[cfe-dev] MSVC 2019 - Compilation error in clang/AST/ExprCXX.h

[Reid Kleckner via cfe-dev]

I built clang with that version of MSVC, but I wasn't able to observe the
error. I didn't go back to the linked revision, though, so perhaps it was
fixed in the meantime. In any case, this line, `friend class
TrailingObjects;`, is incorrect, it shouldn't use `class`. I removed it in
https://github.com/llvm/llvm-project/commit/09ba2063dc9339957b999c.

On Fri, Nov 20, 2020 at 12:57 PM Open Sorcerer via cfe-dev <
cfe-dev at lists.llvm.org> wrote:

> Hello,
>
> I see the following compile-time error while building my tool that uses
> libtooling APIs.
>
> C:\path\to\source\repos\llvm-project\clang\include\clang/AST/ExprCXX.h(4867,31):
> error C2990: 'llvm::TrailingObjects': non-class template has already been
> declared as a class template
>
> Compiler used:
> Microsoft (R) C/C++ Optimizing Compiler Version 19.28.29334 for x64
>
> I see no such error in Linux builds of the same sources built using gcc
> installed on Ubuntu 20.4 and Ubuntu 18.04 .
>
> Can someone knowledgeable please point me to a solution that addresses
> this build failure on Windows 10?
>
> Tip of llvm-project repo in use:
>
> commit adf9f64a02838a16d0c6cadfbd089254b126bd22 (HEAD -> master,
> origin/master, origin/HEAD)
> Author: ergawy <kareem.ergawy at gmail.com>
> Date:   Wed Nov 18 12:43:06 2020 -0500
>
>     [MLIR][SPIRV] Rename `spv._reference_of` to `spv.mlir.referenceof`
>
>     This commit does the renaming mentioned in the title in order to bring
>     'spv' dialect closer to the MLIR naming conventions.
>
>     Reviewed By: antiagainst
>
>     Differential Revision: https://reviews.llvm.org/D91715
>
> Thanks!
>
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