Sum in std::iter - Rust (original) (raw)

Trait std::iter::Sum

1.12.0· source · [−]

pub trait Sum<A = Self> {
    fn sum<I>(iter: I) -> Self
    where
        I: Iterator<Item = A>;
}

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.