Jeffrey A Law writes: > On Wed, 2006-03-29 at 14:28 -0700, Tom Tromey wrote: > > > On irc today we were discussing handling 'this' in gcj. We can add an > > attribute to the argument to mark it as non-null... but strangely > > there doesn't seem to be a way to mark other local variables as > > known-non-null -- a curious deficiency. > It seems to me that for other locals that the non-null property > ought to be a property of how those locals are assigned a value. > ie, if we're going to be able to derive a non-null for a local we > should be able to derive it from the RHS of the assignment(s) to > that local.
Right, that's true. The idea is that a great many library functions either return a valid object or throw an execption, and we can propagate that information to VRP> > IIRC "this" is actually a parameter and thus there's no assignment > we can derive information from. Mmm, yeah. The point is that we solved the problem for "this", but not for other things. Andrew.
