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

From: Merrill Cornish (merrill.cornish_at_[hidden])
Date: 2006-01-20 11:03:52

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.

Merrill