* http://cr.openjdk.java.net/~attila/8072426/webrev.00/test/script/basic/JDK-8072426.js.html has copyright year to be 2014

+1 apart from that.


-Sundar

On Thursday 19 February 2015 11:18 PM, Attila Szegedi wrote:
Please review JDK-8072426 at <http://cr.openjdk.java.net/~attila/8072426/webrev.00> 
for <https://bugs.openjdk.java.net/browse/JDK-8072426>

This is what basically became an epic yak shaving exercise after we determined that POJOs 
aren't subjected to ToPrimitive (earlier known as java.math.RoundingMode.UP != 
"UP" problem). While we originally advocated for throwing TypeError for POJOs 
[[DefaultValue]] that would've prevented their implicit toString() in string 
concatenation too. Instead, I opted to fix this once and forever but it turned out that 
the biggest issue with it is the fact that JSObject was also not handled correctly for 
ToPrimitive; fixing that turned out to be the most challenging part, introducing a new 
JSObject.getDefaultValue() method and deprecating JSObject.toNumber() (which isn't used 
anymore at all).

As an unexpected boon, JSObjectLinker no longer needs to do any conversions, so 
its GuardingTypeConverterFactory functionality has been entirely removed. 
NashornPrimitiveLinker will now automatically take care of converting JSObject 
instances to various primitive types, as per specification behavior.

Finally, the ScriptRuntime changes to the equals() and equalDifferentType() are 
purely refactoring of some common type testing subexpressions and conversions, 
as well as short-circuiting of some comparisons. They aren't strictly necessary 
for this issue, but just for clear understanding of what's happening it seemed 
like a good idea to make them more concise (ScriptRuntime.EQ and .NE, of which 
the two affected methods are sub-parts are also not invoked terribly often, and 
I'll soon make them be invoked even less frequently.)

Thanks,
   Attila.

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