src/test/run-pass/match-arm-statics.rs

   1 // Copyright 2014 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
  12 struct NewBool(bool);
  13
  14 enum Direction {
  15     North,
  16     East,
  17     South,
  18     West
  19 }
  20 struct Foo {
  21     bar: Option<Direction>,
  22     baz: NewBool
  23 }
  24 enum EnumWithStructVariants {
  25     Variant1(bool),
  26     Variant2 {
  27         dir: Direction
  28     }
  29 }
  30
  31 const TRUE_TRUE: (bool, bool) = (true, true);
  32 const NONE: Option<Direction> = None;
  33 const EAST: Direction = Direction::East;
  34 const NEW_FALSE: NewBool = NewBool(false);
  35 const STATIC_FOO: Foo = Foo { bar: Some(Direction::South), baz: NEW_FALSE };
  36 const VARIANT2_NORTH: EnumWithStructVariants = EnumWithStructVariants::Variant2 {
  37     dir: Direction::North };
  38
  39 pub mod glfw {
  40     #[derive(Copy, Clone)]
  41     pub struct InputState(usize);
  42
  43     pub const RELEASE  : InputState = InputState(0);
  44     pub const PRESS    : InputState = InputState(1);
  45     pub const REPEAT   : InputState = InputState(2);
  46 }
  47
  48 fn issue_6533() {
  49     use glfw;
  50
  51     fn action_to_str(state: glfw::InputState) -> &'static str {
  52         use glfw::{RELEASE, PRESS, REPEAT};
  53         match state {
  54             RELEASE => { "Released" }
  55             PRESS   => { "Pressed"  }
  56             REPEAT  => { "Repeated" }
  57             _       => { "Unknown"  }
  58         }
  59     }
  60
  61     assert_eq!(action_to_str(glfw::RELEASE), "Released");
  62     assert_eq!(action_to_str(glfw::PRESS), "Pressed");
  63     assert_eq!(action_to_str(glfw::REPEAT), "Repeated");
  64 }
  65
  66 fn issue_13626() {
  67     const VAL: [u8; 1] = [0];
  68     match [1] {
  69         VAL => unreachable!(),
  70         _ => ()
  71     }
  72 }
  73
  74 fn issue_14576() {
  75     type Foo = (i32, i32);
  76     const ON: Foo = (1, 1);
  77     const OFF: Foo = (0, 0);
  78
  79     match (1, 1) {
  80         OFF => unreachable!(),
  81         ON => (),
  82         _ => unreachable!()
  83     }
  84
  85     enum C { D = 3, E = 4 }
  86     const F : C = C::D;
  87
  88     assert_eq!(match C::D { F => 1, _ => 2, }, 1);
  89 }
  90
  91 fn issue_13731() {
  92     enum A { AA(()) }
  93     const B: A = A::AA(());
  94
  95     match A::AA(()) {
  96         B => ()
  97     }
  98 }
  99
 100 fn issue_15393() {
 101     #![allow(dead_code)]
 102     struct Flags {
 103         bits: usize
 104     }
 105
 106     const FOO: Flags = Flags { bits: 0x01 };
 107     const BAR: Flags = Flags { bits: 0x02 };
 108     match (Flags { bits: 0x02 }) {
 109         FOO => unreachable!(),
 110         BAR => (),
 111         _ => unreachable!()
 112     }
 113 }
 114
 115 fn main() {
 116     assert_eq!(match (true, false) {
 117         TRUE_TRUE => 1,
 118         (false, false) => 2,
 119         (false, true) => 3,
 120         (true, false) => 4
 121     }, 4);
 122
 123     assert_eq!(match Some(Some(Direction::North)) {
 124         Some(NONE) => 1,
 125         Some(Some(Direction::North)) => 2,
 126         Some(Some(EAST)) => 3,
 127         Some(Some(Direction::South)) => 4,
 128         Some(Some(Direction::West)) => 5,
 129         None => 6
 130     }, 2);
 131
 132     assert_eq!(match (Foo { bar: Some(Direction::West), baz: NewBool(true) }) {
 133         Foo { bar: None, baz: NewBool(true) } => 1,
 134         Foo { bar: NONE, baz: NEW_FALSE } => 2,
 135         STATIC_FOO => 3,
 136         Foo { bar: _, baz: NEW_FALSE } => 4,
 137         Foo { bar: Some(Direction::West), baz: NewBool(true) } => 5,
 138         Foo { bar: Some(Direction::South), baz: NewBool(true) } => 6,
 139         Foo { bar: Some(EAST), .. } => 7,
 140         Foo { bar: Some(Direction::North), baz: NewBool(true) } => 8
 141     }, 5);
 142
 143     assert_eq!(match (EnumWithStructVariants::Variant2 { dir: Direction::North }) {
 144         EnumWithStructVariants::Variant1(true) => 1,
 145         EnumWithStructVariants::Variant1(false) => 2,
 146         EnumWithStructVariants::Variant2 { dir: Direction::West } => 3,
 147         VARIANT2_NORTH => 4,
 148         EnumWithStructVariants::Variant2 { dir: Direction::South } => 5,
 149         EnumWithStructVariants::Variant2 { dir: Direction::East } => 6
 150     }, 4);
 151
 152     issue_6533();
 153     issue_13626();
 154     issue_13731();
 155     issue_14576();
 156     issue_15393();
 157 }