Is There a Way to Generate Multiple Objects?

I've written similar code in the past with like multiple structs. But most of it is boilerplate. For example, this like little pet project of mine, but I don't want to write all of this out. It was a bit about a born out of a procrastination kind of, Hey, what if I write a library which generates that code for me? The information density of all these number of lines of code is relatively low.