Add warning for c++ member variable shadowing

[Jonathan Roelofs via cfe-commits]

On 1/24/17 8:10 PM, Saleem Abdulrasool via cfe-commits wrote:
> Don't use the cast for the check, use isa.  Although, since you use the
> value later, it is probably better to write this as:
>
>     if (const auto *RD = cast<CXXRecordDecl>(CurContext))
>       CheckShadowInheritedVariabless(Loc, Name.getAsString(), RD, RD);


@compnerd: s/cast/dyn_cast/ or s/cast/dyn_cast_or_null/, right?


Jon


-- 
Jon Roelofs
jonathan at codesourcery.com
CodeSourcery / Mentor Embedded