# errors

**Repository Path**: hubo/errors

## Basic Information

- **Project Name**: errors
- **Description**: pkg/errors 是一个 Go 语言的错误处理包，它提供了一个用于错误处理的机制，旨在简化错误信息的创建和传播。这个包提供了一种构建错误的原因和上下文的方法，使得在调试和错误追踪时更加直观和方便。

使用体验：我们的每个项目错误处理都是使用errors，它的的优势是错误多次封装包裹和传寄，可以很方便的拿到错误的调用链和堆栈信息。
- **Primary Language**: Unknown
- **License**: BSD-2-Clause
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2024-04-02
- **Last Updated**: 2026-05-28

## Categories & Tags

**Categories**: Uncategorized

**Tags**: Go语言

## README

# errors [![Travis-CI](https://travis-ci.org/pkg/errors.svg)](https://travis-ci.org/pkg/errors) [![AppVeyor](https://ci.appveyor.com/api/projects/status/b98mptawhudj53ep/branch/master?svg=true)](https://ci.appveyor.com/project/davecheney/errors/branch/master) [![GoDoc](https://godoc.org/github.com/pkg/errors?status.svg)](http://godoc.org/github.com/pkg/errors) [![Report card](https://goreportcard.com/badge/github.com/pkg/errors)](https://goreportcard.com/report/github.com/pkg/errors) [![Sourcegraph](https://sourcegraph.com/github.com/pkg/errors/-/badge.svg)](https://sourcegraph.com/github.com/pkg/errors?badge)

Package errors provides simple error handling primitives.

`go get github.com/pkg/errors`

The traditional error handling idiom in Go is roughly akin to
```go
if err != nil {
        return err
}
```
which applied recursively up the call stack results in error reports without context or debugging information. The errors package allows programmers to add context to the failure path in their code in a way that does not destroy the original value of the error.

## Adding context to an error

The errors.Wrap function returns a new error that adds context to the original error. For example
```go
_, err := ioutil.ReadAll(r)
if err != nil {
        return errors.Wrap(err, "read failed")
}
```
## Retrieving the cause of an error

Using `errors.Wrap` constructs a stack of errors, adding context to the preceding error. Depending on the nature of the error it may be necessary to reverse the operation of errors.Wrap to retrieve the original error for inspection. Any error value which implements this interface can be inspected by `errors.Cause`.
```go
type causer interface {
        Cause() error
}
```
`errors.Cause` will recursively retrieve the topmost error which does not implement `causer`, which is assumed to be the original cause. For example:
```go
switch err := errors.Cause(err).(type) {
case *MyError:
        // handle specifically
default:
        // unknown error
}
```

[Read the package documentation for more information](https://godoc.org/github.com/pkg/errors).

## Roadmap

With the upcoming [Go2 error proposals](https://go.googlesource.com/proposal/+/master/design/go2draft.md) this package is moving into maintenance mode. The roadmap for a 1.0 release is as follows:

- 0.9. Remove pre Go 1.9 and Go 1.10 support, address outstanding pull requests (if possible)
- 1.0. Final release.

## Contributing

Because of the Go2 errors changes, this package is not accepting proposals for new functionality. With that said, we welcome pull requests, bug fixes and issue reports. 

Before sending a PR, please discuss your change by raising an issue.

## License

BSD-2-Clause