Re: Question on layer/peeling
Timo Kinnunen
timo.kinnunen at gmail.com
Tue Jan 6 22:14:56 UTC 2015
The type in bytecode will be Object, but the type in source code will be V, with V=boxed complex number, for example. The idiom I’m thinking of is
Complex complex = numbers.get(nonexistentKey);
if(complex == null) return;
calculate(complex.re, complex.im);
(Complex is a value type, numbers is a Java 5 hash map)
--
Have a nice day,
Timo.
Sent from Windows Mail
From: John Rose
Sent: Tuesday, January 6, 2015 23:09
To: Timo Kinnunen
Cc: Brian Goetz, Michael Barker, valhalla-dev at openjdk.java.net
On Jan 6, 2015, at 1:00 PM, Timo Kinnunen <timo.kinnunen at gmail.com> wrote:
>
> Before assigning semantics to x == null, let’s not forget boxing. What will happen if x is a boxed value which was returned from a call to the non-specialized Map.get(Object key) method?
? Then the comparison will be false. In any case the type of x there is Object, isn't it, so there's nothing new here? — John
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