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 calls1;
import tango.core.Vararg;
extern(C) int printf(char*, ...);
void main()
{
    {int a = byVal1(3);}
    {int a = void; byRef1(a);}
    {char[] c = void; refType(c);}
    {char[] c = void; refTypeByRef(c);}
    {S s = void; structByVal(s);}
    {S s = void; structByRef(s);}
    {S s = void; structByPtr(&s);}
    {printf("c-varargs %d %d %d\n", 1,2,3);}
    {int i=3; float f=24.7; dvararg(i,f);}
    {char[] s = "hello"; dvarargRefTy(s);}
    {char[] ss = "hello world!"; dvarargRefTy(ss);}
}

int byVal1(int a)
{
    return a;
}

void byRef1(ref int a)
{
    a = 3;
}

void refType(char[] s)
{
}

void refTypeByRef(ref char[] s)
{
}

struct S
{
    float f;
    double d;
    long l;
    byte b;
}

void structByVal(S s)
{
}

void structByRef(ref S s)
{
}

void structByPtr(S* s)
{
}

void dvararg(...)
{
    printf("%d %.1f\n", va_arg!(int)(_argptr), va_arg!(float)(_argptr));
}

void dvarargRefTy(...)
{
    char[] s = va_arg!(char[])(_argptr);
    printf("%.*s\n", s.length, s.ptr);
}