d等效指针

原文

@safe void check()
{
    int random;

    auto createGenerator() {
        int* p = &random;
        return p;
    }

    scope gen = createGenerator;
}

它确实编译成功.两者都应成功编译,因为结构只是指针的包装器.
更好用例:

@safe void check2() {
    int random;

    S create1() { return S(); }

    scope S gen1 = create1;  // 无误

    S create2() { return S(&random); }

    //`create()`返回的`struct`临时地址分配给更长寿的变量`gen`
    scope S gen2 = create2;
  }

  struct S { int* r; }