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os: delete code duplications in error files

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Change-Id: I1ec2fcf81a7a9e45a2fae8c02c8adabc7841b4fa
Reviewed-on: https://go-review.googlesource.com/29013
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
This commit is contained in:
bogem 2016-09-10 18:34:07 +05:00 • committed by Ian Lance Taylor
parent ca993d6797
commit 3d562de8e3
4 changed files with 35 additions and 92 deletions
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13
src/os/error.go
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@ -63,3 +63,16 @@ func IsNotExist(err error) bool {
func IsPermission(err error) bool {
return isPermission(err)
}
// underlyingError returns the underlying error for known os error types.
func underlyingError(err error) error {
switch err := err.(type) {
case *PathError:
return err.Err
case *LinkError:
return err.Err
case *SyscallError:
return err.Err
}
return err
}