tree a02550616f4fd38623c9d36b66ef72b7cf872fc7
parent 0a15ea8d9b02651b828a1b41989a6af25c24cb64
author Jason A. Donenfeld <Jason@zx2c4.com> 1605278734 +0100
committer Jason A. Donenfeld <Jason@zx2c4.com> 1605305740 +0000

windows: add DLLError.Unwrap function

Because we're expecting for future functions to be unavailable, we
should add an Unwrap() function to the DLLError struct, so that people
can test for this situation easily via:

    if errors.Is(err, windows.ERROR_PROC_NOT_FOUND) { ... }

DLLError already was wrapping the underlying Errno error, but never got
the Go 1.13 helper method.

Update golang/go#42584

Change-Id: Ib916ddd55a2de29f988edaaf82f2ae0ce1b18e3b
Reviewed-on: https://go-review.googlesource.com/c/sys/+/269937
Trust: Jason A. Donenfeld <Jason@zx2c4.com>
Run-TryBot: Jason A. Donenfeld <Jason@zx2c4.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>