On Tue, 8 Mar 2022 16:00:48 GMT, Maurizio Cimadamore <mcimadam...@openjdk.org>
wrote:
>> We propose to provide a runtime anonymous carrier class object generator;
>> java.lang.runtime.Carrier. This generator class is designed to share
>> anonymous classes when shapes are similar. For example, if several clients
>> require objects containing two integer fields, then Carrier will ensure that
>> each client generates carrier objects using the same underlying anonymous
>> class.
>>
>> See JBS for details.
>
> src/java.base/share/classes/java/lang/runtime/Carrier.java line 852:
>
>> 850: * @throws IllegalArgumentException if number of component slots
>> exceeds maximum
>> 851: */
>> 852: public static MethodHandle constructor(MethodType methodType) {
>
> What happens to the methodType return type? (both here and in the components
> method). Should javadoc say anything?
The return type is ignored. Going back to John's notion of just passing in the
parameterTypes would work okay. I think when Brian wrote the original code he
may have been thinking about keying on the MethodType (interned). I'll add a
note about the return type.
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PR: https://git.openjdk.java.net/jdk/pull/7744
