Java like class importing
tcak at gmail.com
Sun Nov 17 09:03:03 UTC 2019
I started working on a project which contains many classes in it.
One of them is name "SpacePosition" which holds x and y position,
and a method "distance". Distance is defined as both instance
method and class method. So I can call it like,
SpacePosition.distance( pos1, pos2 );
After defining many classes in the my main.d file, I wanted to
separate the classes into separate files. I created a new file
with the name "SpacePosition.d" and put the class into it.
In the main.d, I added the line "import SpacePosition;". And when
I compile the main.d, BAM!
Error: undefined identifier distance in module SpacePosition
So you have to import it like "import SpacePosition:
SpacePosition;" or call the method like
"SpacePosition.Spaceposition.distance( pos1, pos2 )".
While the main purpose of modules/namespaces is to separate the
things so they can be managed much easily, this adds the code
I think it would be better to add "import" mechanism a new syntax
to make calls as done in Java. Example:
import class my.project.classes.SpacePosition;
So the compiler would enforce SpacePosition.d file to contain a
single class definition with name "SpacePosition".
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