On Wednesday, October 31, 2012 3:25:40 AM UTC+1, Cédric Beust ♔ wrote: > > This declares a union type that is made of either an array of 65k pointers > to integers or a single integer. Then you initialize this record in its "x" > side with the memory address you want to peek and you access it by using > the "x" side of the record. > > It took me months to understand what this code did, but what a revelation > it was when it finally clicked... > I don't get it... :) While I can see a trick in declaring a virtual memory-map overlaying the entire memory space, addressable by integer offset; how does y (and the remaining memory) become useful at all, if it consumes 64K integers? Is the trick that while you can initialize with y, x doesn't actually reserve any memory, yet remaining able to address by x?
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