How to print structs and arrays?

by

You want to implement the Debug trait on your struct. Using #[derive(Debug)] is the easiest solution. Then you can print it with {:?}:

#[derive(Debug)]
struct MyStruct{
    a: i32,
    b: i32
}

fn main() {
    let x = MyStruct{ a: 10, b: 20 };
    println!("{:?}", x);
}

More Related Contents:

  1. Return local String as a slice (&str)
  2. How to get a reference to a concrete type from a trait object?
  3. How do I return a reference to something inside a RefCell without breaking encapsulation?
  4. Conditionally iterate over one of several possible iterators
  5. Is there any way to create a type alias for multiple traits?
  6. How to convert a String into a &’static str
  7. What’s an idiomatic way to print an iterator separated by spaces in Rust?
  8. What are move semantics in Rust?
  9. println! error: expected a literal / format argument must be a string literal
  10. How do I return an instance of a trait from a method?
  11. “borrowed value does not live long enough” seems to blame the wrong thing
  12. Weird behaviour when using read_line in a loop
  13. How can this instance seemingly outlive its own parameter lifetime?
  14. Why are Rust executables so huge?
  15. What do I have to do to solve a “use of moved value” error?
  16. Why does removing return give me an error: expected type `()` but found type
  17. How do I implement a trait with a generic method?
  18. Linking the lifetimes of self and a reference in method
  19. When I can use either Cell or RefCell, which should I choose?
  20. Can I take a byte array and deserialize it into a struct?
  21. How do I create a Rust callback function to pass to a FFI function?
  22. What is an auto trait in Rust?
  23. Borrow pointer errors recursively traversing tree [duplicate]
  24. How can I borrow from a HashMap to read and write at the same time?
  25. How to print a Vec?
  26. How to get an Option’s value or set it if it’s empty?
  27. How to set a field in a struct with an empty value?
  28. How can I solve “use of moved value” and “which does not implement the `Copy` trait”?
  29. Why does using Option::map to Box::new a trait object not work?
  30. Is the resource of a shadowed variable binding freed immediately?

Leave a Comment