[ic] interpolate

[Kevin Walsh]

Jon <prtyof5 at attglobal.net> wrote:
> This    UserTag foobar Order foo bar baz
> 
> begets this [foobar foo="aaa" bar="bbb" baz="ccc"]
> 
> The 'Order' is that literal ordering i.e. foo is first, bar is second, etc.
> or is that another variable with a value as in Order number ?
> 
The "Order" defines two things:

    1. The order in which positional parameters are expected:

    2. The order in which the given parameters will be passed to
       your code.

If I use the following example:

    UserTag foobar Order foo bar baz

then the following tag calls are equivalent:

     [foobar aaa bbb ccc]

     [foobar baz="ccc" foo="aaa" bar="bbb"]

If the parameters are collected using the following code:

    my ($one,$two,$three) = @_;

then above examples will will cause the following values to be set:

    $one will be set to "aaa"
    $two will be set to "bbb"
    $three will be set to "ccc"

Of course, it's nicer to name the variables after the Order values,
like this:

    my ($foo,$bar,$baz) = @_;

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