Fixed contravariant inferences from annotated optional parameters #55397
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typescript-bot
added
the
For Milestone Bug
weswigham
requested changes
Aug 16, 2023
| @@ -35120,7 +35120,9 @@ export function createTypeChecker(host: TypeCheckerHost): TypeChecker { | |||
| if (declaration.type) { | |||
| const typeNode = getEffectiveTypeAnnotationNode(declaration); | |||
| if (typeNode) { | |||
| inferTypes(inferenceContext.inferences, getTypeFromTypeNode(typeNode), getTypeAtPosition(context, i)); | |||
| const source = addOptionality(getTypeFromTypeNode(typeNode), /*isProperty*/ false, hasQuestionToken(declaration)); | |||
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hasQuestionToken(declaration) isn't going to do the right thing for jsdoc optional parameters - instead, use the catch-all isOptionalDeclaration.
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👍 pushed out the appropriate change (and a test case)
weswigham
approved these changes
Aug 16, 2023
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fixes #55394