Missing semicolon in Rust statements causes some failures

[mmdbalkhi]

I encountered an issue with IRust. Specifically, when I initially entered println!("Hello World!");, the output was displayed correctly. However, when I input the second part of the program, the output of this part did not display as expected. I hope the examples illustrate the failures clearly.

In: println!("Hello World!");
Out: Hello World!

In: println!("Hello World!")
Out: Hello World!
Hello World!
()

In: print!("Hiii!");
In: 
In: print!("Hiii!")
Out: Hello World!
Hiii!Hiii!()

In other words, the previous commands are repeated.

• /tmp/irust_repl/.../src/main.rs:

fn main() -> (){
      #[allow(unused_imports)]use irust_prelude::*;
      println!("Hello World!");
      print!("Hiii!");
      #[allow(unreachable_code)]() // Do not write past this line (it will corrupt the repl)
}

• /tmp/irust_repl/.../src/main_extern.rs:

fn main() -> (){
  #[allow(unused_imports)]use irust_prelude::*;
  println!("Hello World!");
  print!("Hiii!");
  #[allow(unreachable_code)]() // Do not write past this line (it will corrupt the repl)
}

[sigmaSd]

Hello, it seems to me its working as expected

• If a line ends with semicolon its considered a statement and its not executed ,

• if it doesn't its considered an expression and its executed without being saved in the repl

• so println!(..); you will not see the result but it will get inserted in the repl, then if you evaluate anything , you'll always see that expression

• println!() will just print the content immediately without inserting in the repl, so if the next expressions you evaluate wont show it again

Also I think using prints is not really needed in a repl, if you want to see something you can just execute it