src/test/compile-fail/lint-type-limits.rs

   1 // Copyright 2012 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11 // compile-flags: -D type-limits
  12 fn main() { }
  13
  14 fn foo() {
  15     let mut i = 100u;
  16     while i >= 0 { //~ ERROR comparison is useless due to type limits
  17         i -= 1;
  18     }
  19 }
  20
  21 fn bar() -> i8 {
  22     return 123;
  23 }
  24
  25 fn baz() -> bool {
  26     128 > bar() //~ ERROR comparison is useless due to type limits
  27 }
  28
  29 fn qux() {
  30     let mut i = 1i8;
  31     while 200 != i { //~ ERROR comparison is useless due to type limits
  32         i += 1;
  33     }
  34 }
  35