| 1 | // Copyright (C) 2016-2018 Free Software Foundation, Inc. |
| 2 | |
| 3 | // This program is free software; you can redistribute it and/or modify |
| 4 | // it under the terms of the GNU General Public License as published by |
| 5 | // the Free Software Foundation; either version 3 of the License, or |
| 6 | // (at your option) any later version. |
| 7 | // |
| 8 | // This program is distributed in the hope that it will be useful, |
| 9 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | // GNU General Public License for more details. |
| 12 | // |
| 13 | // You should have received a copy of the GNU General Public License |
| 14 | // along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 15 | |
| 16 | #![allow(dead_code)] |
| 17 | #![allow(unused_variables)] |
| 18 | #![allow(unused_assignments)] |
| 19 | |
| 20 | |
| 21 | pub trait Whatever { |
| 22 | fn whatever(&self) -> i32; |
| 23 | fn static_i32(x: i32) -> Self; |
| 24 | } |
| 25 | |
| 26 | impl Whatever for i32 { |
| 27 | fn whatever(&self) -> i32 { |
| 28 | *self // set breakpoint 2 here |
| 29 | } |
| 30 | |
| 31 | fn static_i32(x: i32) -> i32 { |
| 32 | x |
| 33 | } |
| 34 | } |
| 35 | |
| 36 | pub struct HasMethods { |
| 37 | value: i32 |
| 38 | } |
| 39 | |
| 40 | impl HasMethods { |
| 41 | pub fn new() -> HasMethods { |
| 42 | HasMethods { value: 0 } |
| 43 | } |
| 44 | |
| 45 | pub fn incr(&mut self) -> &mut HasMethods { |
| 46 | self.value += 1; |
| 47 | self |
| 48 | } |
| 49 | |
| 50 | pub fn take(self) -> HasMethods { |
| 51 | self |
| 52 | } |
| 53 | } |
| 54 | |
| 55 | impl Whatever for HasMethods { |
| 56 | fn whatever(&self) -> i32 { |
| 57 | self.value |
| 58 | } |
| 59 | |
| 60 | fn static_i32(x: i32) -> HasMethods { |
| 61 | HasMethods{value: x} |
| 62 | } |
| 63 | } |
| 64 | |
| 65 | enum SomeEnum { |
| 66 | One, |
| 67 | Two, |
| 68 | Three(i32), |
| 69 | Four{x: i32} |
| 70 | } |
| 71 | |
| 72 | impl SomeEnum { |
| 73 | fn value(&self) -> i32 { |
| 74 | match *self { |
| 75 | SomeEnum::Three(x) => x, |
| 76 | SomeEnum::Four{x} => x, |
| 77 | _ => 0 |
| 78 | } |
| 79 | } |
| 80 | |
| 81 | fn mut_value(&mut self) -> i32 { |
| 82 | match *self { |
| 83 | SomeEnum::Three(x) => x, |
| 84 | SomeEnum::Four{x} => x, |
| 85 | _ => 0 |
| 86 | } |
| 87 | } |
| 88 | |
| 89 | fn take_value(self) -> (i32, SomeEnum) { |
| 90 | (match self { |
| 91 | SomeEnum::Three(x) => x, |
| 92 | SomeEnum::Four{x} => x, |
| 93 | _ => 0 |
| 94 | }, self) |
| 95 | } |
| 96 | } |
| 97 | |
| 98 | enum SimpleEnum { |
| 99 | One, |
| 100 | Two, |
| 101 | Three |
| 102 | } |
| 103 | |
| 104 | impl SimpleEnum { |
| 105 | fn value(&self) -> i32 { |
| 106 | match *self { |
| 107 | SimpleEnum::One => 1, |
| 108 | SimpleEnum::Two => 2, |
| 109 | SimpleEnum::Three => 452, |
| 110 | } |
| 111 | } |
| 112 | } |
| 113 | |
| 114 | fn main() { |
| 115 | let mut a = SomeEnum::Three(23); |
| 116 | let av = a.value(); |
| 117 | let amv = (&mut a).mut_value(); |
| 118 | let atv = a.take_value(); |
| 119 | let b = SomeEnum::Four{x: 24}; |
| 120 | let bv = b.value(); |
| 121 | let c = SimpleEnum::Three; |
| 122 | let d = c.value(); |
| 123 | let mut x = HasMethods::new(); |
| 124 | x.incr(); // set breakpoint 1 here |
| 125 | (&mut x).incr(); |
| 126 | let y = 23i32.whatever(); |
| 127 | println!("{}", y); |
| 128 | let z = x.take(); |
| 129 | } |