Rangry.md

Things I dislike about Rust

• Things I strongly dislike:
  • The dividing line between crate and stdlib leans way too far to the crate side of things.
    • Remote dependencies are needed to do virtually everything. There isn’t even a rand package in the standard library.
  • Implicit returns.

    • Semicolon on return changes behavior:

      fn add1(a: i32, b: i32) -> i32 {
         a + b
      }
      
      fn add2(a: i32, b:i32) -> i32 {
          a + b;
      }
      
      fn TypeOf<T>(_: &T) {
          println!("{}", std::any::type_name::<T>())
      }
      
      fn main() {
          let a = add1(1, 2);
          let b = add2(1, 2);
          
          TypeOf(&a);
          TypeOf(&b);
      }

      • At least the compiler errors on this though.

  • Overly complex - seeming to solve self made problems:

    ``` rust
    let b: i32 = 20;
    let c = 30i32;
    let d = 30_i32
    ```
    

  • Crate breakage across minor releases of rust.
    • Pre-Rust 1.45 [[https://github.com/jsgf/rust/commit/ff9646c0adc149dfff194665785f4daa3aa6d9c3][this]] feature was marked as unstable . But post 1.45 it was stable - Libs that use this new feature only bumped their semver patch level when they moved to 1.45. This caused unexpected breakage.
      • For example: [[smol-rs/async-process#1 v1.0.1]] was broken.