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 e;

extern(C) int printf(char*, ...);

struct C
{
    float x=0,y=0;

    float dot(ref C b)
    {
        return x*b.x + y*b.y;
    }
}

void main()
{
    C a,b;
    a.x = 2;
    a.y = 6;
    b.x = 3;
    b.y = 5;
    float f = a.dot(b);
    printf("%f\n", f);
    assert(f == 36);
}