}
	rparen := p.expect(token.RPAREN)

	return &ast.TypeAssertExpr{X: x, Type: typ, Lparen: lparen, Rparen: rparen}
}

func (p *parser) parseIndexOrSliceOrInstance(x ast.Expr) ast.Expr {
	if p.trace {
		defer un(trace(p, "parseIndexOrSliceOrInstance"))
	}

	lbrack := p.expect(token.LBRACK)
	if p.tok == token.RBRACK {
		// empty index, slice or index expressions are not permitted;