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[ Widget Preview ] Handle collections and records in custom preview annotations - #184518
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This pull request adds support for generating code for Dart collections (List, Map, Set) and Records within the widget preview generator. It also updates the DartFormatter to use language version 3.7.0 and includes new test cases. Review feedback highlights a missing toRecordValue extension method and an incorrect destructuring pattern, a potentially unstable hardcoded language version in the formatter, and an invalid fs.dispose() call in the tests.
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jyameo
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Apr 2, 2026
| for (final item in toSetValue()!) item.toExpression(), | ||
| ]), | ||
| RecordType() => () { | ||
| final (:Map<String, DartObject> named, :List<DartObject> positional) = toRecordValue()!; |
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Maybe use null-safe access or a check in case toRecordValue returns null?
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If type is RecordType, toRecordValue() should always be non-null.
…nnotations The code generator wasn't configured to handle collections and records as preview arguments as these types weren't originally accepted by the `Preview(...)` constructor. This caused these types to be treated as regular instances, resulting in the previewer crashing. This change adds support for collections and records as preview annotation arguments. Fixes flutter#181754
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… preview annotations (flutter/flutter#184518)
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flutter/flutter@0f401ee...7245c3f 2026-04-03 engine-flutter-autoroll@skia.org Roll Skia from c07c67045b6d to 5d847ba5c4aa (1 revision) (flutter/flutter#184570) 2026-04-03 engine-flutter-autoroll@skia.org Roll Dart SDK from 3c7a79045b8b to 46f49142acd9 (1 revision) (flutter/flutter#184567) 2026-04-03 engine-flutter-autoroll@skia.org Roll ICU from ee5f27adc28b to ff7995a708a1 (5 revisions) (flutter/flutter#184566) 2026-04-03 engine-flutter-autoroll@skia.org Roll Skia from 9ae8231be181 to c07c67045b6d (4 revisions) (flutter/flutter#184562) 2026-04-03 engine-flutter-autoroll@skia.org Roll Fuchsia Linux SDK from BFLjk6Uwd0gs_Hkdk... to PpL3Bn2YMb2h9LbdK... (flutter/flutter#184556) 2026-04-03 engine-flutter-autoroll@skia.org Roll Skia from 0566b2f5f0d1 to 9ae8231be181 (1 revision) (flutter/flutter#184547) 2026-04-03 engine-flutter-autoroll@skia.org Roll Dart SDK from 6008eaddd589 to 3c7a79045b8b (3 revisions) (flutter/flutter#184551) 2026-04-03 evanwall@buffalo.edu Fix wide gamut macos integration test (flutter/flutter#184427) 2026-04-02 jakemac@google.com forward an application name to DDS (flutter/flutter#184459) 2026-04-02 engine-flutter-autoroll@skia.org Roll Skia from 973117cfa875 to 0566b2f5f0d1 (8 revisions) (flutter/flutter#184534) 2026-04-02 97480502+b-luk@users.noreply.github.com Support different joins for stroked rects in uber_sdf, fix incorrect aa (flutter/flutter#184395) 2026-04-02 bkonyi@google.com [ Widget Preview ] Handle collections and records in custom preview annotations (flutter/flutter#184518) 2026-04-02 47866232+chunhtai@users.noreply.github.com Moves android_semantics_integration_test out of staging (flutter/flutter#184079) 2026-04-02 engine-flutter-autoroll@skia.org Roll Packages from b3fcf14 to 66bf7ec (4 revisions) (flutter/flutter#184514) 2026-04-02 rmolivares@renzo-olivares.dev Fix line breaks being lost when copying after selection gesture in SelectableRegion (flutter/flutter#184421) 2026-04-02 15619084+vashworth@users.noreply.github.com Add plugin version to SwiftPM package symlink directory (flutter/flutter#183668) 2026-04-02 34871572+gmackall@users.noreply.github.com Add our own wrapper for `CommonExtension` due to change in signature from 8.x->9.0 (flutter/flutter#184433) 2026-04-02 dbebawy@users.noreply.github.com [Android] Use EdgeToEdge.enable/WindowCompat for edge-to-edge mode instead of deprecated View flags (flutter/flutter#183072) 2026-04-02 dacoharkes@google.com [data_assets] Cleanup tests (flutter/flutter#184209) 2026-04-02 okorohelijah@google.com Enable SPM by default on Stable (flutter/flutter#184495) 2026-04-02 engine-flutter-autoroll@skia.org Roll Dart SDK from d84bdfeb45eb to 6008eaddd589 (2 revisions) (flutter/flutter#184513) 2026-04-02 victorsanniay@gmail.com Reland "Even more awaits" (flutter/flutter#184467) 2026-04-02 engine-flutter-autoroll@skia.org Roll Skia from bb9fd8653739 to 973117cfa875 (2 revisions) (flutter/flutter#184498) 2026-04-02 bkonyi@google.com [ Widget Preview ] Use analysis server for widget preview detection (flutter/flutter#184473) 2026-04-02 srawlins@google.com [web_ui] Fix avoid_type_to_string lint violation (flutter/flutter#184342) If this roll has caused a breakage, revert this CL and stop the roller using the controls here: https://autoroll.skia.org/r/flutter-packages Please CC louisehsu@google.com,stuartmorgan@google.com on the revert to ensure that a human is aware of the problem. To file a bug in Packages: https://github.com/flutter/flutter/issues/new/choose To report a problem with the AutoRoller itself, please file a bug: https://issues.skia.org/issues/new?component=1389291&template=1850622 Documentation for the AutoRoller is here: https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md
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…nnotations (flutter#184518) The code generator wasn't configured to handle collections and records as preview arguments as these types weren't originally accepted by the `Preview(...)` constructor. This caused these types to be treated as regular instances, resulting in the previewer crashing. This change adds support for collections and records as preview annotation arguments. Fixes flutter#181754
creatorpiyush
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Jun 10, 2026
…r#11427) flutter/flutter@0f401ee...7245c3f 2026-04-03 engine-flutter-autoroll@skia.org Roll Skia from c07c67045b6d to 5d847ba5c4aa (1 revision) (flutter/flutter#184570) 2026-04-03 engine-flutter-autoroll@skia.org Roll Dart SDK from 3c7a79045b8b to 46f49142acd9 (1 revision) (flutter/flutter#184567) 2026-04-03 engine-flutter-autoroll@skia.org Roll ICU from ee5f27adc28b to ff7995a708a1 (5 revisions) (flutter/flutter#184566) 2026-04-03 engine-flutter-autoroll@skia.org Roll Skia from 9ae8231be181 to c07c67045b6d (4 revisions) (flutter/flutter#184562) 2026-04-03 engine-flutter-autoroll@skia.org Roll Fuchsia Linux SDK from BFLjk6Uwd0gs_Hkdk... to PpL3Bn2YMb2h9LbdK... (flutter/flutter#184556) 2026-04-03 engine-flutter-autoroll@skia.org Roll Skia from 0566b2f5f0d1 to 9ae8231be181 (1 revision) (flutter/flutter#184547) 2026-04-03 engine-flutter-autoroll@skia.org Roll Dart SDK from 6008eaddd589 to 3c7a79045b8b (3 revisions) (flutter/flutter#184551) 2026-04-03 evanwall@buffalo.edu Fix wide gamut macos integration test (flutter/flutter#184427) 2026-04-02 jakemac@google.com forward an application name to DDS (flutter/flutter#184459) 2026-04-02 engine-flutter-autoroll@skia.org Roll Skia from 973117cfa875 to 0566b2f5f0d1 (8 revisions) (flutter/flutter#184534) 2026-04-02 97480502+b-luk@users.noreply.github.com Support different joins for stroked rects in uber_sdf, fix incorrect aa (flutter/flutter#184395) 2026-04-02 bkonyi@google.com [ Widget Preview ] Handle collections and records in custom preview annotations (flutter/flutter#184518) 2026-04-02 47866232+chunhtai@users.noreply.github.com Moves android_semantics_integration_test out of staging (flutter/flutter#184079) 2026-04-02 engine-flutter-autoroll@skia.org Roll Packages from b3fcf14 to 66bf7ec (4 revisions) (flutter/flutter#184514) 2026-04-02 rmolivares@renzo-olivares.dev Fix line breaks being lost when copying after selection gesture in SelectableRegion (flutter/flutter#184421) 2026-04-02 15619084+vashworth@users.noreply.github.com Add plugin version to SwiftPM package symlink directory (flutter/flutter#183668) 2026-04-02 34871572+gmackall@users.noreply.github.com Add our own wrapper for `CommonExtension` due to change in signature from 8.x->9.0 (flutter/flutter#184433) 2026-04-02 dbebawy@users.noreply.github.com [Android] Use EdgeToEdge.enable/WindowCompat for edge-to-edge mode instead of deprecated View flags (flutter/flutter#183072) 2026-04-02 dacoharkes@google.com [data_assets] Cleanup tests (flutter/flutter#184209) 2026-04-02 okorohelijah@google.com Enable SPM by default on Stable (flutter/flutter#184495) 2026-04-02 engine-flutter-autoroll@skia.org Roll Dart SDK from d84bdfeb45eb to 6008eaddd589 (2 revisions) (flutter/flutter#184513) 2026-04-02 victorsanniay@gmail.com Reland "Even more awaits" (flutter/flutter#184467) 2026-04-02 engine-flutter-autoroll@skia.org Roll Skia from bb9fd8653739 to 973117cfa875 (2 revisions) (flutter/flutter#184498) 2026-04-02 bkonyi@google.com [ Widget Preview ] Use analysis server for widget preview detection (flutter/flutter#184473) 2026-04-02 srawlins@google.com [web_ui] Fix avoid_type_to_string lint violation (flutter/flutter#184342) If this roll has caused a breakage, revert this CL and stop the roller using the controls here: https://autoroll.skia.org/r/flutter-packages Please CC louisehsu@google.com,stuartmorgan@google.com on the revert to ensure that a human is aware of the problem. To file a bug in Packages: https://github.com/flutter/flutter/issues/new/choose To report a problem with the AutoRoller itself, please file a bug: https://issues.skia.org/issues/new?component=1389291&template=1850622 Documentation for the AutoRoller is here: https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md
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The code generator wasn't configured to handle collections and records as preview arguments as these types weren't originally accepted by the
Preview(...)constructor. This caused these types to be treated as regular instances, resulting in the previewer crashing.This change adds support for collections and records as preview annotation arguments.
Fixes #181754