[constables] RFR of constants API

Vicente Romero vicente.romero at oracle.com
Mon Jun 4 23:18:55 UTC 2018

On 06/04/2018 05:54 PM, Brian Goetz wrote:
> Robert Field raised the following possible bug in the API of 
> MethodHandleDesc.
> A Constant_MethodHandle_info has the following contents:
>   refKind
>   reference to MethodRef or InterfaceMethodRef
>   reference to NameAndType
> Most of these map directly; we extract refKind from Kind, we extract 
> name from name, we extract type descriptor from type. But, it doesn't 
> seem like there's a way to express both (refkind=invokespecial, 
> Constant_MethodRef_info) and (refkind=invokevirtual, 
> Constant_InterfaceMethodRef_info).
> One of the inputs to a MHDesc is a Kind enum constant.  Currently, 
> they map 1:1 with refKind, but it seems to me we need to differentiate 
> between INTERFACE_VIRTUAL and INTERFACE_SPECIAL, where in the latter 
> case, refKind=special but we use an InterfaceMethodRef?

I will fix this,

> On 4/27/2018 1:31 PM, Vicente Romero wrote:
>> Hi all,
>> Please review the current proposal of the constants API, which are 
>> nominal descriptor types defined in pkg java.lang.invoke.constant. 
>> The code can be found at [1]. This API is being developed in the 
>> context of JEP 303: Intrinsics for the LDC and INVOKEDYNAMIC 
>> Instructions [2]
>> Thanks in advance for your comments,
>> Vicente
>> [1] http://cr.openjdk.java.net/~vromero/constant.api/webrev.00
>> [2] http://openjdk.java.net/jeps/303

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