library_once

[Azlier]

I'm curious about these two keywords: library_once, scope_once. What do they do? What is their use? I couldn't find anything on the subject in the Jasshelper manual. Then again, I have a habit of skipping lines while reading...

 

[Uberplayer]

This code compiles perfectly, but after doing that, you're left only with function H2I, because the second library is ignored (because they use library_once) and it's content isn't added.

library_once MyLibrary

    function H2I takes handle h returns integer
        return h
        return 0
    endfunction

endlibrary

library_once MyLibrary

    function W2I takes widget w returns integer
        return w
        return 0
    endfunction

endlibrary

Read what JassHelper manual says:
"The library_once keyword works exactly like library but you can declare the same library name twice, it would just ignore the second declaration and avoid to add its contents instead of showing a syntax error, it is useful in combination with textmacros."

 

[Azlier]

So it is in the manual! Sadly, I have a perpetual headache these days. And I'm fourteen. I'll bet being an adult is going to be so much fun...