RustVU (CS 3891) - Homework 6

Optional / warmup exercises for the week

I highly recommend the Rustlings project for practicing the basic concepts we learn in this class. These completely optional, not graded/submitted exercises can help you to teach Rust programming to your "fingers".

The recommended exercises for this week:

• iterators

Assignment

This assignment contains a single Rust project focusing on iterators. The goal of the exercise is to understand how iterators implement lazy evaluation and how iterators can encapsulate other iterators to implement a complex processing workflow.

The project has a library crate which implements the necessary iterators to emulate the workflow at a pizza parlor, starting from raw ingredients, and combining these to produce pizzas. The project also has an application (binary) crate, which demonstrates the use of the library. Your only job is to implement the necessary pieces in the library crate (lib.rs). The pizza baking workflow is shown below (the boxes represent the iterators, and the produced values are shown on the arrows).

                                                capacity
        ┌────────┐  Water                      ┌─────────┐
infinte │ Faucet ├─────────┐                   │   Can   │
        └────────┘         │                   └────┬────┘
                           │                        │Sauce
        ┌────────┐Flour    │                        │
capacity│  Sack  ├───┐     │                        │       
        └────────┘   └►┌───▼──────────┐Dough ┌──────▼───────┐RawPizza┌───────┐
                       │  BreadBoard  ├──────►  PrepTable   ├────────► Oven  ├────► Pizza
        ┌────────┐   ┌►└───▲──────────┘      └──────▲───────┘        └───────┘
capacity│  Jar   ├───┘     │                        │ n_cheese      baking_time
        └────────┘ Yeast   │                        │
                           │                        │Cheese
        ┌────────┐   Salt  │                   ┌────┴─────┐
capacity│ Shaker ├─────────┘                   │  Grater  │
        └────────┘                             └──────────┘
                                                throughput

Please, read the comments in the source code to understand what is expected from the iterator types.

I placed // TODO comments in the code where I expect you to add implementation code. The test code is separated to a standalone module and is clearly marked with a // DO NOT EDIT BELOW THIS LINE comment. This should be evident: changing the test code is a (not too intelligent) way of cheating. I will handle any such attempts accordingly. However, you are allowed and encouraged to look at the test code to better understand what is expected from you.

Use

You can always check your work with cargo test. You can also run individual tests by running cargo test <test-name> (see the names below).

You can use/modify the application (binary) program (main.rs) as you wish to experiment with your library. This won't be graded. Just make sure, that it compiles.

Grading

Make sure you commit and push your assignment repository once you manage to run cargo test without any errors or warnings.

The homework is graded by test (no partial credits are given for failed tests):

Test	Points
faucet	5
sack	10
jar	10
shaker	5
breadboard	10
can	5
grater	30
prep_table	15
oven	10

Once you push your solution to the repository, GitHub Classroom will run the automated test. I highly recommend to verify your results of this CI/CD worflow - I use these results for grading your work.