http://d.puremagic.com/issues/show_bug.cgi?id=7013
Summary: Mutable interface for BigInts
Product: D
Version: D2
Platform: All
OS/Version: All
Status: NEW
Severity: enhancement
Priority: P2
Component: Phobos
AssignedTo: [email protected]
ReportedBy: [email protected]
--- Comment #0 from [email protected] 2011-11-25 16:52:13 PST ---
When multi-precision numbers become large or quite large, the time spent
managing their memory risk becoming an issue. To improve this situation the GNU
multiprecision integer library allows for mutable numbers, that allow in-place
modification.
There was a discussion about offering a mutable interface for the General
Multiprecision PYthon project (GMPY) numbers too (see "Mutability... but not
for now"):
http://gmpy.sourceforge.net/
So maybe it's useful to add a mutable interface to Phobos bigints. A simple way
to do it is to add a "mutable" attribute that supports just few in-place
operations like += -= *= /= ^^= &= |= (but not other operations like == that
don't need mutability, to keep the situation semantically more clean):
auto x = BigInt("...");
x.mutable += BigInt("...");
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