Re: [Xotcl] ensemble alias

From: Victor Mayevski <vitick_at_gmail.com>
Date: Thu, 5 Jan 2012 17:48:42 -0800

Thanks Stefan,

I already knew about the "forward" method, the reason I asked about
"alias" is that I noticed that it is a bit faster than "forward".


On Thu, Jan 5, 2012 at 2:22 PM, Stefan Sobernig
<stefan.sobernig_at_wu.ac.at> wrote:
> Victor,
>
>
>> Is it possible to have an alias to ensemble or multi-word commands?
>
>
> Well, namespace ensembles are straight forward; you may find out the
> ensembled Tcl commands using e.g. [namespace ensemble configure string -map]

This should work, thanks.


> and then use the fully-qualified command names as alias target:
>
> package req nx::test
>
> Object create o {
>  :public alias stringLength ::tcl::string::length
> }
>
> ? {o stringLength "xyz"} [string length "xyz"]
>
> If you don't have an ensemble command at hand (e.g., the [string is] classes
> such as "integer", "boolean"), you want to bind in terms of a method,
> consider a forwarder:
>
> o public forward stringIsBoolean string is boolean
>
> ? {o stringIsBoolean "false"} [string is boolean "false"]
>
> A forwarder is needed, because the "boolean" selector does not map to a Tcl
> command, rather is an argument to a paramteric Tcl command
> (::tcl::string::is).
>
> A mixed alternative would be ...
>
> o public alias stringIs ::tcl::string::is
> o public forward stringIsBoolean2 %self stringIs boolean
>
> ? {o stringIsBoolean2 "false"} [string is boolean "false"]
>
> //stefan