It seems to me the way round that at XS level is to use a varargs signature? (I've recently been battling PDL's overload methods) 
char *
op_stringify(left, ...)
    SV * left
  CODE:
    RETVAL = my_stringify(left);
  OUTPUT:
    RETVAL

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In reply to Re: Calling an overload::Method by etj
in thread Calling an overload::Method by hv

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