Fix unsafe type assertions on object literals

[mjbvz]

<T>{ ... } style type assertions are unsafe as they can hide some common typing errors such as missing properties on the object. This has caused errors for me multiple times now, so I think it would be good to make a pass through the code

Fixing

I've added a new eslint rule for this called local/code-no-dangerous-type-assertions. You can turn it on in .eslintrc.json

In most cases, we should prefer using proper typings such as:

const x = <T>{...};

// Becomes --->

const x: T = {...};

arr.map(x => <T>{ ... })

// Becomes --->

arr.map((x): T => ({ ... }));

If you want to make sure an object fulfills a certain type, prefer using the satisfies operator instead which will enforce the type without actually changing its shape:

const x = <T>{...};

// Becomes --->

const x = {...} satisfies T;

Note that this rule still allows <any> casts for now. You can also suppress this rule in the few cases where you need to workaround it using an eslint comment

---

Tracking

• src/vs/base/common/event.ts

  • 1271:21

• src/vs/base/common/objects.ts

  • 261:17

• src/vs/base/common/uri.ts @jrieken

  • 476

• src/vs/base/common/worker/simpleWorker.ts

  • 411:17

• src/vs/base/parts/ipc/common/ipc.ts

  • 429:36
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  • 487:37
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• src/vs/base/parts/ipc/node/ipc.cp.ts

  • 105:10

• src/vs/editor/browser/services/webWorker.ts

  • 110:27

• src/vs/editor/browser/widget/diffEditor/utils.ts

  • 192:17

• src/vs/editor/contrib/hover/browser/markerHoverParticipant.ts needs help from @bpasero

  • 159:43

• src/vs/editor/standalone/browser/quickInput/standaloneQuickInputService.ts @TylerLeonhardt

  • 116:135

• src/vs/nls.ts @TylerLeonhardt

  • 250:15

• src/vs/platform/environment/node/argv.ts

  • 270:13

• src/vs/platform/issue/electron-main/issueMainService.ts @justschen

  • 413:36

• src/vs/platform/list/browser/listService.ts

  • 1157:12

• src/vs/platform/product/common/product.ts

  • 56:12

• src/vs/platform/quickinput/browser/quickInputController.ts @TylerLeonhardt

  • 337:135

• src/vs/platform/quickinput/browser/quickInputService.ts @TylerLeonhardt

  • 151:135

• src/vs/platform/quickinput/browser/quickPickPin.ts @TylerLeonhardt

  • 60:53

• src/vs/platform/request/node/requestService.ts @chrmarti

  • 168:13

• src/vs/platform/terminal/common/capabilities/commandDetectionCapability.ts

  • 50:11
  • 442:33
  • 525:44
  • 784:44

• src/vs/platform/update/common/update.ts @joaomoreno

  • 76:17
  • 77:44
  • 78:53
  • 81:15

• src/vs/platform/utilityProcess/electron-main/utilityProcess.ts

  • 244:56

• src/vs/workbench/api/browser/mainThreadLanguageFeatures.ts @jrieken

  • 435:157
  • 445:167
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• src/vs/workbench/api/browser/mainThreadNotebook.ts @rebornix

  • 107:62

• src/vs/workbench/api/browser/mainThreadTask.ts

  • 492:13

• src/vs/workbench/api/common/extHost.api.impl.ts @jrieken

  • 1471:25

• src/vs/workbench/api/common/extHostDebugService.ts @connor4312

  • 416:39
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• src/vs/workbench/api/common/extHostTypeConverters.ts @jrieken

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• src/vs/workbench/browser/actions/quickAccessActions.ts @TylerLeonhardt

  • 168:21

• src/vs/workbench/browser/parts/editor/breadcrumbsControl.ts @jrieken

  • 88:47

• src/vs/workbench/contrib/accessibility/browser/accessibleView.ts

  • 531:45

• src/vs/workbench/contrib/bulkEdit/browser/preview/bulkEditPane.ts @jrieken

  • 123:30

• src/vs/workbench/contrib/chat/browser/actions/chatActions.ts @roblourens

  • 119:73

• src/vs/workbench/contrib/chat/browser/actions/chatImportExport.ts @roblourens

  • 99:92

• src/vs/workbench/contrib/chat/browser/actions/chatMoveActions.ts @roblourens

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• src/vs/workbench/contrib/chat/browser/contrib/chatDynamicVariables.ts

  • 102:133
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• src/vs/workbench/contrib/chat/common/chatModel.ts @roblourens

  • 657:7

• src/vs/workbench/contrib/editSessions/browser/editSessionsViews.ts @alexr00

  • 47:53

• src/vs/workbench/contrib/files/browser/explorerService.ts @lramos15

  • 187:111

• src/vs/workbench/contrib/interactive/browser/interactive.contribution.ts @rebornix

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• src/vs/workbench/contrib/preferences/browser/keybindingsEditor.ts @ulugbekna

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• src/vs/workbench/contrib/preferences/browser/settingsTree.ts @rzhao271

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• src/vs/workbench/contrib/webview/browser/themeing.ts @mjbvz

  • 66:7

• src/vs/workbench/electron-sandbox/actions/windowActions.ts

  • 260:16

• src/vs/workbench/services/extensions/common/extensionsRegistry.ts @alexdima

  • 219:16

• src/vs/workbench/services/preferences/browser/keybindingsEditorModel.ts @ulugbekna

  • 88:80
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• src/vs/workbench/services/preferences/common/preferencesModels.ts @rzhao271

  • 428:48
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• src/vs/workbench/test/browser/workbenchTestServices.ts @mjbvz

  • 214:31

[alexr00]

I think I got all mine ✅

[connor4312]

I got rid of mine, but I had to add a new cast via a mapValues function in common/objects.ts -- still better to keep the unsafeness hidden inside well-defined functions.