Perl 6 Deep Dive

The require keyword

The last keyword, require, loads a module at runtime. Therefore, order is important. To access the functions from the module, we need fully qualified names now. In turn, to allow a module to use its functions, they must be scoped differently, with the help of our keyword.

The following code is the new version of the file Add.pm: 

unit module Add;our sub add($a, $b) {    return $a + $b;}

And here is a program that requires the module and references the add function using its full name:

require Add;say Add::add(10, 20); # 30

Notice that the fully qualified named is constructed with the help of ::. In the next example, we will use the module name that is stored in a variable and may be changed somehow in the rest of the program, ...