Non-existant ternary operator is not gracefully handled

[jens1o]

Code

fn main() {
    let x = 5 > 2 ? 3 : 1;
}

Current output

Compiling rust-playground v0.1.0 (/Users/Jens.Hausdorf/dev/rust-playground)
error: expected one of `.`, `;`, `?`, `else`, or an operator, found `3`
 --> src/main.rs:2:21
  |
2 |     let x = 5 > 2 ? 3 : 1;
  |                     ^ expected one of `.`, `;`, `?`, `else`, or an operator

error: could not compile `rust-playground` (bin "rust-playground") due to previous error

Desired output

Compiling rust-playground v0.1.0 (/Users/Jens.Hausdorf/dev/rust-playground)
error: should have used inline if-expression instead
 --> src/main.rs:2:21
  |
2 |     let x = 5 > 2 ? 3 : 1;
  |                     ^ expected one of `.`, `;`, `?`, `else`, or an operator
help: consider changing this to use if-expression
  |
2 |     let x = if 5 > 2 { 3 } else { 1 };
  |  
error: could not compile `rust-playground` (bin "rust-playground") due to previous error

Rationale and extra context

New rustaceans might expect that Rust has the ternary operator.

Other cases

No response

Anything else?

No response