是否可以将 `T` 转换为 `ref T`？

Question

alias refT(T) = ref T;
void test1(refT!int v){
    v = 42;
}

void test2(ref int v){
    v = 42;
}

void main()
{
    import std.stdio;
    int i = 5;
    test1(i);
    writeln(i); // 5
    test2(i);
    writeln(i); // 42
}

test1 不会突变 i 这告诉我它没有捕获 i 作为参考。 ref是不是特殊限定符不能这样用？

Answer 1

ref is not a qualifier:

Although some keywords can be used both as a type qualifier and a storage class, there are some storage classes that cannot be used to construct new types. One example is ref.

是否可以将 `T` 转换为 `ref T`？

Is it possible to transform `T` to `ref T`?

d