[llvm-dev] [RFC] Error handling in LLVM libraries.

Paweł Bylica via llvm-dev llvm-dev at lists.llvm.org
Thu Feb 18 07:40:16 PST 2016

On Thu, Feb 18, 2016 at 4:36 PM Rafael Espíndola <llvm-dev at lists.llvm.org>

> > I like this idea in general. It's a better implementation of what
> > ErrorOr originally was before we removed the custom error support
> > because it wasn't used. In fact I would actually support outright
> > replacing ErrorOr with this if it can be done safely, as I find the
> > name TypedErrorOr a bit long.
> The main differences are
> * This will hopefully be used.
> * TypedErrorOr is really a TypedError or T. The situation before was
> not that ErrorOr was std::error_code or T.
> Since we are adding it, I would also support replacing every use of
> ErrorOr with TypedErrorOr and renaming it.

Alternative name could be Expected<T> as proposed by Andrei Alexandrescu.

> Cheers,
> Rafael
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