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On Fri, 4 Nov 2005, Tim Jenness wrote: >> I notice you have changed #define to enum in grp.h. What's the >> rationale behind that? > > I don't really like the C preprocessor and I've been bitten by constants > being interpreted as doubles rather than ints. > > I'm switching to enum to give the compiler as much help as possible. > I changed all the _err.h files a while back. David, another often stated advantage of enums over defines is that you can inspect the value when using a debugger (since enums are handled by the compiler, not the preprocessor). Peter.