Hi Athanasius

Thank you for your very interesting post.

One comment is that I sort of disagree in part with the Perldoc glossary entry you are quoting: to me, a closure does not necessarily have to be an anonymous function, you can do a closure with a named function, as shown in the following trivial (and not terribly useful) example: 

use strict;
use warnings;
use v5.14;

{
    my $add = 20;
    sub add_20 { my $c = shift; return ($c + $add);}
}

say add_20(30);

[download]
which duly prints 50. The $add variable has supposedly fallen out of scope when the sub is called, but it still works, because the add_20 sub is closing over the $add variable.

Having said that, closures are mostly anonymous functions, because they are mostly useful as anon subs.

In reply to Re^2: closures: anonymous subs vs function templates? by Laurent_R
in thread closures: anonymous subs vs function templates? by 5haun

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