Re: [boost] Preprocessor workaround for CodeWarrior

From: Mat Marcus (mmarcus_at_[hidden])
Date: 2001-12-04 11:06:34

It works on CW 7.0 Mac.

  - Mat

At 1:18 PM +0200 12/4/01, Vesa Karvonen wrote:
>Thanks!
>
>Any results on the Mac CW? What about other versions?
>
>If the workaround works on all CW versions (I'd assume that they use 
>the same preprocessor code on every compiler), I'll commit this 
>change to the tuple header:
>
>diff -r1.2 tuple.hpp
>49c49,55
>< #define BOOST_PREPROCESSOR_TUPLE_ELEM_DELAY(N,I,T) 
>BOOST_PREPROCESSOR_IDENTITY(BOOST_PREPROCESSOR_TUPLE##N##_ELEM##I 
>T)()
>---
>>  #if defined(__MWERKS__) && __MWERKS__ <= 0x2405
>>  // This is a workaround for a CodeWarrior preprocessor bug. 
>>Strictly speaking
>>  // this workaround invokes undefined behavior, but it works as desired.
>>  #  define BOOST_PREPROCESSOR_TUPLE_ELEM_DELAY(N,I,T) 
>>BOOST_PREPROCESSOR_TUPLE##N##_ELEM##I##T
>>  #else
>>  #  define BOOST_PREPROCESSOR_TUPLE_ELEM_DELAY(N,I,T) 
>>BOOST_PREPROCESSOR_IDENTITY(BOOST_PREPROCESSOR_TUPLE##N##_ELEM##I 
>>T)()
>  > #endif
>

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