func (r *describePackageResult) toSerial(res *serial.Result, fset *token.FileSet) {
	var members []*serial.DescribeMember
	for _, mem := range r.members {
		typ := mem.obj.Type()
		var val string
		switch mem := mem.obj.(type) {
		case *types.Const:
			val = mem.Val().String()
		case *types.TypeName:
			typ = typ.Underlying()
		}
		members = append(members, &serial.DescribeMember{
			Name:    mem.obj.Name(),
			Type:    typ.String(),
			Value:   val,
			Pos:     fset.Position(mem.obj.Pos()).String(),
			Kind:    tokenOf(mem.obj),
			Methods: methodsToSerial(r.pkg, mem.methods, fset),
		})
	}
	res.Describe = &serial.Describe{
		Desc:   r.description,
		Pos:    fset.Position(r.node.Pos()).String(),
		Detail: "package",
		Package: &serial.DescribePackage{
			Path:    r.pkg.Path(),
			Members: members,
		},
	}
}

func (r *implementsResult) toSerial(res *serial.Result, fset *token.FileSet) {
	res.Implements = &serial.Implements{
		T:                 makeImplementsType(r.t, fset),
		AssignableTo:      makeImplementsTypes(r.to, fset),
		AssignableFrom:    makeImplementsTypes(r.from, fset),
		AssignableFromPtr: makeImplementsTypes(r.fromPtr, fset),
	}
}

func (r *definitionResult) toSerial(res *serial.Result, fset *token.FileSet) {
	definition := &serial.Definition{
		Desc: r.obj.String(),
	}
	if pos := r.obj.Pos(); pos != token.NoPos { // Package objects have no Pos()
		definition.ObjPos = fset.Position(pos).String()
	}
	res.Definition = definition
}

func (r *callersResult) toSerial(res *serial.Result, fset *token.FileSet) {
	var callers []serial.Caller
	for _, edge := range r.edges {
		callers = append(callers, serial.Caller{
			Caller: edge.Caller.Func.String(),
			Pos:    fset.Position(edge.Pos()).String(),
			Desc:   edge.Description(),
		})
	}
	res.Callers = callers
}

func (r *implementsResult) toSerial(res *serial.Result, fset *token.FileSet) {
	var facts []*serial.Implements
	for _, fact := range r.facts {
		facts = append(facts, &serial.Implements{
			I:    fact.iface.String(),
			IPos: fset.Position(fact.iface.Obj().Pos()).String(),
			C:    fact.conc.String(),
			CPos: fset.Position(deref(fact.conc).(*types.Named).Obj().Pos()).String(),
		})
	}
	res.Implements = facts
}

func (r *referrersResult) toSerial(res *serial.Result, fset *token.FileSet) {
	referrers := &serial.Referrers{
		Pos:  fset.Position(r.query.Pos()).String(),
		Desc: r.obj.String(),
	}
	if pos := r.obj.Pos(); pos != token.NoPos { // Package objects have no Pos()
		referrers.ObjPos = fset.Position(pos).String()
	}
	for _, ref := range r.refs {
		referrers.Refs = append(referrers.Refs, fset.Position(ref.NamePos).String())
	}
	res.Referrers = referrers
}

func (r *calleesResult) toSerial(res *serial.Result, fset *token.FileSet) {
	j := &serial.Callees{
		Pos:  fset.Position(r.site.Pos()).String(),
		Desc: r.site.Common().Description(),
	}
	for _, callee := range r.funcs {
		j.Callees = append(j.Callees, &serial.CalleesItem{
			Name: callee.String(),
			Pos:  fset.Position(callee.Pos()).String(),
		})
	}
	res.Callees = j
}

func (r *freevarsResult) toSerial(res *serial.Result, fset *token.FileSet) {
	var refs []*serial.FreeVar
	for _, ref := range r.refs {
		refs = append(refs,
			&serial.FreeVar{
				Pos:  fset.Position(ref.obj.Pos()).String(),
				Kind: ref.kind,
				Ref:  ref.ref,
				Type: ref.typ.String(),
			})
	}
	res.Freevars = refs
}

func (r *callgraphResult) toSerial(res *serial.Result, fset *token.FileSet) {
	cg := make([]serial.CallGraph, len(r.nodes))
	for _, n := range r.nodes {
		j := &cg[n.ID]
		fn := n.Func
		j.Name = fn.String()
		j.Pos = fset.Position(fn.Pos()).String()
		for callee := range callgraph.CalleesOf(n) {
			j.Children = append(j.Children, callee.ID)
		}
		sort.Ints(j.Children)
	}
	res.Callgraph = cg
}

func (r *peersResult) toSerial(res *serial.Result, fset *token.FileSet) {
	peers := &serial.Peers{
		Pos:  fset.Position(r.queryPos).String(),
		Type: r.queryType.String(),
	}
	for _, alloc := range r.makes {
		peers.Allocs = append(peers.Allocs, fset.Position(alloc).String())
	}
	for _, send := range r.sends {
		peers.Sends = append(peers.Sends, fset.Position(send).String())
	}
	for _, receive := range r.receives {
		peers.Receives = append(peers.Receives, fset.Position(receive).String())
	}
	res.Peers = peers
}

func (r *callstackResult) toSerial(res *serial.Result, fset *token.FileSet) {
	var callers []serial.Caller
	for i := len(r.callpath) - 1; i >= 0; i-- { // (innermost first)
		edge := r.callpath[i]
		callers = append(callers, serial.Caller{
			Pos:    fset.Position(edge.Site.Pos()).String(),
			Caller: edge.Caller.Func().String(),
			Desc:   edge.Site.Common().Description(),
		})
	}
	res.Callstack = &serial.CallStack{
		Pos:     fset.Position(r.target.Pos()).String(),
		Target:  r.target.String(),
		Callers: callers,
	}
}

func (r *callersResult) toSerial(res *serial.Result, fset *token.FileSet) {
	root := r.callgraph.Root()
	var callers []serial.Caller
	for _, edge := range r.edges {
		var c serial.Caller
		c.Caller = edge.Caller.Func().String()
		if edge.Caller == root {
			c.Desc = "synthetic call"
		} else {
			c.Pos = fset.Position(edge.Site.Pos()).String()
			c.Desc = edge.Site.Common().Description()
		}
		callers = append(callers, c)
	}
	res.Callers = callers
}

func (r *whatResult) toSerial(res *serial.Result, fset *token.FileSet) {
	var enclosing []serial.SyntaxNode
	for _, n := range r.path {
		enclosing = append(enclosing, serial.SyntaxNode{
			Description: astutil.NodeDescription(n),
			Start:       fset.Position(n.Pos()).Offset,
			End:         fset.Position(n.End()).Offset,
		})
	}
	res.What = &serial.What{
		Modes:      r.modes,
		SrcDir:     r.srcdir,
		ImportPath: r.importPath,
		Enclosing:  enclosing,
	}
}

func (r *describeValueResult) toSerial(res *serial.Result, fset *token.FileSet) {
	var value, objpos, ptaerr string
	if r.constVal != nil {
		value = r.constVal.String()
	}
	if r.obj != nil {
		objpos = fset.Position(r.obj.Pos()).String()
	}
	if r.ptaErr != nil {
		ptaerr = r.ptaErr.Error()
	}

	var pts []*serial.DescribePointer
	for _, ptr := range r.ptrs {
		var namePos string
		if nt, ok := deref(ptr.typ).(*types.Named); ok {
			namePos = fset.Position(nt.Obj().Pos()).String()
		}
		var labels []serial.DescribePTALabel
		for _, l := range ptr.labels {
			labels = append(labels, serial.DescribePTALabel{
				Pos:  fset.Position(l.Pos()).String(),
				Desc: l.String(),
			})
		}
		pts = append(pts, &serial.DescribePointer{
			Type:    ptr.typ.String(),
			NamePos: namePos,
			Labels:  labels,
		})
	}

	res.Describe = &serial.Describe{
		Desc:   importer.NodeDescription(r.expr),
		Pos:    fset.Position(r.expr.Pos()).String(),
		Detail: "value",
		Value: &serial.DescribeValue{
			Type:   r.typ.String(),
			Value:  value,
			ObjPos: objpos,
			PTAErr: ptaerr,
			PTS:    pts,
		},
	}
}

func (r *callgraphResult) toSerial(res *serial.Result, fset *token.FileSet) {
	nodes := r.callgraph.Nodes()

	numbering := make(map[call.GraphNode]int)
	for i, n := range nodes {
		numbering[n] = i
	}

	cg := make([]serial.CallGraph, len(nodes))
	for i, n := range nodes {
		j := &cg[i]
		fn := n.Func()
		j.Name = fn.String()
		j.Pos = fset.Position(fn.Pos()).String()
		for callee := range call.CalleesOf(n) {
			j.Children = append(j.Children, numbering[callee])
		}
	}
	res.Callgraph = cg
}

func (r *pointstoResult) toSerial(res *serial.Result, fset *token.FileSet) {
	var pts []serial.PointsTo
	for _, ptr := range r.ptrs {
		var namePos string
		if nt, ok := deref(ptr.typ).(*types.Named); ok {
			namePos = fset.Position(nt.Obj().Pos()).String()
		}
		var labels []serial.PointsToLabel
		for _, l := range ptr.labels {
			labels = append(labels, serial.PointsToLabel{
				Pos:  fset.Position(l.Pos()).String(),
				Desc: l.String(),
			})
		}
		pts = append(pts, serial.PointsTo{
			Type:    r.qpos.TypeString(ptr.typ),
			NamePos: namePos,
			Labels:  labels,
		})
	}
	res.PointsTo = pts
}