[constables] RFR of constants API
Brian Goetz
brian.goetz at oracle.com
Mon Jun 4 21:54:01 UTC 2018
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?
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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