I finally got it this time. The code is now in CVS to enable the syntax:
boost::function<int (int, int)> f(0);
// ...
if (f != 0) {
// ...
f = 0;
}
'f = 0' is an alias for f.clear().
The implementation is based on enable_if (thanks Jaakko!). I'm currently
probing the compiler set that supports enable_if properly. Any known
workarounds? GCC 3.2 is failing so far...
Doug
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