英文:
Is there a way to access string value from a string pointer receiver within it's own method?
问题
我希望这样做：
type StateSyncError string
func (se *StateSyncError) Error() string {
return "state sync error: " + string(*se)
}
但是由于invalid operation: "state sync error: " + se (mismatched types untyped string and *StateSyncError)，它失败了。
有没有办法解决这个问题？我原本希望~可以工作，因为它应该查看底层类型，但是没有成功。我应该只使用一个结构体吗？
英文:
I wish to do this:
type StateSyncError string
func (se *StateSyncError) Error() string {
return "state sync error: " + se
}
which fails due to invalid operation: "state sync error: " + se (mismatched types untyped string and *StateSyncError).
Is it possible to do somehow? I had hopes of ~ working since it should look at underlying type, but to no avail. Should I just use a struct?
答案1
得分: 2
将指针解引用并使用类型转换：
func (se *StateSyncError) Error() string {
return "state sync error: " + string(*se)
}
测试代码：
var se StateSyncError = "foo"
fmt.Println(se.Error())
输出结果（在Go Playground上尝试）：
state sync error: foo
英文:
Dereference the pointer and use a type conversion:
func (se *StateSyncError) Error() string {
return "state sync error: " + string(*se)
}
Testing it:
var se StateSyncError = "foo"
fmt.Println(se.Error())
Output (try it on the Go Playground):
state sync error: foo
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