Phillip J. Eby wrote: > Actually, it's desirable to be *able* to do it for anything. But certainly > for otherwise-immutable objects it can lead to aliasing issues. Even for immutables, it could be useful to be able to add behaviour that doesn't mutate anything. -- Greg Ewing, Computer Science Dept, +--------------------------------------+ University of Canterbury, | A citizen of NewZealandCorp, a | Christchurch, New Zealand | wholly-owned subsidiary of USA Inc. | greg.ewing at canterbury.ac.nz +--------------------------------------+
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