[cfe-dev] UsingDecl vs UsingShadowDecl

[Kim Gräsman via cfe-dev]

Hi Richard,

On Mon, May 1, 2017 at 6:28 AM, Richard Smith <richard at metafoo.co.uk> wrote:
>
> The UsingDecl represents the source declaration "using X::Y;"
> Each UsingShadowDecl represents one declaration that was made visible to
> name lookup by the UsingDecl.
>
> There can be multiple UsingShadowDecls if the UsingDecl names an overload set.
> There can be zero if all the declarations for a class scope UsingDecl are hidden by
> derived class members.

It sounds so easy when spelled out like that :-)

And I see now that the UsingShadowDecl is necessary as the link
between the UsingDecl and the target decl, so that resolution can be
made both ways.

Thanks!

- Kim