Understanding the AST...

[Stefan Koch]

On Thursday, 22 February 2018 at 13:21:04 UTC, joe wrote:
> On Monday, 12 February 2018 at 08:47:58 UTC, RazvanN wrote:
>> [...]
>
> Follow up question...
>
> Why is *.parent always null?
> e.g.:
>
> extern(C++) class MyVisitor(AST): ParseTimeTransitiveVisitor!AST
> {
>   override void visit(AST.Import i)
>   {
>     assert(i.parent is null); // always true
>   }
>
>   override void visitFuncBody(AST.FuncDeclaration f)
>   {
>     assert(f.parent is null); // always true
>   }
> }

I think parent is only set after sema.
and you are overriding the parsetime visitor.