Trait core::iter::Sum

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

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§

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

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

Implementors§

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impl Sum<f32> for f32

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impl Sum<f64> for f64

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impl Sum<i8> for i8

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impl Sum<i16> for i16

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impl Sum<i32> for i32

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impl Sum<i64> for i64

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impl Sum<i128> for i128

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impl Sum<isize> for isize

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impl Sum<u8> for u8

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impl Sum<u16> for u16

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impl Sum<u32> for u32

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impl Sum<u64> for u64

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impl Sum<u128> for u128

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impl Sum<usize> for usize

1.14.0 · source§

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

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

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

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

1.14.0 · source§

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

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

1.14.0 · source§

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

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

1.14.0 · source§

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

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

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

1.14.0 · source§

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

1.16.0 · source§

impl Sum<Duration> for Duration

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impl<'a> Sum<&'a f32> for f32

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impl<'a> Sum<&'a f64> for f64

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

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

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

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

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

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

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

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

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

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

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

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

1.14.0 · source§

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

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

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

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

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

1.14.0 · source§

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

1.14.0 · source§

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

1.14.0 · source§

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

1.14.0 · source§

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

1.14.0 · source§

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

1.16.0 · source§

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

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

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

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

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

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

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

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

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

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

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

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

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