从类型别名转换为原始类型 [英] Convert from type alias to original type

问题描述

假设我有一个这样的类型别名:

Suppose I have a type alias like this:

type myint int;

现在，我有一个 myint 类型，称为 foo .有什么方法可以将foo从 myint 转换为 int ?

Now I have a myint type called foo. Is there any way to convert foo from a myint to an int?

推荐答案

使用转换进行将 myint 转换为 int :

package main

import "fmt"

type myint int

func main() {
    foo := myint(1) // foo has type myint
    i := int(foo)   // use type conversion to convert myint to int
    fmt.Println(i)
}

myint 类型不是int的别名.这是另一种类型.例如，表达式 myint(0)+ int(1)不会编译，因为操作数是不同的类型.Go中有两个内置的类型别名，符文和字节.应用程序无法定义自己的别名.

The type myint is a not an alias for int. It's a different type. For example, the expression myint(0) + int(1) does not compile because the operands are different types. There are two built-in type aliases in Go, rune and byte. Applications cannot define their own aliases.

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