# 1.12.0[−][src]Trait core::iter::Product

    pub trait Product<A = Self>: Sized {
        fn product<I: Iterator<Item = A>>(iter: I) -> Self;
    }

Trait to represent types that can be created by multiplying elements of an iterator.

This trait is used to implement the `product` method on iterators. Types which implement the trait can be generated by the `product` method. Like `FromIterator` this trait should rarely be called directly and instead interacted with through `Iterator::product`.

## Required Methods

### `fn product<I: Iterator<Item = A>>(iter: I) -> Self`

Method which takes an iterator and generates `Self` from the elements by multiplying the items.

## Implementors

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`impl Product<Wrapping<i128>> for Wrapping<i128>`

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`fn product<I: Iterator<Item = Wrapping<i128>>>(iter: I) -> Wrapping<i128>`

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`impl Product<Wrapping<i16>> for Wrapping<i16>`

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`fn product<I: Iterator<Item = Wrapping<i16>>>(iter: I) -> Wrapping<i16>`

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`impl Product<Wrapping<i32>> for Wrapping<i32>`

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`fn product<I: Iterator<Item = Wrapping<i32>>>(iter: I) -> Wrapping<i32>`

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`impl Product<Wrapping<i64>> for Wrapping<i64>`

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`fn product<I: Iterator<Item = Wrapping<i64>>>(iter: I) -> Wrapping<i64>`

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`impl Product<Wrapping<i8>> for Wrapping<i8>`

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`fn product<I: Iterator<Item = Wrapping<i8>>>(iter: I) -> Wrapping<i8>`

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`impl Product<Wrapping<isize>> for Wrapping<isize>`

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`fn product<I: Iterator<Item = Wrapping<isize>>>(iter: I) -> Wrapping<isize>`

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`impl Product<Wrapping<u128>> for Wrapping<u128>`

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`fn product<I: Iterator<Item = Wrapping<u128>>>(iter: I) -> Wrapping<u128>`

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`impl Product<Wrapping<u16>> for Wrapping<u16>`

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`fn product<I: Iterator<Item = Wrapping<u16>>>(iter: I) -> Wrapping<u16>`

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`impl Product<Wrapping<u32>> for Wrapping<u32>`

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`fn product<I: Iterator<Item = Wrapping<u32>>>(iter: I) -> Wrapping<u32>`

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`impl Product<Wrapping<u64>> for Wrapping<u64>`

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`fn product<I: Iterator<Item = Wrapping<u64>>>(iter: I) -> Wrapping<u64>`

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`impl Product<Wrapping<u8>> for Wrapping<u8>`

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`fn product<I: Iterator<Item = Wrapping<u8>>>(iter: I) -> Wrapping<u8>`

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`impl Product<Wrapping<usize>> for Wrapping<usize>`

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`fn product<I: Iterator<Item = Wrapping<usize>>>(iter: I) -> Wrapping<usize>`

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`impl Product<f32> for f32`

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`fn product<I: Iterator<Item = f32>>(iter: I) -> f32`

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`impl Product<f64> for f64`

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`fn product<I: Iterator<Item = f64>>(iter: I) -> f64`

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`impl Product<i128> for i128`

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`fn product<I: Iterator<Item = i128>>(iter: I) -> i128`

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`impl Product<i16> for i16`

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`fn product<I: Iterator<Item = i16>>(iter: I) -> i16`

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`impl Product<i32> for i32`

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`fn product<I: Iterator<Item = i32>>(iter: I) -> i32`

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`impl Product<i64> for i64`

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`fn product<I: Iterator<Item = i64>>(iter: I) -> i64`

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`impl Product<i8> for i8`

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`fn product<I: Iterator<Item = i8>>(iter: I) -> i8`

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`impl Product<isize> for isize`

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`fn product<I: Iterator<Item = isize>>(iter: I) -> isize`

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###

`impl Product<u128> for u128`

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`fn product<I: Iterator<Item = u128>>(iter: I) -> u128`

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###

`impl Product<u16> for u16`

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`fn product<I: Iterator<Item = u16>>(iter: I) -> u16`

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`impl Product<u32> for u32`

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`fn product<I: Iterator<Item = u32>>(iter: I) -> u32`

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`impl Product<u64> for u64`

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`fn product<I: Iterator<Item = u64>>(iter: I) -> u64`

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`impl Product<u8> for u8`

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`fn product<I: Iterator<Item = u8>>(iter: I) -> u8`

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`impl Product<usize> for usize`

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`fn product<I: Iterator<Item = usize>>(iter: I) -> usize`

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###

`impl<'a> Product<&'a Wrapping<i128>> for Wrapping<i128>`

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####

`fn product<I: Iterator<Item = &'a Wrapping<i128>>>(iter: I) -> Wrapping<i128>`

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###

`impl<'a> Product<&'a Wrapping<i16>> for Wrapping<i16>`

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`fn product<I: Iterator<Item = &'a Wrapping<i16>>>(iter: I) -> Wrapping<i16>`

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`impl<'a> Product<&'a Wrapping<i32>> for Wrapping<i32>`

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`fn product<I: Iterator<Item = &'a Wrapping<i32>>>(iter: I) -> Wrapping<i32>`

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`impl<'a> Product<&'a Wrapping<i64>> for Wrapping<i64>`

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`fn product<I: Iterator<Item = &'a Wrapping<i64>>>(iter: I) -> Wrapping<i64>`

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###

`impl<'a> Product<&'a Wrapping<i8>> for Wrapping<i8>`

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`fn product<I: Iterator<Item = &'a Wrapping<i8>>>(iter: I) -> Wrapping<i8>`

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`impl<'a> Product<&'a Wrapping<isize>> for Wrapping<isize>`

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`fn product<I: Iterator<Item = &'a Wrapping<isize>>>(iter: I) -> Wrapping<isize>`

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`impl<'a> Product<&'a Wrapping<u128>> for Wrapping<u128>`

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`fn product<I: Iterator<Item = &'a Wrapping<u128>>>(iter: I) -> Wrapping<u128>`

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`impl<'a> Product<&'a Wrapping<u16>> for Wrapping<u16>`

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`fn product<I: Iterator<Item = &'a Wrapping<u16>>>(iter: I) -> Wrapping<u16>`

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`impl<'a> Product<&'a Wrapping<u32>> for Wrapping<u32>`

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`fn product<I: Iterator<Item = &'a Wrapping<u32>>>(iter: I) -> Wrapping<u32>`

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`impl<'a> Product<&'a Wrapping<u64>> for Wrapping<u64>`

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`fn product<I: Iterator<Item = &'a Wrapping<u64>>>(iter: I) -> Wrapping<u64>`

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`impl<'a> Product<&'a Wrapping<u8>> for Wrapping<u8>`

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`fn product<I: Iterator<Item = &'a Wrapping<u8>>>(iter: I) -> Wrapping<u8>`

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`impl<'a> Product<&'a Wrapping<usize>> for Wrapping<usize>`

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`fn product<I: Iterator<Item = &'a Wrapping<usize>>>(iter: I) -> Wrapping<usize>`

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###

`impl<'a> Product<&'a f32> for f32`

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####

`fn product<I: Iterator<Item = &'a f32>>(iter: I) -> f32`

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###

`impl<'a> Product<&'a f64> for f64`

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####

`fn product<I: Iterator<Item = &'a f64>>(iter: I) -> f64`

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###

`impl<'a> Product<&'a i128> for i128`

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####

`fn product<I: Iterator<Item = &'a i128>>(iter: I) -> i128`

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###

`impl<'a> Product<&'a i16> for i16`

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####

`fn product<I: Iterator<Item = &'a i16>>(iter: I) -> i16`

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###

`impl<'a> Product<&'a i32> for i32`

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####

`fn product<I: Iterator<Item = &'a i32>>(iter: I) -> i32`

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###

`impl<'a> Product<&'a i64> for i64`

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####

`fn product<I: Iterator<Item = &'a i64>>(iter: I) -> i64`

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###

`impl<'a> Product<&'a i8> for i8`

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`fn product<I: Iterator<Item = &'a i8>>(iter: I) -> i8`

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`impl<'a> Product<&'a isize> for isize`

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`fn product<I: Iterator<Item = &'a isize>>(iter: I) -> isize`

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###

`impl<'a> Product<&'a u128> for u128`

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####

`fn product<I: Iterator<Item = &'a u128>>(iter: I) -> u128`

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`impl<'a> Product<&'a u16> for u16`

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`fn product<I: Iterator<Item = &'a u16>>(iter: I) -> u16`

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`impl<'a> Product<&'a u32> for u32`

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`fn product<I: Iterator<Item = &'a u32>>(iter: I) -> u32`

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`impl<'a> Product<&'a u64> for u64`

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`fn product<I: Iterator<Item = &'a u64>>(iter: I) -> u64`

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`impl<'a> Product<&'a u8> for u8`

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`fn product<I: Iterator<Item = &'a u8>>(iter: I) -> u8`

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`impl<'a> Product<&'a usize> for usize`

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`fn product<I: Iterator<Item = &'a usize>>(iter: I) -> usize`

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`impl<T, U, E> Product<Result<U, E>> for Result<T, E> where T: Product<U>,`

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`fn product<I>(iter: I) -> Result<T, E> where I: Iterator<Item = Result<U, E>>,`

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Takes each element in the `Iterator`: if it is an `Err`, no further elements are taken, and the `Err` is returned. Should no `Err` occur, the product of all elements is returned.

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