Re: [Haskell-cafe] Conditional compilation for different versions of GHC?

On Sat, Nov 27, 2010 at 9:41 PM, Antoine Latter wrote:

On Sat, Nov 27, 2010 at 10:59 AM, Jinjing Wang wrote:

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Dear list,

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From ghc 7.0.1 release notes:

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The Language.Haskell.TH.Quote.QuasiQuoter type has two new fields: quoteType and quoteDec.

Some of my code needs to be conditionally compiled to support both version 6 and 7, what is the recommended way to do it?

ref:

* http://new-www.haskell.org/ghc/docs/7.0.1/html/users_guide/release-7-0-1.htm...

Can you just not set those fields? Then the code should work as-is for both versions. You'll get warnings for GHC 7, I think.

Sorry Jinjing, I didn't read your original email carefully enough. Antoine is absolutely correct, this is the better way to deal with defining a quasiquoter. My suggestion is only necessary if you want to *use* a quasiquoter. Michael