Adjust some more code that was depending on the function and delegate calling conventions being equal. There's also an instance in `tango.text.convert.Layout` that should be adjusted: {{{ Index: tango/text/convert/Layout.d =================================================================== --- tango/text/convert/Layout.d (revision 4578) +++ tango/text/convert/Layout.d (working copy) -660,8 +660,12 @@ case TypeCode.STRUCT: auto s = cast(TypeInfo_Struct) type; - if (s.xtoString) - return Utf.fromString8 (s.xtoString(p), result); + if (s.xtoString) { + char[] delegate() toString; + toString.ptr = p; + toString.funcptr = cast(char[] function()) s.xtoString; + return Utf.fromString8 (toString(), result); + } goto default; case TypeCode.INTERFACE: }}}

module mini.sextzext;

void main()
{
    byte sb  = sextreturn1();
    short ss = sextreturn2();
    assert(ss == -2);
    assert(sb == -2);
    assert(sextparam1(-42) == -42);
    assert(sextparam2(-42) == -42);

    ubyte ub  = zextreturn1();
    ushort us = zextreturn2();
    assert(ub == 2);
    assert(us == 2);
    assert(zextparam1(42) == 42);
    assert(zextparam2(42) == 42);

    assert(getchar() == 'a');
    assert(passchar('z') == 'z');

}

byte sextreturn1()
{
    return -2;
}
short sextreturn2()
{
    return -2;
}

ubyte zextreturn1()
{
    return 2;
}
ushort zextreturn2()
{
    return 2;
}

byte sextparam1(byte b)
{
    return b;
}
short sextparam2(short s)
{
    return s;
}

ubyte zextparam1(ubyte b)
{
    return b;
}
ushort zextparam2(ushort s)
{
    return s;
}

char getchar()
{
    return 'a';
}

char passchar(char ch)
{
    return ch;
}