error[E0425]: cannot find function `cmp` in this scope
  --> $DIR/fn-to-method.rs:8:13
   |
LL |     let x = cmp(&1, &2);
   |             ^^^ not found in this scope
   |
help: use the `.` operator to call the method `Ord::cmp` on `&{integer}`
   |
LL |     let x = (&1).cmp(&2);
   |             ~  ~~~~~~~~~

error[E0425]: cannot find function `len` in this scope
  --> $DIR/fn-to-method.rs:12:13
   |
LL |     let y = len([1, 2, 3]);
   |             ^^^ not found in this scope
   |
help: use the `.` operator to call the method `len` on `&[{integer}]`
   |
LL -     let y = len([1, 2, 3]);
LL +     let y = [1, 2, 3].len();
   |

error[E0425]: cannot find function `bar` in this scope
  --> $DIR/fn-to-method.rs:16:13
   |
LL |     let z = bar(Foo);
   |             ^^^ not found in this scope
   |
help: use the `.` operator to call the method `bar` on `Foo`
   |
LL -     let z = bar(Foo);
LL +     let z = Foo.bar();
   |

error: aborting due to 3 previous errors

For more information about this error, try `rustc --explain E0425`.