error[E0600]: cannot apply unary operator `-` to type `usize`
  --> $DIR/unsigned-literal-negation.rs:2:13
   |
LL |     let x = -1 as usize;
   |             ^^
   |             |
   |             cannot apply unary operator `-`
   |             help: you may have meant the maximum value of `usize`: `usize::MAX`
   |
   = note: unsigned values cannot be negated

error[E0600]: cannot apply unary operator `-` to type `usize`
  --> $DIR/unsigned-literal-negation.rs:3:13
   |
LL |     let x = (-1) as usize;
   |             ^^^^
   |             |
   |             cannot apply unary operator `-`
   |             help: you may have meant the maximum value of `usize`: `usize::MAX`
   |
   = note: unsigned values cannot be negated

error[E0600]: cannot apply unary operator `-` to type `u32`
  --> $DIR/unsigned-literal-negation.rs:4:18
   |
LL |     let x: u32 = -1;
   |                  ^^
   |                  |
   |                  cannot apply unary operator `-`
   |                  help: you may have meant the maximum value of `u32`: `u32::MAX`
   |
   = note: unsigned values cannot be negated

error: aborting due to 3 previous errors

For more information about this error, try `rustc --explain E0600`.