Re: [Boost-users] gcc3.2 preprocessor concatenation or not on negative numbers

From: Andy Little (andy_at_[hidden])
Date: 2006-01-20 12:23:22

"Merrill Cornish"  wrote
> Andy,
>
> I _think_ I may know why concatenation is working like it is.
>
> I believe the purpose of the ## concatentation operator is to
> cause one symbol (i.e., letters, numbers, underscore) to be
> created out of two symbols.  Since the result of the concatenation
> that you specified is _not_ a legal symbol, the preprocessor
> appears to have made a best guess at what should be done
> rather than flag an error.

'pp-number e sign' is a valid pre-processing sequence isnt it?.

 Its pretty cruel whatever it is.  :-(

I will try posing the question on comp.std.c++.

If any one has a workaround for it  I'd be interested to hear it.

Thank for the input

Andy Little