英文:
Is there a Go equivalent of PHP's __toString method?
问题
在PHP中存在一个__toString()方法，允许自定义对象的表示形式。例如：
final class Foo
{
public function __toString()
{
return "custom representation";
}
}
$foo = new Foo();
echo $foo; // 这将输出 "custom representation"
在Go语言中，可以创建一个结构体：
type Person struct {
surname string
name string
}
sensorario := Person{
"Senso",
"Rario",
}
fmt.Println(sensorario) // 这将输出 "{Senso Rario}"
是否可以为结构体添加一个toString方法？
编辑：
我找到了这个解决方案：
func (p *Person) toString() string {
return p.surname + " " + p.name
}
fmt.Println(simone.toString())
但是我想知道的是，如何将
fmt.Println(simone.toString())
替换为
fmt.Println(simone)
英文:
In php exists a __toString() method that allow to make a taylored representation of an object. For example:
final class Foo
{
public function __toString()
{
return "custom representation";
}
}
$foo = new Foo();
echo $foo; // this will output "custom representation"
In Go it is possible to create a struct:
type Person struct {
surname string
name string
}
sensorario := Person{
"Senso",
"Rario",
}
fmt.Println(sensorario) // this will output "{Senso Rario}"
It is possible to add a toString method to the struct?
EDIT:
I've found this solution:
func (p *Person) toString() string {
return p.surname + " " + p.name
}
fmt.Println(simone.toString())
But what I am looking for, is the way to replace
fmt.Println(simone.toString())
with
fmt.Println(simone)
答案1
得分: 4
我认为你正在寻找Stringer接口。
type Stringer interface {
String() string
}
任何实现了这个接口的类型都会被许多不同的库自动转换为字符串，包括fmt包，因此在你的fmt.Println示例中确实可以工作。
英文:
I think you're looking for the Stringer interface.
type Stringer interface {
String() string
}
Any type that implements this interface will be automatically stringified using it by many different libraries, obviously including the fmt package, and will indeed work in your example of fmt.Println.
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