Trait std::iter::Sum

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

一个表示可以通过对迭代器求和来创建的类型的 trait。

这个 trait 用于实现 Iterator::sum()。 可以通过在迭代器上使用 sum() 方法生成实现此 trait 的类型。 和 FromIterator 一样，这个 trait 应该很少被直接调用。

Required Methods

fn sum<I>(iter: I) -> Selfwhere I: Iterator<Item = A>,

使用迭代器并通过 “summing up” 项从元素生成 Self 的方法。

Implementors

impl Sum<f32> for f32

impl Sum<f64> for f64

impl Sum<i8> for i8

impl Sum<i16> for i16

impl Sum<i32> for i32

impl Sum<i64> for i64

impl Sum<i128> for i128

impl Sum<isize> for isize

impl Sum<u8> for u8

impl Sum<u16> for u16

impl Sum<u32> for u32

impl Sum<u64> for u64

impl Sum<u128> for u128

impl Sum<usize> for usize

impl Sum<Wrapping<i8>> for Wrapping<i8>

impl Sum<Wrapping<i16>> for Wrapping<i16>

impl Sum<Wrapping<i32>> for Wrapping<i32>

impl Sum<Wrapping<i64>> for Wrapping<i64>

impl Sum<Wrapping<i128>> for Wrapping<i128>

impl Sum<Wrapping<isize>> for Wrapping<isize>

impl Sum<Wrapping<u8>> for Wrapping<u8>

impl Sum<Wrapping<u16>> for Wrapping<u16>

impl Sum<Wrapping<u32>> for Wrapping<u32>

impl Sum<Wrapping<u64>> for Wrapping<u64>

impl Sum<Wrapping<u128>> for Wrapping<u128>

impl Sum<Wrapping<usize>> for Wrapping<usize>

impl Sum<Duration> for Duration

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

impl<'a> Sum<&'a Wrapping<i8>> for Wrapping<i8>

impl<'a> Sum<&'a Wrapping<i16>> for Wrapping<i16>

impl<'a> Sum<&'a Wrapping<i32>> for Wrapping<i32>

impl<'a> Sum<&'a Wrapping<i64>> for Wrapping<i64>

impl<'a> Sum<&'a Wrapping<i128>> for Wrapping<i128>

impl<'a> Sum<&'a Wrapping<isize>> for Wrapping<isize>

impl<'a> Sum<&'a Wrapping<u8>> for Wrapping<u8>

impl<'a> Sum<&'a Wrapping<u16>> for Wrapping<u16>

impl<'a> Sum<&'a Wrapping<u32>> for Wrapping<u32>

impl<'a> Sum<&'a Wrapping<u64>> for Wrapping<u64>

impl<'a> Sum<&'a Wrapping<u128>> for Wrapping<u128>

impl<'a> Sum<&'a Wrapping<usize>> for Wrapping<usize>

impl<'a> Sum<&'a Duration> for Duration

impl<'a, const LANES: usize> Sum<&'a Simd<f32, LANES>> for Simd<f32, LANES>where LaneCount<LANES>: SupportedLaneCount,

impl<'a, const LANES: usize> Sum<&'a Simd<f64, LANES>> for Simd<f64, LANES>where LaneCount<LANES>: SupportedLaneCount,

impl<'a, const LANES: usize> Sum<&'a Simd<i8, LANES>> for Simd<i8, LANES>where LaneCount<LANES>: SupportedLaneCount,

impl<'a, const LANES: usize> Sum<&'a Simd<i16, LANES>> for Simd<i16, LANES>where LaneCount<LANES>: SupportedLaneCount,

impl<'a, const LANES: usize> Sum<&'a Simd<i32, LANES>> for Simd<i32, LANES>where LaneCount<LANES>: SupportedLaneCount,

impl<'a, const LANES: usize> Sum<&'a Simd<i64, LANES>> for Simd<i64, LANES>where LaneCount<LANES>: SupportedLaneCount,

impl<'a, const LANES: usize> Sum<&'a Simd<isize, LANES>> for Simd<isize, LANES>where LaneCount<LANES>: SupportedLaneCount,

impl<'a, const LANES: usize> Sum<&'a Simd<u8, LANES>> for Simd<u8, LANES>where LaneCount<LANES>: SupportedLaneCount,

impl<'a, const LANES: usize> Sum<&'a Simd<u16, LANES>> for Simd<u16, LANES>where LaneCount<LANES>: SupportedLaneCount,

impl<'a, const LANES: usize> Sum<&'a Simd<u32, LANES>> for Simd<u32, LANES>where LaneCount<LANES>: SupportedLaneCount,

impl<'a, const LANES: usize> Sum<&'a Simd<u64, LANES>> for Simd<u64, LANES>where LaneCount<LANES>: SupportedLaneCount,

impl<'a, const LANES: usize> Sum<&'a Simd<usize, LANES>> for Simd<usize, LANES>where LaneCount<LANES>: SupportedLaneCount,

impl<T, U> Sum<Option<U>> for Option<T>where T: Sum<U>,

impl<T, U, E> Sum<Result<U, E>> for Result<T, E>where T: Sum<U>,

impl<const LANES: usize> Sum<Simd<f32, LANES>> for Simd<f32, LANES>where LaneCount<LANES>: SupportedLaneCount,

impl<const LANES: usize> Sum<Simd<f64, LANES>> for Simd<f64, LANES>where LaneCount<LANES>: SupportedLaneCount,

impl<const LANES: usize> Sum<Simd<i8, LANES>> for Simd<i8, LANES>where LaneCount<LANES>: SupportedLaneCount,

impl<const LANES: usize> Sum<Simd<i16, LANES>> for Simd<i16, LANES>where LaneCount<LANES>: SupportedLaneCount,

impl<const LANES: usize> Sum<Simd<i32, LANES>> for Simd<i32, LANES>where LaneCount<LANES>: SupportedLaneCount,

impl<const LANES: usize> Sum<Simd<i64, LANES>> for Simd<i64, LANES>where LaneCount<LANES>: SupportedLaneCount,

impl<const LANES: usize> Sum<Simd<isize, LANES>> for Simd<isize, LANES>where LaneCount<LANES>: SupportedLaneCount,

impl<const LANES: usize> Sum<Simd<u8, LANES>> for Simd<u8, LANES>where LaneCount<LANES>: SupportedLaneCount,

impl<const LANES: usize> Sum<Simd<u16, LANES>> for Simd<u16, LANES>where LaneCount<LANES>: SupportedLaneCount,

impl<const LANES: usize> Sum<Simd<u32, LANES>> for Simd<u32, LANES>where LaneCount<LANES>: SupportedLaneCount,

impl<const LANES: usize> Sum<Simd<u64, LANES>> for Simd<u64, LANES>where LaneCount<LANES>: SupportedLaneCount,

impl<const LANES: usize> Sum<Simd<usize, LANES>> for Simd<usize, LANES>where LaneCount<LANES>: SupportedLaneCount,