Question

When you want to use module A as a namespace to work within for the entire file, you can just put:

include A

and whatever follows will be within A. Is there a way to do a similar thing with class B?

Putting:

class B

at the beginning of the file, and after all contents of the file, ending the file all the way down with

end

does not look elegant, and is a cause of mistake. I am looking for a way that does not require a closing command like end.

Edit My description above about include A seemed to be wrong. Even after doing so, the environment is still the main object. What I want is to make it possible so that if I just do

def foo; ... end

without any explicit nesting, then that will be defined as a method to A or B for the respective cases.

Answer 1

To me best knowledge, there is no such directive.

Though if your files are going to “executed” by another script what you can do is this:

File file.rb contains

puts self

File main.rb contains

class B
    eval(File.read('file.rb'))
end

If you like to make this more transparent, you might even provide your own implementation of require which hides all this magic.