args: add new UnknownCommandError type
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This commit makes unknown commands a proper error type so that the caller can check for this specific error type without having to do string comparisons. This is useful in the context of spf13#823 Signed-off-by: Michael Vogt <[email protected]> Signed-off-by: Michael Vogt <[email protected]>
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Anything I can do here to help with this PR? If people are just busy that is fine of course (and I will be patient :) |
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This commit makes unknown commands a proper error type so that the caller can check for this specific error type without having to do string comparisons.
This is useful in the context of #823