Okay. So I was hoping to look at any module-info.class and determine whether "requires java.base" was source code explicit or merely a compiler shim. I understand this particular "requires" is ACC_MANDATED, but it seems there is not a way to trace back to the actual source code. I consider this a loss of information. I was really hoping ACC_SYNTHETIC could/would be used to capture the difference. Is there any recourse here?
Cheers, Paul On Fri, Jul 29, 2016 at 1:34 PM, Alex Buckley <alex.buck...@oracle.com> wrote: > On 7/29/2016 12:48 AM, Andrew Dinn wrote: > >> It might be worth pointing out at this stage in the discussion that >> ACC_SYNTHETIC was never given a hard and fast meaning whose logic >> transcends the vagaries of what javac decided to use it for -- citation, >> Neal Gafter in a thread I was involved in many years ago on the meaning >> of this term: >> >> Said definition: >> >> >> http://mail.openjdk.java.net/pipermail/compiler-dev/2010-August/002257.html >> >> and explanation: >> >> >> http://mail.openjdk.java.net/pipermail/compiler-dev/2010-August/002258.html >> > > On the contrary, Neal and I agree on the hard and fast meaning of > ACC_SYNTHETIC. The second link says: > > "As a simple example, the compiler-provided default constructor is added > by the compiler, but it is not synthetic because it is supposed to be > visible for the purposes of the language. The synthetic flag was > systematically added to precisely those symbols that should not be visible > in the language." > > The default ctor, specified in JLS 8.8.9, is not present in source code > but is nevertheless not marked as ACC_SYNTHETIC. It is the poster child for > ACC_MANDATED. In terms of the first link, the default ctor is plainly used > for semantic analysis so ACC_SYNTHETIC is inappropriate. > > The problem is that I can't go back in time to JVMS1 and add ACC_MANDATED > to ClassFile.access_flags, field_info.access_flags, and > method_info.access_flags. There are some classes, fields, and methods on > this Earth marked ACC_SYNTHETIC which "should" be ACC_MANDATED because > they're JLS-defined. As we define new class file artifacts, we can specify > the ACC_SYNTHETIC mask and the ACC_MANDATED mask to allow more precise > recording of "origin". > > Alex >
