Felix Wiemann wrote:

> #debug concat("POV")
>
> works fine, but the doc says:
>
> concat(S1,S2,...)
>
> IMO the doc and not the function should be changed because this is a useful
> feature ...

I agree this is a useful feature, although for different reasons.
Consider the following macro:

#macro reverse_string (s)

concat(
  ""
  #local j=strlen(s);
  #while (j>0)
    ,substr(s,j,1)
    #local j=j-1;
  #end
)

#end

It is essential for use with the empty string that concat still works with
only one parameter. This macro is a quick hack and probably not the
best way to reverse a string, so consider it just an example.

  Mark Weyer

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