Revert "Handle indexed access types in getSymbolAtLocation and findAllReferences (#17787)" (#18111)

This reverts commit 30b3cb0.

Author: Andy

src/compiler/checker.ts

@@ -22931,7 +22931,7 @@ namespace ts {
             return undefined;
         }
 
-        function getSymbolAtLocation(node: Node): Symbol | undefined {
+        function getSymbolAtLocation(node: Node) {
             if (node.kind === SyntaxKind.SourceFile) {
                 return isExternalModule(<SourceFile>node) ? getMergedSymbol(node.symbol) : undefined;
             }
@@ -23009,21 +23009,9 @@ namespace ts {
 
                 case SyntaxKind.NumericLiteral:
                     // index access
-                    switch (node.parent.kind) {
-                        case SyntaxKind.ElementAccessExpression: {
-                            if ((<ElementAccessExpression>node.parent).argumentExpression !== node) {
-                                return undefined;
-                            }
-                            const objectType = getTypeOfExpression((<ElementAccessExpression>node.parent).expression);
-                            return getPropertyOfType(objectType, (<NumericLiteral>node).text as __String);
-                        }
-                        case SyntaxKind.LiteralType: {
-                            if (!isIndexedAccessTypeNode(node.parent.parent)) {
-                                return undefined;
-                            }
-                            const objectType = getTypeFromTypeNode(node.parent.parent.objectType);
-                            return getPropertyOfType(objectType, escapeLeadingUnderscores((node as StringLiteral | NumericLiteral).text));
-                        }
+                    if (node.parent.kind === SyntaxKind.ElementAccessExpression && (<ElementAccessExpression>node.parent).argumentExpression === node) {
+                        const objectType = getTypeOfExpression((<ElementAccessExpression>node.parent).expression);
+                        return getPropertyOfType(objectType, (<NumericLiteral>node).text as __String);
                     }
                     break;
             }

src/services/findAllReferences.ts

@@ -748,11 +748,11 @@ namespace ts.FindAllReferences.Core {
                 return (node as Identifier).text.length === searchSymbolName.length;
 
             case SyntaxKind.StringLiteral:
-                return (isLiteralNameOfPropertyDeclarationOrIndexAccess(node as StringLiteral) || isNameOfExternalModuleImportOrDeclaration(node)) &&
+                return (isLiteralNameOfPropertyDeclarationOrIndexAccess(node) || isNameOfExternalModuleImportOrDeclaration(node)) &&
                     (node as StringLiteral).text.length === searchSymbolName.length;
 
             case SyntaxKind.NumericLiteral:
-                return isLiteralNameOfPropertyDeclarationOrIndexAccess(node as NumericLiteral) && (node as NumericLiteral).text.length === searchSymbolName.length;
+                return isLiteralNameOfPropertyDeclarationOrIndexAccess(node) && (node as NumericLiteral).text.length === searchSymbolName.length;
 
             default:
                 return false;

src/services/rename.ts

@@ -89,15 +89,9 @@ namespace ts.Rename {
     }
 
     function nodeIsEligibleForRename(node: Node): boolean {
-        switch (node.kind) {
-            case SyntaxKind.Identifier:
-            case SyntaxKind.StringLiteral:
-            case SyntaxKind.ThisKeyword:
-                return true;
-            case SyntaxKind.NumericLiteral:
-                return isLiteralNameOfPropertyDeclarationOrIndexAccess(node as NumericLiteral);
-            default:
-                return false;
-        }
+        return node.kind === ts.SyntaxKind.Identifier ||
+            node.kind === SyntaxKind.StringLiteral ||
+            isLiteralNameOfPropertyDeclarationOrIndexAccess(node) ||
+            isThis(node);
     }
 }

src/services/utilities.ts

@@ -244,25 +244,27 @@ namespace ts {
             isFunctionLike(node.parent) && (<FunctionLikeDeclaration>node.parent).name === node;
     }
 
-    export function isLiteralNameOfPropertyDeclarationOrIndexAccess(node: StringLiteral | NumericLiteral): boolean {
-        switch (node.parent.kind) {
-            case SyntaxKind.PropertyDeclaration:
-            case SyntaxKind.PropertySignature:
-            case SyntaxKind.PropertyAssignment:
-            case SyntaxKind.EnumMember:
-            case SyntaxKind.MethodDeclaration:
-            case SyntaxKind.MethodSignature:
-            case SyntaxKind.GetAccessor:
-            case SyntaxKind.SetAccessor:
-            case SyntaxKind.ModuleDeclaration:
-                return getNameOfDeclaration(<Declaration>node.parent) === node;
-            case SyntaxKind.ElementAccessExpression:
-                return (<ElementAccessExpression>node.parent).argumentExpression === node;
-            case SyntaxKind.ComputedPropertyName:
-                return true;
-            case SyntaxKind.LiteralType:
-                return node.parent.parent.kind === SyntaxKind.IndexedAccessType;
+    export function isLiteralNameOfPropertyDeclarationOrIndexAccess(node: Node): boolean {
+        if (node.kind === SyntaxKind.StringLiteral || node.kind === SyntaxKind.NumericLiteral) {
+            switch (node.parent.kind) {
+                case SyntaxKind.PropertyDeclaration:
+                case SyntaxKind.PropertySignature:
+                case SyntaxKind.PropertyAssignment:
+                case SyntaxKind.EnumMember:
+                case SyntaxKind.MethodDeclaration:
+                case SyntaxKind.MethodSignature:
+                case SyntaxKind.GetAccessor:
+                case SyntaxKind.SetAccessor:
+                case SyntaxKind.ModuleDeclaration:
+                    return getNameOfDeclaration(<Declaration>node.parent) === node;
+                case SyntaxKind.ElementAccessExpression:
+                    return (<ElementAccessExpression>node.parent).argumentExpression === node;
+                case SyntaxKind.ComputedPropertyName:
+                    return true;
+            }
         }
+
+        return false;
     }
 
     export function isExpressionOfExternalModuleImportEqualsDeclaration(node: Node) {