From 1575ae0e3fbd9a329f90690eacb54128a6fafe8f Mon Sep 17 00:00:00 2001
From: Eli White <eliwhite@meta.com>
Date: Mon, 26 Jan 2026 14:04:07 -0800
Subject: [PATCH] Rename TypeInformationComparisonError fields to match
 TypeAnnotationComparisonError (#55302)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/55302

Rename newerType/olderType to newerAnnotation/olderAnnotation in TypeInformationComparisonError to be consistent with TypeAnnotationComparisonError. This allows code that handles both error types to access annotation fields uniformly without checking error type first.

Changelog: [Internal]

Reviewed By: makovkastar

Differential Revision: D91275947

fbshipit-source-id: 03a7a4aa521afea5bc8f21d6ab49309ad449b977
---
 .../src/ComparisonResult.js                         | 12 ++++++------
 .../src/ErrorFormatting.js                          | 13 +------------
 2 files changed, 7 insertions(+), 18 deletions(-)

diff --git a/packages/react-native-compatibility-check/src/ComparisonResult.js b/packages/react-native-compatibility-check/src/ComparisonResult.js
index a6a296dcb15..b131979a0b9 100644
--- a/packages/react-native-compatibility-check/src/ComparisonResult.js
+++ b/packages/react-native-compatibility-check/src/ComparisonResult.js
@@ -24,8 +24,8 @@ type TypeAnnotationComparisonError = {
 type TypeInformationComparisonError = {
   type: 'TypeInformationComparisonError',
   message: string,
-  newerType: CompleteTypeAnnotation,
-  olderType: CompleteTypeAnnotation,
+  newerAnnotation: CompleteTypeAnnotation,
+  olderAnnotation: CompleteTypeAnnotation,
   previousError?: TypeComparisonError,
 };
 type PropertyComparisonError = {
@@ -179,15 +179,15 @@ export function makeError(error: TypeComparisonError): ComparisonResult {
 
 export function typeInformationComparisonError(
   message: string,
-  newerType: CompleteTypeAnnotation,
-  olderType: CompleteTypeAnnotation,
+  newerAnnotation: CompleteTypeAnnotation,
+  olderAnnotation: CompleteTypeAnnotation,
   previousError?: TypeComparisonError,
 ): TypeComparisonError {
   return {
     type: 'TypeInformationComparisonError',
     message,
-    newerType,
-    olderType,
+    newerAnnotation,
+    olderAnnotation,
     previousError,
   };
 }
diff --git a/packages/react-native-compatibility-check/src/ErrorFormatting.js b/packages/react-native-compatibility-check/src/ErrorFormatting.js
index 6e0b6f2870e..39df6aad8fc 100644
--- a/packages/react-native-compatibility-check/src/ErrorFormatting.js
+++ b/packages/react-native-compatibility-check/src/ErrorFormatting.js
@@ -54,6 +54,7 @@ export function formatErrorMessage(
       );
       return error.message + formattedPositionalChanges.join('');
     case 'TypeAnnotationComparisonError':
+    case 'TypeInformationComparisonError':
       const previousError = error.previousError;
 
       return (
@@ -70,18 +71,6 @@ export function formatErrorMessage(
             formatErrorMessage(previousError, indent + 2)
           : '')
       );
-    case 'TypeInformationComparisonError':
-      // I'm not sure that this error type is possible with the codegen
-
-      return (
-        error.message +
-        indentedLineStart(indent + 1) +
-        '-- new: ' +
-        formatTypeAnnotation(error.newerType) +
-        indentedLineStart(indent + 1) +
-        '-- old: ' +
-        formatTypeAnnotation(error.olderType)
-      );
     case 'MemberComparisonError':
       const formattedMembers = error.mismatchedMembers.map(
         individualMemberError =>