Read scala default values, if no fieldDefaultValue annotation is found

[987Nabil]

fixes #552
/claim #552

[liewhite]

Any progress?

[987Nabil]

@jdegoes I fixed the linting errors

[liewhite]

I test this locally, it failed on generic field.

[987Nabil]

@liewhite Can you provide a reproducer and tell me for which Scala version?

[liewhite]

Compiling failed on Generic case class here.

[liewhite]

@liewhite Can you provide a reproducer and tell me for which Scala version?

case class A[T](a: Option[T], b: Int) derives Schema

Compilation failed with not a Expr error.

I comment in code view

[987Nabil]

Thanks. I'll take a look soon.

[liewhite]

Thanks. I'll take a look soon.

if(i.isExpr) {
        i.asExpr
}else {
        i.appliedToType(TypeRepr.of[Any]).asExpr
}

This works.
But is it safe to use any after compiler type check?

[987Nabil]

@liewhite Finally found some time. Your solution is ok, since when we call toExpr it ends up being an Expr[Any] anyway.
But there have been more problems I needed to fix. Now it looks ok.

@jdegoes I could not use a generic implicit for the test of the generic class. If I do it, the gen macro for Scala 3 fails. But this seems to be a problem that existed before my changes. I'll open a bg ticket. Edit: #580