David Abrahams
No, it must be something else. Works perfectly for me, and I assure you that all of MPL was thoroughly tested on VC 7.1:
code snip
And of course, if I replace "false_" with "true_", compilation succeeds. Can you reporoduce these results with the same program and command-lines?
Yes this works. In fact it is the /Z7 switch witch triggers succesful compilation instead of the /ZI we use (default for VC, if you work inside the IDE). I get a 'deja vu' feeling from the days of VC++ 4.2 when some std::map constructs didn't compile on /ZI while the same code builded succesfully with less debug info (e.g. /Z7). As far as the pp statements: I have seen the library and tried it enthusiasticly. Unfortunately it were two days of frustration, and that because of preprocessor failures which are always harder to track than just compilation errors. In the end I could track it down that even a simple case of using the pp wasn't accepted by VC++ 7.1. Of course I used the /ZI switch, which we can't let go for the project, because it gives maximum debug info. Thanks, Me (yes I can put my real name here, but I am pretending to be modest...)