Add more Default impls (#65)

* Implement Default for more types

* Add release notes

RELEASES.md

@@ -15,6 +15,7 @@
 - to better support working with multiple resource pools for a single `Abilitylike`:
   - `ready_no_cost` and `trigger_no_cost` have been added to `Abilitylike`
   - when working with multiple resource pools, you should pass in `NullPool` as the type argument for `AbilityState`
+- `Default` is now implemented for `Charges` and `Cooldown`
 
 ## Bugs (0.9)
 

src/ability_state.rs

@@ -233,7 +233,7 @@ mod tests {
 /// Used in [`AbilityState`] to get the type system to play nice when no resource pool type is needed.
 ///
 /// Values of this type should never be constructed.
-#[derive(Component)]
+#[derive(Component, Debug, Default)]
 pub struct NullPool;
 
 impl Pool for NullPool {

src/charges.rs

@@ -104,7 +104,7 @@ impl<A: Abilitylike> Default for ChargeState<A> {
 ///
 /// Charges refresh when [`Charges::refresh`] is called manually,
 /// or when the corresponding cooldown expires (if the [`InputManagerPlugin`](crate::plugin::InputManagerPlugin) is added).
-#[derive(Clone, PartialEq, Eq, Debug, Reflect)]
+#[derive(Clone, Default, PartialEq, Eq, Debug, Reflect)]
 pub struct Charges {
     current: u8,
     max: u8,
@@ -115,11 +115,12 @@ pub struct Charges {
 }
 
 /// What happens when [`Charges`] are replenished?
-#[derive(Debug, Clone, Copy, PartialEq, Eq, Reflect)]
+#[derive(Debug, Default, Clone, Copy, PartialEq, Eq, Reflect)]
 pub enum ReplenishStrategy {
     /// A single charge will be recovered.
     ///
     /// Usually paired with [`CooldownStrategy::ConstantlyRefresh`].
+    #[default]
     OneAtATime,
     /// All charges will be recovered.
     ///
@@ -128,13 +129,14 @@ pub enum ReplenishStrategy {
 }
 
 /// How do these charges replenish when cooldowns are refreshed?
-#[derive(Debug, Clone, Copy, PartialEq, Eq, Reflect)]
+#[derive(Debug, Default, Clone, Copy, PartialEq, Eq, Reflect)]
 pub enum CooldownStrategy {
     /// Cooldowns refresh will have no effect on the charges.
     Ignore,
     /// Cooldowns will replenish charges whenever the current charges are less than the max.
     ///
     /// Usually paired with [`ReplenishStrategy::OneAtATime`].
+    #[default]
     ConstantlyRefresh,
     /// Cooldowns will only replenish charges when 0 charges are available.
     ///

src/cooldown.rs

@@ -255,7 +255,7 @@ impl<A: Abilitylike> CooldownState<A> {
 /// cooldown.refresh();
 /// assert!(cooldown.ready().is_ok());
 /// ```
-#[derive(Clone, PartialEq, Eq, Debug, Serialize, Deserialize, Reflect)]
+#[derive(Clone, Default, PartialEq, Eq, Debug, Serialize, Deserialize, Reflect)]
 pub struct Cooldown {
     max_time: Duration,
     /// The amount of time that has elapsed since all [`Charges`](crate::charges::Charges) were fully replenished.