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1 file changed, 152 insertions
traits.rs(file created)
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| 1 | + | #[derive(Debug)] | |
| 2 | + | enum WeaponType { | |
| 3 | + | Sword, | |
| 4 | + | Club, | |
| 5 | + | } | |
| 6 | + | ||
| 7 | + | #[derive(Debug)] | |
| 8 | + | struct WeaponComp { | |
| 9 | + | weapon: WeaponType, | |
| 10 | + | power: i32, | |
| 11 | + | } | |
| 12 | + | ||
| 13 | + | #[derive(Debug)] | |
| 14 | + | struct HealthComp { | |
| 15 | + | health: i32, | |
| 16 | + | } | |
| 17 | + | ||
| 18 | + | trait HealthTrait { | |
| 19 | + | fn hurt(&mut self, amount: i32); | |
| 20 | + | fn heal(&mut self, amount: i32); | |
| 21 | + | } | |
| 22 | + | ||
| 23 | + | impl HealthTrait for HealthComp { | |
| 24 | + | fn hurt(&mut self, amount: i32) { | |
| 25 | + | self.health -= amount; | |
| 26 | + | } | |
| 27 | + | ||
| 28 | + | fn heal(&mut self, amount: i32) { | |
| 29 | + | self.health += amount; | |
| 30 | + | } | |
| 31 | + | } | |
| 32 | + | ||
| 33 | + | #[derive(Debug)] | |
| 34 | + | struct Player { | |
| 35 | + | health_comp: HealthComp, | |
| 36 | + | weapon_comp: WeaponComp, | |
| 37 | + | } | |
| 38 | + | ||
| 39 | + | impl AsRef<HealthComp> for Player { | |
| 40 | + | fn as_ref(&self) -> &HealthComp { | |
| 41 | + | &self.health_comp | |
| 42 | + | } | |
| 43 | + | } | |
| 44 | + | ||
| 45 | + | impl AsMut<HealthComp> for Player { | |
| 46 | + | fn as_mut(&mut self) -> &mut HealthComp { | |
| 47 | + | &mut self.health_comp | |
| 48 | + | } | |
| 49 | + | } | |
| 50 | + | ||
| 51 | + | impl AsRef<WeaponComp> for Player { | |
| 52 | + | fn as_ref(&self) -> &WeaponComp { | |
| 53 | + | &self.weapon_comp | |
| 54 | + | } | |
| 55 | + | } | |
| 56 | + | ||
| 57 | + | impl AsMut<WeaponComp> for Player { | |
| 58 | + | fn as_mut(&mut self) -> &mut WeaponComp { | |
| 59 | + | &mut self.weapon_comp | |
| 60 | + | } | |
| 61 | + | } | |
| 62 | + | ||
| 63 | + | #[derive(Debug)] | |
| 64 | + | struct Enemy { | |
| 65 | + | health_comp: HealthComp, | |
| 66 | + | weapon_comp: WeaponComp, | |
| 67 | + | } | |
| 68 | + | ||
| 69 | + | impl AsRef<HealthComp> for Enemy { | |
| 70 | + | fn as_ref(&self) -> &HealthComp { | |
| 71 | + | &self.health_comp | |
| 72 | + | } | |
| 73 | + | } | |
| 74 | + | ||
| 75 | + | impl AsMut<HealthComp> for Enemy { | |
| 76 | + | fn as_mut(&mut self) -> &mut HealthComp { | |
| 77 | + | &mut self.health_comp | |
| 78 | + | } | |
| 79 | + | } | |
| 80 | + | ||
| 81 | + | impl AsRef<WeaponComp> for Enemy { | |
| 82 | + | fn as_ref(&self) -> &WeaponComp { | |
| 83 | + | &self.weapon_comp | |
| 84 | + | } | |
| 85 | + | } | |
| 86 | + | ||
| 87 | + | impl AsMut<WeaponComp> for Enemy { | |
| 88 | + | fn as_mut(&mut self) -> &mut WeaponComp { | |
| 89 | + | &mut self.weapon_comp | |
| 90 | + | } | |
| 91 | + | } | |
| 92 | + | ||
| 93 | + | trait AttackTrait<T> | |
| 94 | + | where | |
| 95 | + | T: AsRef<WeaponComp> + AsRef<HealthComp> + AsMut<WeaponComp> + AsMut<HealthComp>, | |
| 96 | + | Self: AsRef<WeaponComp> + AsRef<HealthComp> + AsMut<WeaponComp> + AsMut<HealthComp>, | |
| 97 | + | { | |
| 98 | + | fn attack(&self, other: &mut T) { | |
| 99 | + | let weapon: &WeaponComp = self.as_ref(); | |
| 100 | + | let target: &mut HealthComp = other.as_mut(); | |
| 101 | + | ||
| 102 | + | target.hurt(weapon.power); | |
| 103 | + | } | |
| 104 | + | ||
| 105 | + | fn parry(&mut self, other: &mut T) { | |
| 106 | + | let attack_power = AsRef::<WeaponComp>::as_ref(&other).power; | |
| 107 | + | let defence_power = AsRef::<WeaponComp>::as_ref(&self).power; | |
| 108 | + | ||
| 109 | + | let mut target: &mut HealthComp = if defence_power > attack_power { | |
| 110 | + | other.as_mut() | |
| 111 | + | } else { | |
| 112 | + | self.as_mut() | |
| 113 | + | }; | |
| 114 | + | ||
| 115 | + | target.hurt((attack_power - defence_power).abs()); | |
| 116 | + | } | |
| 117 | + | } | |
| 118 | + | ||
| 119 | + | impl<T> AttackTrait<T> for Enemy where | |
| 120 | + | T: AsRef<WeaponComp> + AsRef<HealthComp> + AsMut<WeaponComp> + AsMut<HealthComp> | |
| 121 | + | { | |
| 122 | + | } | |
| 123 | + | ||
| 124 | + | impl<T> AttackTrait<T> for Player where | |
| 125 | + | T: AsRef<WeaponComp> + AsRef<HealthComp> + AsMut<WeaponComp> + AsMut<HealthComp> | |
| 126 | + | { | |
| 127 | + | } | |
| 128 | + | ||
| 129 | + | fn main() { | |
| 130 | + | let mut player = Player { | |
| 131 | + | health_comp: HealthComp { health: 10 }, | |
| 132 | + | weapon_comp: WeaponComp { | |
| 133 | + | weapon: WeaponType::Sword, | |
| 134 | + | power: 5, | |
| 135 | + | }, | |
| 136 | + | }; | |
| 137 | + | ||
| 138 | + | let mut enemy = Enemy { | |
| 139 | + | health_comp: HealthComp { health: 10 }, | |
| 140 | + | weapon_comp: WeaponComp { | |
| 141 | + | weapon: WeaponType::Sword, | |
| 142 | + | power: 2, | |
| 143 | + | }, | |
| 144 | + | }; | |
| 145 | + | ||
| 146 | + | <Player as AsMut<HealthComp>>::as_mut(&mut player).hurt(5); | |
| 147 | + | <Enemy as AsMut<HealthComp>>::as_mut(&mut enemy).hurt(8); | |
| 148 | + | ||
| 149 | + | enemy.parry(&mut player); | |
| 150 | + | ||
| 151 | + | println!("{:?}\n {:?}", player, enemy); | |
| 152 | + | } | |
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