[Rd] Defining a method that behaves like '$'?

[Duncan Murdoch]

On 09/07/2010 8:18 AM, Renaud Gaujoux wrote:
> Hi,
>
> is there a way to define a method say '$$' that would behave like '$' 
> and allow calls like 'a$$name'?
No, the parser handles a fixed syntax, and that expression is not 
legal.  You could do it with

a %$$% name

using the infix operator syntax.  (I think the description in the R 
Language Definition suggests this is not legal, since $$ is not a valid 
name, but it does currently work and that's unlikely to change.)

Duncan Murdoch