p.expect('[')
	key := p.parseType(pkg)
	p.expect(']')
	elem := p.parseType(pkg)

	*t = *types.NewMap(key, elem)
	return t
}

// ChanType = "chan" ["<-" | "-<"] Type .
func (p *parser) parseChanType(pkg *types.Package, nlist []any) types.Type {
	p.expectKeyword("chan")

	t := new(types.Chan)
	p.update(t, nlist)

	dir := types.SendRecv
	switch p.tok {
	case '-':
		p.next()
		p.expect('<')