efriedma added inline comments.
================
Comment at: clang/lib/Sema/SemaDecl.cpp:13896
+ Diag(var->getLocation(), diag::err_constexpr_var_requires_const_init)
+ << var << Init->getSourceRange();
+ }
----------------
zahiraam wrote:
> efriedma wrote:
> > I don't understand why this diagnostic is necessary.
> Now that the DLLImport variable can be a constant, HasConstInit is returning
> true (it was before returning false) and when the variable is global a
> diagnostic should be reported.
>
> This:
> extern int _declspec(dllimport) val;
> constexpr int& val_ref = val;
>
> should report a diagnostic, but this:
>
> int foo() {
> extern int _declspec(dllimport) val;
> constexpr int& val_ref = val;
> }
>
> shouldn't report a diagnostic.
MSVC doesn't report a diagnostic for either of your examples?
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D137107/new/
https://reviews.llvm.org/D137107
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