Messages in this thread | | | Date | Fri, 20 Dec 2013 22:33:48 +0100 | From | Peter Zijlstra <> | Subject | Re: [PATCH] pid: change task_struct::pid to read-only |
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On Fri, Dec 20, 2013 at 08:01:57PM +0100, Oleg Nesterov wrote: > The only problem is that > > #define ASSIGN_CONST(l, r) (*(typeof(r) *)&(l) = (r)) > > obviously can't work in this case ;) We need something more clever.
Hmm indeed, C++ has both the const_cast<>() thingy and the template system is powerful enough to actually implement const_cast<>() inside the language.
But I cannot find anything useful for C. Your attempt to use the rvalue type to hopefully obtain a const-less lvalue type is clever, but does indeed fail where the rvalue is const too.
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