[PATCH] [LLD] COFF: Define error categories for Driver, Reader and Resolver.

[Rafael Ávila de Espíndola]

LGTM, just check if you really need the various ways of saying Success.


================
Comment at: COFF/Error.h:21
@@ +20,3 @@
+// Driver errors
+enum class DriverError { Success, InvalidOption };
+
----------------
I don't think you need Success. You can just use std::error_code(), no?

http://reviews.llvm.org/D10129

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