Steve D'Aprano wrote:
That implies that it is impossible to implement Scheme:
- using a programming language where variables and objects may move during their
lifetime;
- or using a computing device without conventional memory, e.g. implementing
Scheme using hydraulics, DNA computing, clockwork, or emulated in the human
brain.
Only if you interpret the word "address" very narrowly.
By the way, even the low-level notion of "address" that C
programs deal with is, on most modern hardware, a *virtual*
address that goes through a level of translation before it
identifies a physical set of transistors, and that mapping
can change as stuff gets paged in and out. So it's already
an abstract concept to some extent.
--
Greg
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