Record component annotations with target=PARAMETER

[Gavin Bierman]

Well spotted Tagir. Updated spec on its way...

> On 17 Dec 2019, at 14:29, Vicente Romero <vicente.romero at oracle.com> wrote:
> 
> Hi Tagir,
> 
> Yes the spec should be updated, you are correct that `parameter` should be added here,
> 
> Thanks,
> Vicente
> 
> On 12/17/19 5:10 AM, Tagir Valeev wrote:
>> Hello!
>> 
>> Current records JLS spec draft [1] says:
>> 
>> a record component but T is not applicable to record component
>> declarations, field declarations, method declarations, or type
>> contexts.
>> 
>> However, javac doesn't fail if the annotation target is parameter:
>> 
>> import java.lang.annotation.*;
>> 
>> record Foo(@Anno int x) {}
>> @Target(ElementType.PARAMETER)
>> @interface Anno {}
>> 
>> This code compiles and the canonical constructor is annotated with
>> Anno. To me, the javac behavior is expected and spec should be updated
>> to include "parameters":
>> 
>> a record component but T is not applicable to record component
>> declarations, field declarations, method declarations, parameters, or
>> type contexts.
>> 
>> What do you think? I'm implementing error highlighting for records in
>> IntelliJ now. Should I follow the spec or javac behavior?
>> 
>> With best regards,
>> Tagir Valeev.
>> 
>> http://cr.openjdk.java.net/~gbierman/jep359/jep359-20191125/specs/records-jls.html#jls-9.7.4
>