@safe:

​

// Exhibit A

//--------------------------

int getValue1(int* i)

{

    return *i;

}

​

int* foo1()

{

    int value;

    int[] y;

    y ~= getValue1(&value); //Error: reference to local variable `value` assigned to non-scope parameter `i` calling `onlineapp.getValue1`

    return &y[0];

}

​

// Exhibit B

//--------------------------

int getValue2(ref int i)

{

    return i;

}

​

int* foo2()

{

    int value;

    int[] y;

    y ~= getValue2(value); // No error

    return &y[0];

}

​

// Exhibit C (Same as Exhibit A, but with `scope` attribute on `i`)

//--------------------------

int getValue3(scope int* i)

{

    return *i;

}

​

int* foo3()

{

    int value;

    int[] y;

    y ~= getValue3(&value); // No error

    return &y[0];

}