pei := types.NewPtr(ei)         // *interface{}
	fldt := mkFuncType(types.FakeRecvType(), []*types.Type{},
		[]*types.Type{types.Types[types.TSTRING]})
	field := types.NewField(src.NoXPos, typecheck.Lookup("F"), fldt)
	nei := types.NewInterface([]*types.Field{field})
	i16 := types.Types[types.TINT16]
	tb := types.Types[types.TBOOL]
	s1 := mkstruct(i16, i16, tb)
	ft := mkFuncType(nil, []*types.Type{s1, ei, ei, nei, pei, nei, i16},

	for k, t := range fieldtypes {
		if t == nil {
			panic("bad -- field has no type")
		}
		f := types.NewField(src.NoXPos, nil, t)
		fields[k] = f
	}
	s := types.NewStruct(fields)
	return s
}

func mkFuncType(rcvr *types.Type, ins []*types.Type, outs []*types.Type) *types.Type {
	q := typecheck.Lookup("?")
	inf := []*types.Field{}
	for _, it := range ins {
		inf = append(inf, mkParamResultField(it, q, ir.PPARAM))
	}