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Port #60195: Allow reusing type nodes that resolve to error types #13

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Port #60195: Allow reusing type nodes that resolve to error types #13

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Initial plan for issue
Copilot Jun 6, 2025
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Port TypeScript PR #60195: Allow reusing type nodes that resolve to e…
Copilot Jun 6, 2025
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6 changes: 6 additions & 0 deletions internal/checker/nodebuilderimpl.go
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Original file line number Diff line number Diff line change
Expand Up @@ -304,6 +304,12 @@ func (b *nodeBuilderImpl) tryReuseExistingNonParameterTypeNode(existing *ast.Typ
if annotationType == nil {
annotationType = b.getTypeFromTypeNode(existing, true)
}
if annotationType != nil && b.ch.isErrorType(annotationType) {
// allow "reusing" type nodes that resolve to error types
// those can't truly be reused but it prevents cascading errors in isolatedDeclarations
// for source with errors there is no guarantee to emit correct code anyway
return b.tryReuseExistingTypeNodeHelper(existing)
}
if annotationType != nil && b.typeNodeIsEquivalentToType(host, t, annotationType) && b.existingTypeNodeIsNotReferenceOrIsReferenceWithCompatibleTypeArgumentCount(existing, t) {
result := b.tryReuseExistingTypeNodeHelper(existing)
if result != nil {
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