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Remove Option from TokenStream #65261

Merged
merged 3 commits into from
Oct 15, 2019
Merged

Remove Option from TokenStream #65261

merged 3 commits into from
Oct 15, 2019

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nnethercote
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A code simplification.

r? @petrochenkov

@rust-highfive rust-highfive added the S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. label Oct 10, 2019
@nnethercote
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@bors try @rust-timer queue

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bors commented Oct 10, 2019

⌛ Trying commit 2ab66c543bea042971bb502c19471ec6827c625e with merge 310497755aba58c78b873085b89172ca0a8b0cdc...

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bors commented Oct 10, 2019

☀️ Try build successful - checks-azure
Build commit: 310497755aba58c78b873085b89172ca0a8b0cdc (310497755aba58c78b873085b89172ca0a8b0cdc)

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mati865 commented Oct 10, 2019

This perf seems to be missing from perf.rlo queue, maybe bot was down while you were scheduling.

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@rust-timer build 310497755aba58c78b873085b89172ca0a8b0cdc

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Queued 310497755aba58c78b873085b89172ca0a8b0cdc with parent aa45e03, future comparison URL.

@petrochenkov petrochenkov added S-waiting-on-perf Status: Waiting on a perf run to be completed. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Oct 10, 2019
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Finished benchmarking try commit 310497755aba58c78b873085b89172ca0a8b0cdc, comparison URL.

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Finished benchmarking try commit 3104977, comparison URL.

Two hours later, I get "could not find commit by bound Commit("aa45e032d96f1785581d336170e6dc35d5f1cb65"), start=true" when I visit the link. rust-timer is really struggling lately :(

cc @Mark-Simulacrum

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mati865 commented Oct 11, 2019

I guess timer bot doesn't check whether TryParent has finished.

Results are available but it's mostly noise.

@petrochenkov petrochenkov added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. and removed S-waiting-on-perf Status: Waiting on a perf run to be completed. labels Oct 11, 2019
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Results are available but it's mostly noise.

Thanks for letting me know. Noise is good in this case; it shows that it doesn't hurt performance.

petrochenkov
petrochenkov reviewed Oct 11, 2019
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src/libsyntax/tokenstream.rs Outdated Show resolved Hide resolved
src/libsyntax/tokenstream.rs Outdated Show resolved Hide resolved
@petrochenkov petrochenkov added S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Oct 11, 2019
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LGTM, just a couple of nits.

@nnethercote
Remove the Option in TokenStream.
5c93492 
It means an allocation is required to create an empty `TokenStream`, but
all other operations are simpler and marginally faster due to not having
to check for `None`. Overall it simplifies the code for a negligible
performance effect.

The commit also removes `TokenStream::empty` by implementing `Default`,
which is now possible.
@nnethercote
Use TokenStream::default() in more places.
1ce0347
@nnethercote
Lazify some mac_placeholder() calls.
18b48bf 
This avoids some unnecessary creation of empty token streams.
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@petrochenkov: New code is up, with nits addressed.

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@bors r+

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bors commented Oct 14, 2019

📌 Commit 18b48bf has been approved by petrochenkov

@bors bors removed the S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. label Oct 14, 2019
@bors bors added the S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. label Oct 14, 2019
Centril added a commit to Centril/rust that referenced this pull request Oct 14, 2019
@Centril
Rollup merge of rust-lang#65261 - nnethercote:rm-Option-from-TokenStr…
ed9d45b 
…eam, r=petrochenkov

Remove `Option` from `TokenStream`

A code simplification.

r? @petrochenkov
@Centril Centril mentioned this pull request Oct 14, 2019
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tmandry added a commit to tmandry/rust that referenced this pull request Oct 15, 2019
@tmandry
Rollup merge of rust-lang#65261 - nnethercote:rm-Option-from-TokenStr…
6d28ed1 
…eam, r=petrochenkov

Remove `Option` from `TokenStream`

A code simplification.

r? @petrochenkov
@tmandry tmandry mentioned this pull request Oct 15, 2019
Merged
bors added a commit that referenced this pull request Oct 15, 2019
@bors
Auto merge of #65422 - tmandry:rollup-r5u3mlc, r=tmandry
e369d87 
Rollup of 10 pull requests

Successful merges:

 - #65170 (rustc_metadata: Privatize private code and remove dead code)
 - #65260 (Optimize `LexicalResolve::expansion`.)
 - #65261 (Remove `Option` from `TokenStream`)
 - #65332 (std::fmt: reorder docs)
 - #65340 (Several changes to the codegen backend organization)
 - #65365 (Include const generic arguments in metadata)
 - #65398 (Bring attention to suggestions when the only difference is capitalization)
 - #65410 (syntax: add parser recovery for intersection- / and-patterns `p1 @ p2`)
 - #65415 (Remove an outdated test output file)
 - #65416 (Minor sync changes)

Failed merges:

r? @ghost
@bors bors merged commit 18b48bf into rust-lang:master Oct 15, 2019
@nnethercote nnethercote deleted the rm-Option-from-TokenStream branch October 15, 2019 05:40
@nnethercote nnethercote mentioned this pull request Oct 15, 2019
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