go - 如何修复 linter 警告 `Error return value is not checked`？

Question

我正在调用错误类型值的方法(代码示例中的 foo())。我不在乎这个结果。什么是正确的代码风格编写方式？ Errcheck linter 让我检查这个错误。

//for example, same method may be called from imported entity
func foo() error {
   if err := someFunction(); err != nil {
       return err
   }
   return nil
}

func process() {
   //linter doesn't like this
   foo()

   //this way leads to unused variable error
   err := foo()

   //is this clean way?
   _ = foo()

  return 
}

Answer 1

是的，将其分配给通配符变量是忽略错误的好方法。但强烈反对整个做法(忽略错误)。以下是“Effective Go”对此的评价:

Occasionally you'll see code that discards the error value in order to ignore the error; this is terrible practice. Always check error returns; they're provided for a reason.

   // Bad! This code will crash if path does not exist.
    fi, _ := os.Stat(path)
    if fi.IsDir() {
        fmt.Printf("%s is a directory\n", path)
    }