value used here after move

 

 

[root@bogon fnmut]# cat src/main.rs 
#[derive(Debug)]
struct f_closure{
        name: String,
}
impl f_closure{
        fn fn_call( self) -> String{
                        self.name
        }
}
fn get_string<T>(name: String , mut f: T) -> String where T : FnMut(String) -> String{
                f(name)
        }
fn main() {
                        let mut name = String::from("kobe");
                        let  f1= |x : String | -> String {
                    name.push_str("24");
                        format!("{}+ {}",x, name)
        };
    let name2 = String::from("dirk");
        println!("name2 {}",get_string(name2, f1));
    let name3 = String::from("lakers ");
        println!("name2 {}",get_string(name3, f1));

}

 

 

[root@bogon fnmut]# cargo build
   Compiling own v0.1.0 (/data2/rust/fnmut)
warning: type `f_closure` should have an upper camel case name
 --> src/main.rs:2:8
  |
2 | struct f_closure{
  |        ^^^^^^^^^ help: convert the identifier to upper camel case: `FClosure`
  |
  = note: `#[warn(non_camel_case_types)]` on by default

error[E0382]: use of moved value: `f1`
  --> src/main.rs:22:40
   |
20 |     println!("name2 {}",get_string(name2, f1));
   |                                           -- value moved here
21 |     let name3 = String::from("lakers ");
22 |     println!("name2 {}",get_string(name3, f1));
   |                                           ^^ value used here after move
   |
note: closure cannot be moved more than once as it is not `Copy` due to moving the variable `name` out of its environment
  --> src/main.rs:16:7
   |
16 |             name.push_str("24");
   |             ^^^^

error: aborting due to previous error; 1 warning emitted

For more information about this error, try `rustc --explain E0382`.
error: could not compile `own`.

To learn more, run the command again with --verbose.

 

cat src/main.rs 
#[derive(Debug)]
struct f_closure{
        name: String,
}
impl f_closure{
        fn fn_call( self) -> String{
                        self.name
        }
}
fn get_string<T>(name: String , mut f: T) -> String where T : FnMut(String) -> String{
                f(name)
        }
fn main() {
                        let mut name = String::from("kobe");
                        let  f1= |x : String | -> String {
                    name.push_str("24");
                        format!("{}+ {}",x, name)
        };
    let name2 = String::from("dirk");
        println!("name2 {}",get_string(name2, f1));
    //let name3 = String::from("lakers ");
        //println!("name2 {}",get_string(name3, f1));

}