Course of Raku / Advanced / Modules / Packages and namespaces 🆕 / Exercises / A nested name

Solution: A nested name

Here is a possible solution to the task.

Code

module Outer {
    module Inner {
        our $base = 10;
        our sub doubled { $base * 2 }
    }
}

say $Outer::Inner::base;
say Outer::Inner::doubled();

🦋 You can find the source code in the file nested-name.raku.

Output

10
20

Comments

1. Nesting one namespace inside another builds a longer :: path. Both the variable and the subroutine live two levels deep, in Outer::Inner.

2. The full name $Outer::Inner::base reaches the variable, and Outer::Inner::doubled() reaches the subroutine through the same two levels. A sub name carries no sigil, so unlike the variable it has no $ in front.

3. Both members are declared with our, which is what makes them visible outside their module. A my declaration would have kept them private to Inner.

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