Pragma not recognised when wrapped in #ifdef

[Brandon S. Allbery KF8NH]

On 2009 Feb 10, at 8:55, Alistair Bayley wrote:
> Perhaps CPP shouldn't be a pragma, just a command-line flag? It seems
> to be the only one that affects/involves preprocessor(s). AFAICT, the
> others all affect the haskell compiler stage.


Or require the CPP pragma to be the first thing in the file,  
immediately triggering cpp and a reread.  This means

 > #if 0
 > {-# LANGUAGE CPP #-}
 > #endif

is ambiguous, but I think it could be argued that the programmer has  
asked for _|_ and any behavior is acceptable.

-- 
brandon s. allbery [solaris,freebsd,perl,pugs,haskell] allbery at kf8nh.com
system administrator [openafs,heimdal,too many hats] allbery at ece.cmu.edu
electrical and computer engineering, carnegie mellon university    KF8NH


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