👀 Views: 70 💬 Answers: 1 📅 Created: 2025-06-01

rust generics traits Rust

I'm a bit lost with I'm having a hard time understanding I've encountered a strange issue with Quick question that's been bugging me - I'm working on a Rust project where I have a generic struct that implements a trait, but I'm running into issues with conflicting trait bounds. I have a struct `Container<T>` that is supposed to hold any type that implements `Display`. However, when I try to implement a method that formats the contained value, I get a compilation behavior. Here’s the relevant code: ```rust use std::fmt::{self, Display}; struct Container<T> { value: T, } impl<T: Display> Container<T> { pub fn display_value(&self) -> String { format!("Value: {}", self.value) } } fn main() { let int_container = Container { value: 42 }; println!("{}", int_container.display_value()); } ``` When I try to compile this code, I receive the following behavior: ``` behavior[E0277]: `i32` doesn't implement `Display` ``` I checked the Rust documentation and `i32` does implement `Display`, so I'm confused why I'm getting this behavior. I also attempted to specify the bound directly in the `main` function: ```rust fn main() { let int_container: Container<dyn Display> = Container { value: 42 }; } ``` This results in a different behavior: ``` behavior[E0277]: the trait bound `i32: Display` is not satisfied ``` It seems that my understanding of how generics and trait bounds work is flawed. Can anyone help clarify what's going wrong here? I want to be able to use `Container<T>` with any type that implements `Display`, but it appears that my current implementation is not achieving that. I'm using Rust 1.63.0. This is part of a larger API I'm building. Any ideas what could be causing this? My development environment is Linux. I've been using Rust for about a year now. Any pointers in the right direction?