+1

Yep. 0 and 1 are only allowed.

-Sundar

On 13/11/17, 1:27 PM, Attila Szegedi wrote:
+1. Nice catch. Feels like an implementation detail, but the JVM
specification is indeed unclear on the behavior in case there's a bytecode
method doing this:

public static func(I)Z
     0     iload 0
     1     ireturn


I went spelunking in the JVM spec, and the closest I could find is in
section 2.3.4 says "The Java Virtual Machine encodes boolean array
components using 1 to represent true and 0 to represent false. Where Java
programming language boolean values are mapped by compilers to values of
Java Virtual Machine type int, the compilers must use the same encoding."
So I guess we better stick to that.

Attila.


On Mon, Nov 13, 2017 at 7:21 AM, Priya Lakshmi Muthuswamy<
priya.lakshmi.muthusw...@oracle.com>  wrote:

Hi,

Please review JDK-8190391 : nashorn: "!!" of nonzero even integer var
becomes false when returned

JBS : https://bugs.openjdk.java.net/browse/JDK-8190391
webrev : http://cr.openjdk.java.net/~pmuthuswamy/8190391/webrev.00/

Thanks,
Priya

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