REPORT.md

2nd Software Specification Project - 2018/2019

Question 1

Note that in the FileSystemState and the FileStream classes, all of the functions say they read this. Why is this important?

reads this means that the functions depend on the instance of the class, meaning the instance is readable by the function, or that the function has access to the instance's contents since it is now in the function's reading frame. This is important so the function can access information about the specific object.

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Question 2

Note that it isn't possible to create new FileSystemState objects. What would problems might arise if this were possible?

Similar to the OkState and HostConstants classes, this class is used for verification purposes only, not having a native implementation counterpart. If we could instantiate it, and we proceeded to do it, an error during compilation time would be raised.

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Question 3

Semantically, what does it mean if you add preconditions (requires) to the Main method?

It means that we're imposing restrictions on the environment the program will be running on. In other words, it conditions the execution of the program according to a given set of constraints, including file system state, command line argument count and content, or a mixture of both, essentially controlling the program's required "inputs".