On Thu, Jun 22, 2017 at 1:51 AM, Todd Chester <toddandma...@zoho.com> wrote:
> You want named parameters.
>>
>> sub MAIN(:$fixed-string, :$extended-regex, ...) {
>> # $fixed-string and $extended-regex are Bools here,
>> # True if the corresponding option specified
>> }
>>
>> You should recognize this as being similar to named parameters work for
>> normal Perl 6 functions, but MAIN exposes them to the command line like
>> GNUish long options.
>>
>>
> What does the ":" do? and does it give you back the
> value associated with it, if there is one?
I guess that means you did not recognize colon-pair syntax for named
parameters.
https://docs.perl6.org/language/terms#Pair see at the end for their use as
named parameters.
Since I assume I'm going to have to read that link for someone on the list
anyway:
:name(value)
:name<value>
:name
:!name
:$name
are all colon-pairs. When used as parameters, they indicate named (as
opposed to positional) parameters.
The first form allows you to associate any variable name with the parameter
name, optionally with a type. The second form is always a String (and any
of the bracketing String forms can be used, e.g. :foo<<bar>> --- but *not*
:foo"bar"; that would need to use the first form). The final three are
always Bools; the last one takes the parameter name from the variable name.
--
brandon s allbery kf8nh sine nomine associates
allber...@gmail.com ballb...@sinenomine.net
unix, openafs, kerberos, infrastructure, xmonad http://sinenomine.net
