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Implement more useful traits in Slot type #1595

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Sep 25, 2023
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Implement more useful traits in Slot type #1595

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22 changes: 21 additions & 1 deletion substrate/primitives/consensus/slots/src/lib.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -24,7 +24,7 @@ use scale_info::TypeInfo;
use sp_timestamp::Timestamp;

/// Unit type wrapper that represents a slot.
#[derive(Debug, Encode, MaxEncodedLen, Decode, Eq, Clone, Copy, Default, Ord, TypeInfo)]
#[derive(Debug, Encode, MaxEncodedLen, Decode, Eq, Clone, Copy, Default, Ord, Hash, TypeInfo)]
#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
pub struct Slot(u64);

Expand All @@ -44,6 +44,26 @@ impl core::ops::Add for Slot {
}
}

impl core::ops::Sub for Slot {
type Output = Self;

fn sub(self, other: Self) -> Self {
Self(self.0 - other.0)
}
}

impl core::ops::AddAssign for Slot {
fn add_assign(&mut self, rhs: Self) {
self.0 += rhs.0
}
}

impl core::ops::SubAssign for Slot {
fn sub_assign(&mut self, rhs: Self) {
self.0 -= rhs.0
}
}

impl core::ops::Add<u64> for Slot {
type Output = Self;

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