Enum HpChangeCause 

pub enum HpChangeCause<P: EffectProvider + ?Sized> {
    Status(P::Status),
    Volatile(P::EffectStateKind),
}

Why a battler’s HP changed — carried on TurnEvent::Damaged / TurnEvent::Healed so a game can narrate residual ticks distinctly (“hurt by POISON!”, “sapped by LEECH SEED!”). None (the default) means ordinary move damage/heal — today’s behaviour, unchanged. The engine records only what it holds at the residual fire site: the non-volatile Status, or the volatile’s opaque EffectStateKind for a volatile-hosted residual — the game maps that token back to the concrete volatile (Toxic / Leech Seed / …). Engine-agnostic: the engine stores the token but never interprets it (symmetric with the Status variant).

Variants

Status(P::Status)

A non-volatile status residual (Gen-1 burn / poison chip).

Volatile(P::EffectStateKind)

A volatile-effect residual, carrying the game’s opaque per-volatile token (EffectStateKind) so the game can tell WHICH volatile ticked — Toxic ramp vs Leech Seed sap vs Bide unleash.

Trait Implementations

impl<P: EffectProvider + ?Sized> Clone for HpChangeCause<P>

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<P: EffectProvider + ?Sized> Debug for HpChangeCause<P>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.