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

Trait std::iter::Sum

1.12.0 · source ·

pub trait Sum<A = Self>: Sized {
    // Required method
    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.

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Method which takes an iterator and generates Self from the elements by “summing up” the items.

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