expand-macro.d

// (defmacro ex1 (K) `(defun addnumber (X) (+ ,K X) ))
mixin template ex1(alias K)
{
    int addnumber(int X)
    {
        return K + X;
    }
}

// (defmacro ex0 (M K) `(progn (macroexpand-1 (,M ,K))))
mixin template ex0(alias M, alias K)
{
    mixin M!K;
}

// (ex0 ex1 4)
mixin ex0!(ex1, 4);

void main()
{
    assert(addnumber(2) == 6);
}