| // Copyright 2019 The Go Authors. All rights reserved. | |
| // Use of this source code is governed by a BSD-style | |
| // license that can be found in the LICENSE file. | |
| // Package xerrors implements functions to manipulate errors. | |
| // | |
| // This package is based on the Go 2 proposal for error values: | |
| // https://golang.org/design/29934-error-values | |
| // | |
| // These functions were incorporated into the standard library's errors package | |
| // in Go 1.13: | |
| // - Is | |
| // - As | |
| // - Unwrap | |
| // | |
| // Also, Errorf's %w verb was incorporated into fmt.Errorf. | |
| // | |
| // Use this package to get equivalent behavior in all supported Go versions. | |
| // | |
| // No other features of this package were included in Go 1.13, and at present | |
| // there are no plans to include any of them. | |
| package xerrors // import "golang.org/x/xerrors" |