}
		x.mode = value
		x.typ = Typ[Int]

	case _Delete:
		// delete(map_, key)
		// map_ must be a map type or a type parameter describing map types.
		// The key cannot be a type parameter for now.
		map_ := x.typ
		var key Type
		if !underIs(map_, func(u Type) bool {
			map_, _ := u.(*Map)
			if map_ == nil {
				check.errorf(x, InvalidDelete, invalidArg+"%s is not a map", x)
				return false
			}

		}
		x.mode = value
		x.typ = Typ[Int]

	case _Delete:
		// delete(map_, key)
		// map_ must be a map type or a type parameter describing map types.
		// The key cannot be a type parameter for now.
		map_ := x.typ
		var key Type
		if !underIs(map_, func(u Type) bool {
			map_, _ := u.(*Map)
			if map_ == nil {
				check.errorf(x, InvalidDelete, invalidArg+"%s is not a map", x)
				return false
			}

	s := fmt.Sprintf("var map_%s = map[string]string {\n", structName)
	b.addLine(s, indent)
}

func writeFuncFooter(b *buffer, structName string, indent int) {
	b.addLine("}\n", indent) // Closes the map definition

	s := fmt.Sprintf("func (%s) SwaggerDoc() map[string]string {\n", structName)
	b.addLine(s, indent)
	s = fmt.Sprintf("return map_%s\n", structName)
	b.addLine(s, indent+1)

	init.Append(ir.TakeInit(n)...)
	map_ := n.Args[0]
	key := n.Args[1]
	map_ = walkExpr(map_, init)
	key = walkExpr(key, init)

	t := map_.Type()
	fast := mapfast(t)
	key = mapKeyArg(fast, n, key, false)
	return mkcall1(mapfndel(mapdelete[fast], t), nil, init, reflectdata.DeleteMapRType(base.Pos, n), map_, key)
}

// walkLenCap walks an OLEN or OCAP node.

func walkIndexMap(n *ir.IndexExpr, init *ir.Nodes) ir.Node {
	n.X = walkExpr(n.X, init)
	n.Index = walkExpr(n.Index, init)
	map_ := n.X
	t := map_.Type()
	fast := mapfast(t)
	key := mapKeyArg(fast, n, n.Index, n.Assigned)
	args := []ir.Node{reflectdata.IndexMapRType(base.Pos, n), map_, key}

	var mapFn ir.Node
	switch {
	case n.Assigned:
		mapFn = mapfn(mapassign[fast], t, false)

clone(){const clone=new RelatedNameMap();clone.addDiagnostic(this);return clone;}