RFR (14) 8235837: Memory access API refinements

[Chris Hegarty]

> On 14 Jan 2020, at 18:30, Maurizio Cimadamore <maurizio.cimadamore at oracle.com> wrote:
> 
> Another revision which addresses some additional CSR feedback:
> 
> * SequenceLayout::withElementCount should throw if new element count < 0
> * MemoryLayout::hasSize should clarify that certain layout (e.g. ValueLayout) always have a size
> 
> Webrev:
> 
> http://cr.openjdk.java.net/~mcimadamore/8235837_v3
> 
> delta from previous iteration:
> 
> http://cr.openjdk.java.net/~mcimadamore/8235837_v3_delta
> 
> javadoc
> 
> http://cr.openjdk.java.net/~mcimadamore/8235837_v3_javadoc
> 
> specdiff
> 
> http://cr.openjdk.java.net/~mcimadamore/8235837_v3_specdiff/overview-summary.html 

This latest revision looks good.

-Chris.