[GiNaC-list] Possible size issue in test in numeric.cpp
masarati at aero.polimi.it
Thu Aug 17 09:45:15 CEST 2006
Richard B. Kreckel writes:
> This is documented in chapter 3.4 "Conversions".
Right, I stopped reading too early. Anyway, what would be needed by GiNaC
in this case, as far as I can tell, is only the test portion, without
conversion. For example, borrowing from CLN's notation:
bool cl_int_needs_heap(const int x)
bool cl_uint_needs_heap(const unsigned int x);
which basically checks whether a C int or unsigned will be stored by CLN
without heap allocation. This is based on the assumption that, at some
point, the 2^29 limit may move to some other value (because you need more
tags, for example).
Yet another approach (possibly the safest) would be to remove the 2^29
limitation in the cl_I::cl_I(const int) constructor, and let the constructor
test for the value of the int.
I feel I'm really drifting off-topic here; this discussion should really
move to cln-list (if interesting at all).
Dr. Pierangelo Masarati | voice: +39 02 2399 8309
Dip. Ing. Aerospaziale | fax: +39 02 2399 8334
Politecnico di Milano | mailto:pierangelo.masarati at polimi.it
via La Masa 34, 20156 Milano, Italy | http://www.aero.polimi.it/~masarati
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