[Issue 18863] opDispatch with WithStatement & Template Instance

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=18863

Simen Kjaeraas <simen.kjaras at gmail.com> changed:

           What    |Removed                     |Added
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             Status|NEW                         |RESOLVED
                 CC|                            |simen.kjaras at gmail.com
         Resolution|---                         |INVALID

--- Comment #1 from Simen Kjaeraas <simen.kjaras at gmail.com> ---
You've got a bug in your code: ++x has to fail for the template case, since
you're trying to increment a compile-time value. This is what the call to bar
is lowered to:

Foo!1.opDispatch!"bar"()

When you try and compile that, you get these error messages:

Error: cannot modify constant 1
Error: template instance `foo.Foo!1.Foo.opDispatch!"bar"` error instantiating

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