[PATCH] D56411: [CUDA][HIP][Sema] Fix template kernel with function as template parameter

[John McCall via Phabricator via cfe-commits]

rjmccall added a comment.

Sema won't necessarily have resolved a template decl when parsing a template argument list, so trying to propagate that decl down to indicate that we're resolving a template argument is not a good approach.

I was going to suggest recording that we're within a template argument in the current `ExpressionEvaluationContextRecord`, but in fact there's an even simpler and more general solution: there's no reason to enforce this restriction in *any* unevaluated context.  If someone wants to refer to a device function within a `decltype` or `sizeof` operand, that should be fine.  So you should just conditionalize the diagnostic on whether this is within an unevaluated context.


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  https://reviews.llvm.org/D56411/new/

https://reviews.llvm.org/D56411