There are no variables that begin with :
There are variable declarations in signatures that begin with :
:$foo is exactly the same as :foo($foo)
sub bar ( :$foo ) {…}
sub bar ( :foo($foo) ){…}
:$foo in a signature is a shortcut for declaring a named argument :foo()
and a variable with the same base name $foo
:$foo also does the same thing as an argument
my $foo = 1;
bar( :$foo )
bar( :foo($foo) )
bar( foo => $foo )
Note that forms with : can be outside of the signature
bar( ) :$foo
bar( ) :foo($foo)
On Sat, Aug 29, 2020 at 9:05 PM ToddAndMargo via perl6-users <
perl6-us...@perl.org> wrote:
> On 2020-08-29 17:04, ToddAndMargo via perl6-users wrote:
> > On 2020-08-28 23:51, Tobias Boege wrote:
> >> - :$chomp, :$enc, :$nl-in which are passed on to the open call
> >> in the first bullet point above,
> >
> > Hi Tobias,
> >
> > I am in process of revising my keeper on lines.
> > May I talk you out of examples of the syntax used
> > by :$chomp, :$enc, and :$nl-in?
> >
> > Many thanks,
> > -T
>
> And if you would not mind, what is the official name
> of variables that begin with ":"
>
