JEP 193: Enhanced Volatiles (original) (raw)

Jeroen Frijters jeroen at sumatra.nl
Thu Mar 6 07:52:03 UTC 2014

Sorry Peter, but that is a nonsensical definition of language semantics. By using your definition, if Microsoft adds a feature to the CLR using custom attributes, the Java language semantics change, because on IKVM you can use these custom attributes in your Java code.

Regards, Jeroen

-----Original Message----- From: Peter Levart [mailto:peter.levart at gmail.com] Sent: Wednesday, March 5, 2014 18:07 To: Jeroen Frijters; Brian Goetz; core-libs-dev at openjdk.java.net; Doug Lea Subject: Re: JEP 193: Enhanced Volatiles

On 03/05/2014 05:55 PM, Jeroen Frijters wrote: Brian Goetz wrote: I suspect you were expecting this response: we don't add language semantics through annotations. Technically, we're not adding language semantics. The JVM is the one interpreting the annotations. And the JVM is the one implementing the language semantics (together with javac which feeds the JVM with bytecodes). Language semantcis are implemented by the combination of javac and JVM. If you say that this feature does not require any change to javac, you're just saying that you put all the burden on the JVM, but you are implementing the language semantics using annotations nevertheless... Regards, Peter

I'm not trying to frustrate you; evolving a language with millions of users is really, really hard. And one of the things that makes it hard is recognizing our intrinsic conflicts of interest between "what good will this do me" and "what harm will it do others." I understand, that's why I want to avoid adding language support for this niche/specialist feature. Regards, Jeroen

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