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📄 checkNullishAndReport.ts

📊 Analysis Summary

Metric	Count
🔧 Functions	1
📦 Imports	8

📚 Table of Contents

• Imports
• Functions

🛠️ File Location:

📂 packages/eslint-plugin/src/rules/prefer-optional-chain-utils/checkNullishAndReport.ts

📦 Imports

Name	Source
ParserServicesWithTypeInformation	@typescript-eslint/utils
TSESTree	@typescript-eslint/utils
ReportDescriptor	@typescript-eslint/utils/ts-eslint
RuleContext	@typescript-eslint/utils/ts-eslint
isTypeFlagSet	@typescript-eslint/type-utils
unionConstituents	ts-api-utils
PreferOptionalChainMessageIds	./PreferOptionalChainOptions
PreferOptionalChainOptions	./PreferOptionalChainOptions

---

Functions

`checkNullishAndReport(context: RuleContext<

PreferOptionalChainMessageIds,
[PreferOptionalChainOptions]

, parserServices: ParserServicesWithTypeInformation, { requireNullish }: PreferOptionalChainOptions, maybeNullishNodes: TSESTree.Expression[], descriptor: ReportDescriptor): void`

Code

export function checkNullishAndReport(
  context: RuleContext<
    PreferOptionalChainMessageIds,
    [PreferOptionalChainOptions]
  >,
  parserServices: ParserServicesWithTypeInformation,
  { requireNullish }: PreferOptionalChainOptions,
  maybeNullishNodes: TSESTree.Expression[],
  descriptor: ReportDescriptor<PreferOptionalChainMessageIds>,
): void {
  if (
    !requireNullish ||
    maybeNullishNodes.some(node =>
      unionConstituents(parserServices.getTypeAtLocation(node)).some(t =>
        isTypeFlagSet(t, ts.TypeFlags.Null | ts.TypeFlags.Undefined),
      ),
    )
  ) {
    context.report(descriptor);
  }
}

• Parameters:
• `context: RuleContext< PreferOptionalChainMessageIds, [PreferOptionalChainOptions]

  `

• parserServices: ParserServicesWithTypeInformation
• { requireNullish }: PreferOptionalChainOptions
• maybeNullishNodes: TSESTree.Expression[]
• descriptor: ReportDescriptor<PreferOptionalChainMessageIds>
• Return Type: void
• Calls:
• maybeNullishNodes.some
• unionConstituents(parserServices.getTypeAtLocation(node)).some
• isTypeFlagSet (from @typescript-eslint/type-utils)
• context.report

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