pub trait Sum<A = Self>: Sized {
fn sum<I: Iterator<Item = A>>(iter: I) -> Self;
}
Expand description
Trait to represent types that can be created by summing up an iterator.
This trait is used to implement Iterator::sum(). Types which implement
this trait can be generated by using the sum() method on an iterator.
Like FromIterator, this trait should rarely be called directly.
Method which takes an iterator and generates Self from the elements by
“summing up” the items.
impl Sum<isize> for isize
impl Sum<usize> for usize
impl<'a> Sum<&'a f32> for f32
impl<'a> Sum<&'a f64> for f64
impl<'a> Sum<&'a i8> for i8
impl<'a> Sum<&'a i16> for i16
impl<'a> Sum<&'a i32> for i32
impl<'a> Sum<&'a i64> for i64
impl<'a> Sum<&'a i128> for i128
impl<'a> Sum<&'a isize> for isize
impl<'a> Sum<&'a u8> for u8
impl<'a> Sum<&'a u16> for u16
impl<'a> Sum<&'a u32> for u32
impl<'a> Sum<&'a u64> for u64
impl<'a> Sum<&'a u128> for u128
impl<'a> Sum<&'a usize> for usize