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Allow constructing BoundedVec from slice #944

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Merged
merged 1 commit into from
Oct 6, 2025
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Allow constructing BoundedVec from slice #944

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21 changes: 21 additions & 0 deletions bounded-collections/src/bounded_vec.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -265,6 +265,14 @@ impl<'a, T, S: Get<u32>> BoundedSlice<'a, T, S> {
pub fn truncate_from(s: &'a [T]) -> Self {
Self(&s[0..(s.len().min(S::get() as usize))], PhantomData)
}

/// Copies `self` into a new `BoundedVec`.
pub fn to_bounded_vec(self) -> BoundedVec<T, S>
where
T: Clone,
{
BoundedVec(self.0.to_vec(), PhantomData)
}
}

impl<T, S> BoundedVec<T, S> {
Expand Down Expand Up @@ -685,6 +693,19 @@ impl<T, S: Get<u32>> TryFrom<Vec<T>> for BoundedVec<T, S> {
}
}

impl<'a, T: Clone, S: Get<u32>> TryFrom<&'a [T]> for BoundedVec<T, S> {
type Error = ();

fn try_from(t: &'a [T]) -> Result<Self, Self::Error> {
if t.len() <= Self::bound() {
// explicit check just above
Ok(Self::unchecked_from(t.to_vec()))
} else {
Err(())
}
}
}

impl<T, S: Get<u32>> TruncateFrom<Vec<T>> for BoundedVec<T, S> {
fn truncate_from(unbound: Vec<T>) -> Self {
BoundedVec::<T, S>::truncate_from(unbound)
Expand Down
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