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BTree: add drain methods#81075

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ssomers wants to merge 2 commits intorust-lang:masterfrom
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BTree: add drain methods#81075
ssomers wants to merge 2 commits intorust-lang:masterfrom
ssomers:btree_drain

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@ssomers ssomers commented Jan 16, 2021 •
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Implements #81074.
Builds on #93989.

@rust-highfive rust-highfive added the S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. label Jan 16, 2021
@ssomers ssomers mentioned this pull request Jan 16, 2021
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Mark-Simulacrum commented Jan 16, 2021

Is there a chance we can split this up into more commits? Reviewing a diff in a couple thousand lines is going to be quite challenging. It would be good to document any design decisions or otherwise guide my review, too.

@Mark-Simulacrum Mark-Simulacrum 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 Jan 16, 2021
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ssomers commented Jan 16, 2021

I can split off a few refactorings of existing functions, to open up for new use, but they seemed a bit pointless on their own (apart from one thing that I actually postponed).

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Mark-Simulacrum commented Jan 16, 2021

I don't really know what you postponed, but I will likely not be able to effectively review this diff without at least some guidance as to where to start or the overall vision in adding these methods.

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ssomers commented Jan 16, 2021 •
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The item I postponed is that steal_X functions (apart from their return value) are basically a hand-written optimization of the generic bulk_steal_X functions for count=1 (in reality, it went the other way around of course). It comes up here because one of the functions needed for drain is identical to handle_shrunk_node_recursively apart from that alleged optimization.

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ssomers commented Jan 16, 2021

The overall vision in adding these methods is to not copy any existing functionality, but break it up in order to reuse parts. I'll feed those refactings in a few separate PRs now.

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bors commented Jan 17, 2021

☔ The latest upstream changes (presumably #81083) made this pull request unmergeable. Please resolve the merge conflicts.

@ssomers ssomers mentioned this pull request Jan 18, 2021
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bors commented Jan 19, 2021

☔ The latest upstream changes (presumably #81169) made this pull request unmergeable. Please resolve the merge conflicts.

@ssomers ssomers mentioned this pull request Jan 25, 2021
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bors commented Jan 29, 2021

☔ The latest upstream changes (presumably #81073) made this pull request unmergeable. Please resolve the merge conflicts.

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bors commented Feb 9, 2021

☔ The latest upstream changes (presumably #81361) made this pull request unmergeable. Please resolve the merge conflicts.

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bors commented Feb 13, 2021

☔ The latest upstream changes (presumably #81494) made this pull request unmergeable. Please resolve the merge conflicts.

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bors commented Feb 15, 2021

☔ The latest upstream changes (presumably #82103) made this pull request unmergeable. Please resolve the merge conflicts.

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bors commented Feb 21, 2021

☔ The latest upstream changes (presumably #82359) made this pull request unmergeable. Please resolve the merge conflicts.

bors added a commit to rust-lang-ci/rust that referenced this pull request Feb 22, 2021
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Auto merge of rust-lang#81362 - ssomers:btree_drainy_refactor_8, r=Ma…
a15f484 
…rk-Simulacrum

BTreeMap: gather and decompose reusable tree fixing functions

This is kind of pushing it as a standalone refactor, probably only useful for rust-lang#81075 (or similar).
r? `@Mark-Simulacrum`
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bors commented Feb 22, 2021

☔ The latest upstream changes (presumably #81362) made this pull request unmergeable. Please resolve the merge conflicts.

bors added a commit to rust-lang-ci/rust that referenced this pull request Mar 1, 2021
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Auto merge of rust-lang#81094 - ssomers:btree_drainy_refactor_3, r=Ma…
3b150b7 
…rk-Simulacrum

BTreeMap: split up range_search into two stages

`range_search` expects the caller to pass the same root twice and starts searching a node for both bounds of a range. It's not very clear that in the early iterations, it searches twice in the same node. This PR splits that search up in an initial `find_leaf_edges_spanning_range` that postpones aliasing until the last second, and a second phase for continuing the search for the range in the each subtree independently (`find_lower_bound_edge` & `find_upper_bound_edge`), which greatly helps for use in rust-lang#81075. It also moves those functions over to the search module.

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ssomers commented Mar 1, 2021

@rustbot label: -S-waiting-on-author +S-waiting-on-review

@rustbot rustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. and removed S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. labels Mar 1, 2021
@rustbot rustbot removed the T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. label Dec 16, 2021
@frank-king frank-king mentioned this pull request Jan 4, 2022
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@ssomers ssomers changed the title BTree: add drain and split_off_range methods BTree: add remove_range and split_off_range methods Jan 4, 2022
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ssomers commented Jan 4, 2022 •
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To stir up things, yanked the drain interface. I added remove_range instead just to have something that drops key-value pairs. Which only now makes me realize the drop_panic_leak test case for split_off_range is stupid: nothing is dropped before the split is finished.

PS also formatted code with stable instead of nightly and did not test tidy like a good boy should

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@ssomers ssomers changed the title BTree: add remove_range and split_off_range methods BTree: add split_off_range methods Jan 7, 2022
@JohnCSimon JohnCSimon added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Feb 6, 2022
@ssomers ssomers mentioned this pull request Feb 10, 2022
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@ssomers ssomers changed the title BTree: add split_off_range methods BTree: add drain methods Feb 14, 2022
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bors commented Feb 25, 2022

☔ The latest upstream changes (presumably #94350) made this pull request unmergeable. Please resolve the merge conflicts.

@JohnCSimon JohnCSimon added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Mar 20, 2022
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Dylan-DPC commented Mar 26, 2022

r? @yaahc

@rust-highfive rust-highfive assigned yaahc and unassigned m-ou-se Mar 26, 2022
@JohnCSimon JohnCSimon added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Apr 24, 2022
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yaahc commented Apr 29, 2022

r? rust-lang/libs-api

@rust-highfive rust-highfive assigned joshtriplett and unassigned yaahc Apr 29, 2022
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joshtriplett commented May 1, 2022

r? rust-lang/libs-api

@rust-highfive rust-highfive assigned dtolnay and unassigned joshtriplett May 1, 2022
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bors commented Jun 16, 2022

☔ The latest upstream changes (presumably #98103) made this pull request unmergeable. Please resolve the merge conflicts.

@ssomers ssomers closed this Jun 18, 2022
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