Readability is more important for tests. If a test fails, you want the problem to be obvious. The developer shouldn’t have to wade through a lot of heavily factored test code to determine exactly what failed. You don’t want your test code to become so complex that you need to write unit-test-tests. However, eliminating duplication … Read more
This looks like a perfect case for generics. You can make a single struct like this: struct ShapeRenderer<T: Shape> { canvas: Canvas, origin: Point, shape: T, } Note that I have bounded the generic type T by a trait Shape (that you would have to create). You can put any bounds here you like (or … Read more
For a detailed explanation, please see the heading “Avoid Duplication in const and Non-const Member Function,” on p. 23, in Item 3 “Use const whenever possible,” in Effective C++, 3d ed by Scott Meyers, ISBN-13: 9780321334879. Here’s Meyers’ solution (simplified): struct C { const char & get() const { return c; } char & get() … Read more