src/test/run-pass/mir_build_match_comparisons.rs

   1 // Copyright 2015 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 fn test1(x: i8) -> i32 {
  12   match x {
  13     1...10 => 0,
  14     _ => 1,
  15   }
  16 }
  17
  18 const U: Option<i8> = Some(10);
  19 const S: &'static str = "hello";
  20
  21 fn test2(x: i8) -> i32 {
  22   match Some(x) {
  23     U => 0,
  24     _ => 1,
  25   }
  26 }
  27
  28 fn test3(x: &'static str) -> i32 {
  29   match x {
  30     S => 0,
  31     _ => 1,
  32   }
  33 }
  34
  35 enum Opt<T> {
  36     Some { v: T },
  37     None
  38 }
  39
  40 fn test4(x: u64) -> i32 {
  41   let opt = Opt::Some{ v: x };
  42   match opt {
  43     Opt::Some { v: 10 } => 0,
  44     _ => 1,
  45   }
  46 }
  47
  48
  49 fn main() {
  50   assert_eq!(test1(0), 1);
  51   assert_eq!(test1(1), 0);
  52   assert_eq!(test1(2), 0);
  53   assert_eq!(test1(5), 0);
  54   assert_eq!(test1(9), 0);
  55   assert_eq!(test1(10), 0);
  56   assert_eq!(test1(11), 1);
  57   assert_eq!(test1(20), 1);
  58   assert_eq!(test2(10), 0);
  59   assert_eq!(test2(0), 1);
  60   assert_eq!(test2(20), 1);
  61   assert_eq!(test3("hello"), 0);
  62   assert_eq!(test3(""), 1);
  63   assert_eq!(test3("world"), 1);
  64   assert_eq!(test4(10), 0);
  65   assert_eq!(test4(0), 1);
  66   assert_eq!(test4(20), 1);
  67 }