I've recently ran into a hard to track bug in my code:

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enum MouseAction
{
    press,

    release,

    /** Convenience - equal to $(D press). */
    click = press,

    double_click,  // oops, it's now equal to release!!
}

void main()
{
    static assert(MouseAction.release != MouseAction.double_click);  // fail
}
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Unfortunately the introduction of the convenience member ended up re-setting the enum member init counter, which ended up making "double_click" equal the value of "release".

To avoid such buggy code, but still allow these convenience members, I propose we introduce member aliases as a new feature:

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enum MouseAction
{
    press,

    release,

    alias click = press,  // same as press, but does not reset the counter!

    double_click,  // equals release + 1
}

void main()
{
    static assert(MouseAction.release != MouseAction.double_click);  // ok
}
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