extension of Haskell that supports generic programming.

Re: [Haskell-cafe] Arrows for invertible programming: Notation question

2005-12-23 Thread Joel Reymont
Is this something that can be compiled with GHC right now? I noticed - fgenerics but I think it does something else entirely. On Dec 23, 2005, at 8:52 AM, Ralf Hinze wrote: It's Generic Haskell source code, see http://www.generic-haskell.org/ Generic Haskell is an extension of

Re: [Haskell-cafe] Arrows for invertible programming: Notation question

2005-12-23 Thread Ralf Hinze
Is this something that can be compiled with GHC right now? I noticed - fgenerics but I think it does something else entirely. GH is a pre-compiler that takes GH code to Haskell code, so this is a two-step process. -fgenerics turns derivable type classes on (see Derivable type classes, Ralf

Re: [Haskell-cafe] Arrows for invertible programming: Notation, question

2005-12-23 Thread Arjen
On Fri, 23 Dec 2005, Joel Reymont wrote: Folks, I have been looking at the code for the Arrows for invertible programming paper (http://www.cs.ru.nl/A.vanWeelden/bi-arrows/) and I have a question about syntax. ghci surely does not like it. I've updated the web page to say that is does not