英文:
Shadowing a global function
问题
有没有办法在golang包的全局范围内隐藏一个函数？在某个go文件中，我不希望用户能够调用BFunc...也就是说，我想对它进行包装...
假设这个包提供了BFunc()函数，我有一个调皮的用户想要导入它：
. "github.com/a/bfunc"
所以，在另一个go文件的全局范围内，我可能会这样做：
func BFunc() { fmt.Print("哈哈，我骗到你了") }
当我尝试这样做时，我会得到一个错误，指出有一个相同函数的先前声明，特别是指.导入。
有没有一种语法上的技巧可以阻止用户将bfunc.BFunc()方法全局导入到他们的代码中？
更新
可以使用一个更简单的代码片段来描述这个问题。
package main
import . "fmt"
func Print(t string) {
Print("ASDF")
}
func main() {
Print("ASDF")
}
这段代码无法工作，因为Print被重新声明了。如果有一种方法可以绕过这个问题，使得Print可以重新声明，那么这将有效地回答了我的原始问题。
英文:
Is there a way to shadow a function at global scope in a golang package? In some go file, I DONT want users to be able to call BFunc... That is, I want to wrap it...
// Lets say this package provides BFunc()
// And I have a naughty user who wants to import it
. "github.com/a/bfunc"
So, In another go file at global scope, I might do:
func BFunc() { fmt.Print("haha I tricked you") }
When I try this, I get an error that there is a previous declaration of the same function, referring specifically to the . import.
Would there be a syntactical hack I can do to prevent users from globally importing the bfunc.BFunc() method into their code?
UPDATE
This can be described using a simpler snippet.
package main
import . "fmt"
func Print(t string) {
Print("ASDF")
}
func main() {
Print("ASDF")
}
Which doesn't work, because Print is redeclared. If there is a way to hack around this so that Print can be redeclared, then that would answer my original question effectively.
答案1
得分: 2
如果你不希望库的用户使用某个函数，那就不要导出该函数。
无法遮蔽另一个包中定义的标识符。即使在同一个包中，也无法遮蔽命名函数。
英文:
If you don't want users of a library to use a function, then don't export that function.
Shadowing identifiers defined in another package is impossible. Shadowing named functions is impossible even in the same package.
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