Struct EnumMap

Source

pub struct EnumMap<K, V> { /* private fields */ }

Expand description

A map from enum-like keys to values, backed by a Vec of (K, V) pairs.

Designed for use with small, game-specific enums (e.g. stat IDs, type IDs). Lookups are O(n) linear scan — acceptable for N ≤ 15.

§Type Parameters

K — Key type, typically a copyable game-enum variant (Copy + PartialEq).
V — Value type.

Implementations§

Source §

impl<K: PartialEq, V> EnumMap<K, V>

Source

pub fn new() -> Self

Create an empty map.

Examples found in repository ?

examples/hello_dotzuki.rs (line 174)

169    fn create_monster(&self, species: Species, level: u8) -> BattlerState<Self> {
170        let (hp, atk, def, spd, moves) = match species {
171            Species::Warrior => (100u16, 15u16, 10u16, 8u16, vec![MoveKind::Slash]),
172            Species::Mage => (80u16, 20u16, 5u16, 12u16, vec![MoveKind::Fireball]),
173        };
174        let mut stats = EnumMap::new();
175        stats.set(StatId::HP, hp);
176        stats.set(StatId::ATK, atk);
177        stats.set(StatId::DEF, def);
178        stats.set(StatId::SPD, spd + level as u16);
179        BattlerState::new(species, hp, hp, stats, moves)
180    }

Source

pub fn set(&mut self, key: K, value: V)

Insert or update a key-value pair.

Examples found in repository ?

examples/hello_dotzuki.rs (line 175)

169    fn create_monster(&self, species: Species, level: u8) -> BattlerState<Self> {
170        let (hp, atk, def, spd, moves) = match species {
171            Species::Warrior => (100u16, 15u16, 10u16, 8u16, vec![MoveKind::Slash]),
172            Species::Mage => (80u16, 20u16, 5u16, 12u16, vec![MoveKind::Fireball]),
173        };
174        let mut stats = EnumMap::new();
175        stats.set(StatId::HP, hp);
176        stats.set(StatId::ATK, atk);
177        stats.set(StatId::DEF, def);
178        stats.set(StatId::SPD, spd + level as u16);
179        BattlerState::new(species, hp, hp, stats, moves)
180    }

Source

pub fn get(&self, key: K) -> Option<&V>

Look up a value by key. Returns None if the key is not present.

Examples found in repository ?

examples/hello_dotzuki.rs (line 136)

132    fn calculate_damage(
133        &self, move_: &MoveKind, attacker: &BattlerState<Self>,
134        defender: &BattlerState<Self>, _random: u8, _is_critical: bool,
135    ) -> DamageResult {
136        let atk = attacker.stats.get(StatId::ATK).copied().unwrap_or(10);
137        let def = defender.stats.get(StatId::DEF).copied().unwrap_or(5).max(1);
138        let eff = HelloConfig::effectiveness(&move_.element(), &[defender.species.element()]);
139        let raw = (move_.power() as f32 * eff * atk as f32 / def as f32) as u16;
140        DamageResult { damage: raw.max(1), effectiveness: eff, is_miss: false }
141    }