Emit declarations using alternative containing modules for types exported using separate export statements by Andarist · Pull Request #56857 · microsoft/TypeScript

Mateusz Burzyński (Andarist) · 2023-12-23T12:16:15Z

…rted using separate export statements

Mateusz Burzyński (Andarist) · 2023-12-23T12:18:12Z

+ return undefined;
+ }
+ const containers = mapDefined(candidates, candidate => getAliasForSymbolInContainer(candidate, symbol) ? candidate : undefined);
+ return containers.length === 1 ? getWithAlternativeContainers(containers[0]) : containers;


this line is ad-hoc, perhaps I should just flatMap this. From what I've seen the consumers of this return value assume some ordering - or well, operate on first items with priority or smth. So I'm not sure how it would behave in more complex scenarios with smth like: [...withAlternativeContainersA, ...withAlternativeContainersB, ...withAlternativeContainersC]

Wait I’m confused; why would there only being a single element in the array affect whether you need to repackage it or not?

I tried to explain this in the comment above. This is the only case I know how to reason about and about which i’m somewhat confident here. This is not the final solution - i’m seeking guidance what should be done here when there are more items in this array

From what I've seen the consumers of this return value assume some ordering - or well, operate on first items with priority or smth
Indeed, the results returned here are intended to be in priority order for "what is best to serialize", which is, admittedly, a bit subjective. IMO, the ordering here would probably be the direct symbols for each available container symbol, followed by all their alternative symbols, in order - so not quite a flat map.

I implemented the suggested solution. Could you take another look?

Wesley Wigham (weswigham) · 2024-01-02T21:30:37Z

+ return undefined;
+ }
+ const containers = mapDefined(candidates, candidate => getAliasForSymbolInContainer(candidate, symbol) ? candidate : undefined);
+ return containers.length === 1 ? getWithAlternativeContainers(containers[0]) : containers;


From what I've seen the consumers of this return value assume some ordering - or well, operate on first items with priority or smth
Indeed, the results returned here are intended to be in priority order for "what is best to serialize", which is, admittedly, a bit subjective. IMO, the ordering here would probably be the direct symbols for each available container symbol, followed by all their alternative symbols, in order - so not quite a flat map.

Wesley Wigham (weswigham) · 2024-01-09T18:34:26Z

TypeScript Bot (@typescript-bot) test this
TypeScript Bot (@typescript-bot) run dt
TypeScript Bot (@typescript-bot) test top100
TypeScript Bot (@typescript-bot) perf test public

TypeScript Bot (typescript-bot) · 2024-01-09T18:34:29Z

Heya Wesley Wigham (@weswigham), I've started to run the diff-based top-repos suite on this PR at 23553bb. You can monitor the build here.

Update: The results are in!

TypeScript Bot (typescript-bot) · 2024-01-09T18:34:29Z

Heya Wesley Wigham (@weswigham), I've started to run the parallelized Definitely Typed test suite on this PR at 23553bb. You can monitor the build here.

Update: The results are in!

TypeScript Bot (typescript-bot) · 2024-01-09T18:34:29Z

Heya Wesley Wigham (@weswigham), I've started to run the public perf test suite on this PR at 23553bb. You can monitor the build here.

Update: The results are in!

TypeScript Bot (typescript-bot) · 2024-01-09T19:19:53Z

Hey Wesley Wigham (@weswigham), the results of running the DT tests are ready.
Everything looks the same!
You can check the log here.

TypeScript Bot (typescript-bot) · 2024-01-09T19:27:31Z

Wesley Wigham (@weswigham)
The results of the perf run you requested are in!

Here they are:

tsc

Comparison Report - baseline..pr

_Metric	_baseline	_pr	_Delta	_Best	_Worst	_p-value
_{self-build-src - node (v20.5.1, x64)}
_{Memory used}	_{2,739,265k (± 5.68%)}	_{2,656,870k (± 5.35%)}	_~	_2,574,037k	_2,921,340k	_{p=0.230 n=6}
_{Parse Time}	_{5.01s (± 0.85%)}	_{5.01s (± 0.43%)}	_~	_4.99s	_5.04s	_{p=0.748 n=6}
_{Bind Time}	_{1.97s (± 1.09%)}	_{1.99s (± 1.04%)}	_~	_1.96s	_2.02s	_{p=0.517 n=6}
_{Check Time}	_{32.02s (± 0.31%)}	_{32.02s (± 0.55%)}	_~	_31.72s	_32.26s	_{p=0.936 n=6}
_{Emit Time}	_{2.80s (± 2.69%)}	_{2.82s (± 3.69%)}	_~	_2.68s	_2.99s	_{p=0.936 n=6}
_{Total Time}	_{41.83s (± 0.21%)}	_{41.86s (± 0.16%)}	_~	_41.76s	_41.94s	_{p=0.471 n=6}
_{self-compiler - node (v20.5.1, x64)}
_{Memory used}	_{418,813k (± 0.02%)}	_{418,829k (± 0.02%)}	_~	_418,755k	_418,981k	_{p=0.377 n=6}
_{Parse Time}	_{2.89s (± 0.75%)}	_{2.90s (± 0.68%)}	_~	_2.87s	_2.92s	_{p=0.871 n=6}
_{Bind Time}	_{1.13s (± 0.48%)}	_{1.13s (± 0.48%)}	_~	_1.13s	_1.14s	_{p=1.000 n=6}
_{Check Time}	_{14.09s (± 0.22%)}	_{14.04s (± 0.40%)}	_~	_13.96s	_14.11s	_{p=0.077 n=6}
_{Emit Time}	_{1.04s (± 0.78%)}	_{1.04s (± 0.52%)}	_~	_1.04s	_1.05s	_{p=0.441 n=6}
_{Total Time}	_{19.17s (± 0.26%)}	_{19.12s (± 0.24%)}	_~	_19.04s	_19.16s	_{p=0.171 n=6}
_{vscode - node (v20.5.1, x64)}
_{Memory used}	_{2,827,995k (± 0.00%)}	_{2,828,008k (± 0.00%)}	_~	_2,827,977k	_2,828,096k	_{p=0.689 n=6}
_{Parse Time}	_{10.73s (± 0.41%)}	_{10.73s (± 0.17%)}	_~	_10.71s	_10.76s	_{p=0.936 n=6}
_{Bind Time}	_{3.42s (± 0.47%)}	_{3.43s (± 0.40%)}	_~	_3.41s	_3.44s	_{p=0.514 n=6}
_{Check Time}	_{56.17s (± 0.15%)}	_{56.16s (± 0.24%)}	_~	_55.97s	_56.36s	_{p=0.872 n=6}
_{Emit Time}	_{16.20s (± 0.96%)}	_{16.27s (± 0.46%)}	_~	_16.17s	_16.36s	_{p=0.261 n=6}
_{Total Time}	_{86.53s (± 0.19%)}	_{86.59s (± 0.18%)}	_~	_86.34s	_86.77s	_{p=0.470 n=6}

System info unknown

Hosts

node (v20.5.1, x64)

Scenarios

self-build-src - node (v20.5.1, x64)
self-compiler - node (v20.5.1, x64)
vscode - node (v20.5.1, x64)

_Benchmark	_Name	_Iterations
_Current	_pr	₆
_Baseline	_baseline	₆

Developer Information:

Download Benchmarks

TypeScript Bot (typescript-bot) · 2024-01-09T19:31:31Z

Wesley Wigham (@weswigham) Here are the results of running the top-repos suite comparing main and refs/pull/56857/merge:

Something interesting changed - please have a look.

Details

chakra-ui/chakra-ui

4 of 28 projects failed to build with the old tsc and were ignored

packages/components/tsconfig.build.json

error TS5056: Cannot write file '/mnt/ts_downloads/chakra-ui/packages/components/dist/types/menu/menu.stories.d.ts' because it would be overwritten by multiple input files.
- Project Scope

Ashley Claymore (acutmore) · 2024-02-14T22:16:04Z

Just a note to say that this change seems to have regressed our (Bloomberg's) workaround for #38111.

I'll put a playground together and raise a concrete issue tomorrow 🙂

Emit declarations using alternative containing modules for types expo…
5ef3a8e
…rted using separate export statements

TypeScript Bot (typescript-bot) added the For Uncommitted Bug PR for untriaged, rejected, closed or missing bug label Dec 23, 2023

Mateusz Burzyński (Andarist) commented Dec 23, 2023
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Mateusz Burzyński (Andarist) mentioned this pull request Dec 23, 2023
[vue-query]: Fresh Vue3 project + Tanstack - Typescript errors, This is likely not a portable. TanStack/query#6318
Closed

Wesley Wigham (weswigham) requested changes Jan 2, 2024
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Nathan Shively-Sanders (sandersn) assigned Wesley Wigham (weswigham)Jan 4, 2024

TypeScript Bot (typescript-bot) added For Milestone Bug PRs that fix a bug with a specific milestone and removed For Uncommitted Bug PR for untriaged, rejected, closed or missing bug labels Jan 4, 2024

Nathan Shively-Sanders (sandersn) requested a review from Sheetal Nandi (sheetalkamat)January 4, 2024 22:13

getWithAlternativeContainers for all containers
23553bb

Mateusz Burzyński (Andarist)force-pushed the fix/dts-emit-through-separate-export-statements branch from 4b7ce35 to 23553bbCompare January 6, 2024 08:58

Wesley Wigham (weswigham) approved these changes Jan 9, 2024
View reviewed changes

Wesley Wigham (weswigham) merged commit 4557e34 into microsoft:mainJan 9, 2024

This was referenced Feb 15, 2024
[TS 5.4.0-beta] .d.ts emit adding an inline type import instead of utilising existing import #57415
Open
Bloomberg feedback for 5.4 Beta #57464
Closed

Microsoft (microsoft) locked as resolved and limited conversation to collaborators Oct 16, 2025

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Mateusz Burzyński (Andarist) commented Dec 23, 2023

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Wesley Wigham (weswigham) commented Jan 9, 2024

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tsc

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