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Fix Unusable Sink Implementation on Scan #2499

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merged 1 commit into from
Sep 18, 2021

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drewkett
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The Sink implementation for futures::stream::Scan has generic bounds on it that require the stream and state types on Scan to be the same type, which naturally makes it not useful to use the implementation. This change adds an extra generic to the Sink implementation to separate out the type of the state argument in Scan.

The current Sink implementation on stream::Scan requires the stream and
state types are the same which doesn't practically allow that
implementation to be used. This adds a separate generic to the Sink
implementation for state.
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Thanks!

@taiki-e taiki-e merged commit cc670fd into rust-lang:master Sep 18, 2021
@taiki-e taiki-e added 0.3-backport: pending The maintainer accepted to backport this to the 0.3 branch, but backport has not been done yet. A-stream Area: futures::stream labels Nov 22, 2021
taiki-e pushed a commit that referenced this pull request Nov 23, 2021
The current Sink implementation on stream::Scan requires the stream and
state types are the same which doesn't practically allow that
implementation to be used. This adds a separate generic to the Sink
implementation for state.
@taiki-e taiki-e mentioned this pull request Nov 23, 2021
@taiki-e taiki-e added 0.3-backport: completed and removed 0.3-backport: pending The maintainer accepted to backport this to the 0.3 branch, but backport has not been done yet. labels Nov 23, 2021
taiki-e pushed a commit that referenced this pull request Nov 23, 2021
The current Sink implementation on stream::Scan requires the stream and
state types are the same which doesn't practically allow that
implementation to be used. This adds a separate generic to the Sink
implementation for state.
taiki-e pushed a commit that referenced this pull request Nov 23, 2021
The current Sink implementation on stream::Scan requires the stream and
state types are the same which doesn't practically allow that
implementation to be used. This adds a separate generic to the Sink
implementation for state.
@taiki-e taiki-e mentioned this pull request Nov 23, 2021
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taiki-e commented Nov 23, 2021

Published in 0.3.18.

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2 participants