[llvm] r284364 - ADT: Use LLVM_NODISCARD instead of LLVM_ATTRIBUTE_UNUSED_RESULT for StringRef

[Zachary Turner via llvm-commits]

On Sun, Nov 27, 2016 at 10:54 PM Justin Bogner <mail at justinbogner.com>
wrote:

> Personally, I'd put it on `int` if I could. I don't see a problem with
> adding nodiscard to any of those types.
>

In that case how about adding a warning to clang, such as
-wunused-result-strict that warns any time a return value is ignored,
regardless of the presence of this attribute?
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