The loadFile overload (in DomItem, DomEnvironment and DomUnivers) for
different files (in-memory files and files that needs to be loaded from
disk) are either copypasted or just calling the other overload.
Encapsulate the file-related arguments of all loadFile overloads into a
new struct called FileToLoad, such that the copypasted overloads can be
removed. Use the static factory function FileToLoad::fromMemory and
FileToLoad::fromFileSystem to create the FileToLoad struct.
In addition, FileToLoad allows to specify the environment in which a
file should be loaded. Prior this commit, myEnv.loadFile() was creating
a new environment for each loaded file.
Change-Id: I3b6acb681cb77faefdaa447d985bdfbe4f6a9ce2
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
6913084b0d