| error[E0369]: binary operation `+` cannot be applied to type `&std::string::String` |
| --> $DIR/str-concat-on-double-ref.rs:4:15 |
| | |
| LL | let c = a + b; |
| | - ^ - &str |
| | | | |
| | | `+` cannot be used to concatenate two `&str` strings |
| | &std::string::String |
| help: `to_owned()` can be used to create an owned `String` from a string reference. String concatenation appends the string on the right to the string on the left and may require reallocation. This requires ownership of the string on the left |
| | |
| LL | let c = a.to_owned() + b; |
| | ^^^^^^^^^^^^ |
| |
| error: aborting due to previous error |
| |
| For more information about this error, try `rustc --explain E0369`. |
