[PATCH] D126266: Mark the file entry invalid, until reread. Invalidate SLocEntry cache, readd it on reread. Do not use translateFile, because it pulls in parts of the pch.

[Vassil Vassilev via Phabricator via cfe-commits]

v.g.vassilev added a comment.

In D126266#3629145 <https://reviews.llvm.org/D126266#3629145>, @vsapsai wrote:

> Hmm, I'm concerned with the pieces added purely for testing. Specifically, `FileEntriesToReread` and TestHelper friend functions. Need to think how else we can test it.

I am not thrilled about that either. We have discussed this approach here https://reviews.llvm.org/D126183 and we have past experience going that route. I would be happy to drop this test in favor of the mentioned clang-repl test. Should be enough to cover the usecase.

> Do you intend to support only the error cases like
>
>   clang-repl> #include "file_with_error.h"
>   // error is printed, we edit the file and include it again:
>   clang-repl> #include "file_with_error.h"
>
> or do you want to handle re-including files? Something like
>
>   clang-repl> #include "experiments.h"
>   // edit the file and include it again:
>   clang-repl> #include "experiments.h"
>
> Asking because maybe in the error case we commit to some state too eagerly and fixing that sticky eagerness is another option (just guessing, have no idea if it is an actual option and if it is "better").

We want both. The error case is somewhat easier to deal with. However, in case we have error in the logic in `#include "experiments.h"` we want to execute and then re-execute the new code.


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https://reviews.llvm.org/D126266