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Add "parallel" iter::empty() and iter::once() #464

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cuviper commented Oct 24, 2017

These are simplistic producers, mirroring their std namesakes. They
are essentially just optimized equivalents to iterating None and
Some(x), where empty() is a ZST, once() doesn't need the enum tag
for an Option, and neither have the associated enum branches.
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Add "parallel" iter::empty() and iter::once() 
These are simplistic producers, mirroring their `std` namesakes.  They
are essentially just optimized equivalents to iterating `None` and
`Some(x)`, where `empty()` is a ZST, `once()` doesn't need the enum tag
for an `Option`, and neither have the associated enum branches.
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cuviper commented Oct 24, 2017

I need to add docs before we merge this.
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cuviper commented Nov 2, 2017

bors r+

bors bot added a commit that referenced this pull request Nov 2, 2017

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Merge #464 
464: Add "parallel" iter::empty() and iter::once() r=cuviper a=cuviper

These are simplistic producers, mirroring their `std` namesakes.  They
are essentially just optimized equivalents to iterating `None` and
`Some(x)`, where `empty()` is a ZST, `once()` doesn't need the enum tag
for an `Option`, and neither have the associated enum branches.
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bors bot commented Nov 3, 2017

Build succeeded

@bors bors bot merged commit cfcc7bc into rayon-rs:master Nov 3, 2017
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@cuviper cuviper deleted the cuviper:once-empty branch Oct 18, 2018

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