This is not just a question.

[Nick Sabalausky]

"Yonggang Luo" <yonggangluo at hotmail.com> wrote in message 
news:gfdkcs$1all$1 at digitalmars.com...
> But the  fact is "private import Base";
> from this clue , we can't access Base Class.
> So it's confusing.
>

"private import" works the same as "private class" and "private foo()". It 
means "This module can access it, but nothing else can."

----------------------------------------
module ModuleA;
void fooA()
{
}
//end of file
----------------------------------------
module ModuleB;
void fooB()
{
}
//end of file
----------------------------------------
module ModuleLibrary;

// ModuleLibrary can access all of these
// Anything that imports ModuleLibrary can access all of these
import ModuleA;
class ClassA {}
FunctionA() {}
int VariableA;

// ModuleLibrary can access all of these
// Anything that imports ModuleLibrary can NOT access any of these
private import ModuleB;
private class ClassB {}
private FunctionB() {}
private int VariableB;

//end of file
----------------------------------------
module ModuleMain;
import ModuleLibrary;

//All ok:
fooA();
auto cA = new ClassA();
FunctionA();
VariableA = 1;

//All error:
fooB();
auto cB = new ClassB();
FunctionB();
VariableB = 1;

//end of file
----------------------------------------

So you see, "private import" works just like "private class", "private 
Function()" and "private int".