Draft Spec for Unnamed Classes and Instance main Methods (JEP 445)

[Archie Cobbs]

I think this will be a nice addition.

On Tue, May 2, 2023 at 5:17 PM Gavin Bierman <gavin.bierman at oracle.com>
wrote:

> The first draft of the spec change document for the feature Unnamed
> classes and instance main methods [1] (the "on-ramp" feature) is now
> available at:
>
> https://cr.openjdk.org/~gbierman/jep445/latest/


1. Minor nit: "An unnamed top level class compilation unit implicitly
declares an class..." -  should be "a class".

2. Just to clarify my own understanding, is this correct? "Unnamed top
level class" is a source code only concept; given a class file, it is not
possible to definitively say whether it came from an "unnamed top level
class".

3. The JEP shows an example of compiling a class "HelloWorld.java" into a
class file "HelloWorld.java" and states "In this case the compiler chooses
HelloWorld for the class name as an implementation detail". So far, so
good. But then in the spec it says:

In simple implementations of the Java SE Platform, where compilation units
> are stored in files, the binary name of an unnamed top level class would
> typically be the name of the file containing the unnamed top level class
> compilation unit (7.3
> <https://cr.openjdk.org/~gbierman/jep445/jep445-20230502/specs/unnamed-classes-instance-main-methods-jls.html#jls-7.3>
> ).
>

That would imply that the binary name of the JEP example would be
"HelloWorld.java", not "HelloWorld". So maybe to clarify this should say
"the name of the file (minus the ".java" suffix) containing the unnamed top
level class compilation unit".

-Archie

-- 
Archie L. Cobbs
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