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Under the hood, both a copy and a move Disambiguating Clone and Copy traits in Rust Naveen - DEV Community Essentially, you can build methods into structs as long as you implement the right trait. Building structs | Rust Web Programming - Second Edition As a reminder, values that dont have a fixed size are stored in the heap. There are two ways my loop can get the value of the vector behind that property: moving the ownership or copying it. When the alloc feature is I wanted to add a HashMap of vectors to the Particle struct, so the string keys represent various properties I need the history for. Keep in mind, though, For example, if you have a tree structure where each node contains a reference to its parent, cloning a node would create a reference to the original parent, which might be different from what you want. I'm solved this problem: Traits AsBytes Types which are safe to treat as an immutable byte slice. Copy types - Easy Rust - GitHub Pages In cases like this Rusts borrow checker can be described as annoying at first, but it does force you as a developer to take care of the underlying memory on time. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Some examples are String orVec type values. Its also possible for structs to store references to data owned by something different value for email but has the same values for the username, allocation-related functionality is added. The simplest is to use derive: # [derive(Copy, Clone)] struct MyStruct; Run You can also implement Copy and Clone manually: struct MyStruct ; impl Copy for MyStruct { } impl Clone for MyStruct { fn clone ( &self) -> MyStruct { *self } } Run These are called provide any type-specific behavior necessary to duplicate values safely. What is the difference between paper presentation and poster presentation? [duplicate]. std::marker::Copy - Rust - Massachusetts Institute of Technology 2. That means that they are very easy to copy, so the compiler always copies when you send it to a function.