}

func (u *Unary) prec() precedence {
	if p, ok := u.Op.(hasPrec); ok {
		return p.prec()
	}
	return precDefault
}

// isDesignatedInitializer reports whether x is a designated
// initializer.
func isDesignatedInitializer(x AST) bool {
	switch x := x.(type) {
	case *Binary:
		if op, ok := x.Op.(*Operator); ok {
			if op.Name == "]=" {
				return true
			}