[英]Passing go embedded struct to function
I have something like this: 我有这样的事情:
type Foo struct{}
func NewFoo() *Foo { ... }
type Bar struct {
*Foo
}
How can I pass an instance of Bar to a function that takes *Foo? 如何将Bar的实例传递给带有* Foo的函数?
func DoStuff(f *Foo) {}
func main() {
bar := Bar{NewFoo()}
DoStuff(bar) // <- go doesn't like this, type mismatch
}
Is it possible to get the embedded structure and pass it to the function? 是否有可能获得嵌入式结构并将其传递给函数?
The only way I can get this to work is if I treated *Foo as a member of the structure and passed it as bar.foo
. 我可以使它
bar.foo
的唯一方法是,如果我将* Foo视为结构的成员并将其作为bar.foo
传递。 But this is kind of messy, is that the only way? 但这有点混乱,这是唯一的方法吗?
Anonymous fields can be addressed by the name of the embedded type: 匿名字段可以通过嵌入类型的名称来寻址:
type Foo struct{}
type Bar struct {
*Foo
}
bar := Bar{&Foo{}}
func(f *Foo) {}(bar.Foo)
See the Struct Types section in the language spec. 请参阅语言规范中的“ 结构类型”部分。
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