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macros: fix mut patterns in select! macro #4211

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merged 2 commits into from
Nov 2, 2021
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@Darksonn Darksonn commented Nov 2, 2021

Closes: #4182
Closes: #4076

@Darksonn Darksonn added A-tokio-macros Area: The tokio-macros crate A-tokio Area: The main tokio crate M-macros Module: macros in the main Tokio crate labels Nov 2, 2021
@Darksonn Darksonn requested a review from carllerche November 2, 2021 14:23
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Darksonn commented Nov 2, 2021

I am rather confident that this cannot be done without a new proc-macro. I spent some time trying to restructure the macro to avoid matching twice, but I was unable to because we need the futures variable to go out of scope before the success handlers run.

@Darksonn Darksonn requested a review from LucioFranco November 2, 2021 15:40
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I'll take a look. We probably want @taiki-e to 👀 at it as well.

@carllerche carllerche requested a review from taiki-e November 2, 2021 16:09
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@Darksonn is there a downside for the user to a new proc macro?

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Looks fine to me. I would love it if @taiki-e could take a glance, but nothing stands out to me.

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LGTM

@Darksonn Darksonn merged commit 94ee305 into master Nov 2, 2021
@Darksonn Darksonn deleted the select-pattern-fix branch November 2, 2021 17:05
hawkw added a commit that referenced this pull request Nov 15, 2021
# 1.14.0 (November 15, 2021)

### Fixed

- macros: fix compiler errors when using `mut` patterns in `select!`
  ([#4211])
- sync: fix a data race between `oneshot::Sender::send` and awaiting a
  `oneshot::Receiver` when the oneshot has been closed ([#4226])
- sync: make `AtomicWaker` panic safe ([#3689])
- runtime: fix basic scheduler dropping tasks outside a runtime context
  ([#4213])

### Added

- stats: add `RuntimeStats::busy_duration_total` ([#4179], [#4223])

### Changed

- io: updated `copy` buffer size to match `std::io::copy` ([#4209])

### Documented

- io: rename buffer to file in doc-test ([#4230])
- sync: fix Notify example ([#4212])

[#4211]: #4211
[#4226]: #4226
[#3689]: #3689
[#4213]: #4213
[#4179]: #4179
[#4223]: #4223
[#4209]: #4209
[#4230]: #4230
[#4212]: #4212
hawkw added a commit that referenced this pull request Nov 16, 2021
# 1.14.0 (November 15, 2021)

### Fixed

- macros: fix compiler errors when using `mut` patterns in `select!`
  ([#4211])
- sync: fix a data race between `oneshot::Sender::send` and awaiting a
  `oneshot::Receiver` when the oneshot has been closed ([#4226])
- sync: make `AtomicWaker` panic safe ([#3689])
- runtime: fix basic scheduler dropping tasks outside a runtime context
  ([#4213])

### Added

- stats: add `RuntimeStats::busy_duration_total` ([#4179], [#4223])

### Changed

- io: updated `copy` buffer size to match `std::io::copy` ([#4209])

### Documented

- io: rename buffer to file in doc-test ([#4230])
- sync: fix Notify example ([#4212])

[#4211]: #4211
[#4226]: #4226
[#3689]: #3689
[#4213]: #4213
[#4179]: #4179
[#4223]: #4223
[#4209]: #4209
[#4230]: #4230
[#4212]: #4212
hawkw added a commit that referenced this pull request Nov 16, 2021
# 1.14.0 (November 15, 2021)

### Fixed

- macros: fix compiler errors when using `mut` patterns in `select!`
  ([#4211])
- sync: fix a data race between `oneshot::Sender::send` and awaiting a
  `oneshot::Receiver` when the oneshot has been closed ([#4226])
- sync: make `AtomicWaker` panic safe ([#3689])
- runtime: fix basic scheduler dropping tasks outside a runtime context
  ([#4213])

### Added

- stats: add `RuntimeStats::busy_duration_total` ([#4179], [#4223])

### Changed

- io: updated `copy` buffer size to match `std::io::copy` ([#4209])

### Documented

- io: rename buffer to file in doc-test ([#4230])
- sync: fix Notify example ([#4212])

[#4211]: #4211
[#4226]: #4226
[#3689]: #3689
[#4213]: #4213
[#4179]: #4179
[#4223]: #4223
[#4209]: #4209
[#4230]: #4230
[#4212]: #4212
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