typescript-eslint · JoshuaKGoldberg · Feb 15, 2023 · Dec 17, 2022 · Feb 5, 2023 · Feb 5, 2023
diff --git a/packages/ast-spec/src/base/MethodDefinitionBase.ts b/packages/ast-spec/src/base/MethodDefinitionBase.ts
@@ -1,7 +1,6 @@
 import type { FunctionExpression } from '../expression/FunctionExpression/spec';
 import type { TSEmptyBodyFunctionExpression } from '../expression/TSEmptyBodyFunctionExpression/spec';
 import type { Decorator } from '../special/Decorator/spec';
-import type { TSTypeParameterDeclaration } from '../special/TSTypeParameterDeclaration/spec';
 import type {
   ClassPropertyNameNonComputed,
   PropertyName,
@@ -21,7 +20,6 @@ interface MethodDefinitionBase extends BaseNode {
   optional?: boolean;
   decorators?: Decorator[];
   accessibility?: Accessibility;
-  typeParameters?: TSTypeParameterDeclaration;
   override?: boolean;
 }
 

diff --git a/packages/ast-spec/src/element/TSIndexSignature/spec.ts b/packages/ast-spec/src/element/TSIndexSignature/spec.ts
@@ -10,6 +10,5 @@ export interface TSIndexSignature extends BaseNode {
   typeAnnotation?: TSTypeAnnotation;
   readonly?: boolean;
   accessibility?: Accessibility;
-  export?: boolean;
   static?: boolean;
 }
diff --git a/packages/ast-spec/src/element/TSMethodSignature/spec.ts b/packages/ast-spec/src/element/TSMethodSignature/spec.ts
@@ -20,7 +20,6 @@ interface TSMethodSignatureBase extends BaseNode {
   readonly?: boolean;
   typeParameters?: TSTypeParameterDeclaration;
   accessibility?: Accessibility;
-  export?: boolean;
   static?: boolean;
   kind: 'get' | 'method' | 'set';
 }

diff --git a/packages/ast-spec/src/element/TSPropertySignature/spec.ts b/packages/ast-spec/src/element/TSPropertySignature/spec.ts
@@ -2,7 +2,6 @@ import type { AST_NODE_TYPES } from '../../ast-node-types';
 import type { Accessibility } from '../../base/Accessibility';
 import type { BaseNode } from '../../base/BaseNode';
 import type { TSTypeAnnotation } from '../../special/TSTypeAnnotation/spec';
-import type { Expression } from '../../unions/Expression';
 import type {
   PropertyName,
   PropertyNameComputed,
@@ -15,10 +14,8 @@ interface TSPropertySignatureBase extends BaseNode {
   optional?: boolean;
   computed: boolean;
   typeAnnotation?: TSTypeAnnotation;
-  initializer?: Expression;
   readonly?: boolean;
   static?: boolean;
-  export?: boolean;
   accessibility?: Accessibility;
 }
 

diff --git a/...s/fixtures/_error_/class-with-export-parameter-properties/snapshots/1-TSESTree-Error.shot b/...s/fixtures/_error_/class-with-export-parameter-properties/snapshots/1-TSESTree-Error.shot
@@ -1,3 +1,3 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`AST Fixtures legacy-fixtures basics _error_ class-with-export-parameter-properties TSESTree - Error 1`] = `"NO ERROR"`;
+exports[`AST Fixtures legacy-fixtures basics _error_ class-with-export-parameter-properties TSESTree - Error 1`] = `[TSError: A parameter cannot have an export modifier.]`;
diff --git a/.../fixtures/_error_/class-with-export-parameter-properties/snapshots/3-Alignment-Error.shot b/.../fixtures/_error_/class-with-export-parameter-properties/snapshots/3-Alignment-Error.shot
@@ -1,3 +1,3 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`AST Fixtures legacy-fixtures basics _error_ class-with-export-parameter-properties Error Alignment 1`] = `"Babel errored but TSESTree didn't"`;
+exports[`AST Fixtures legacy-fixtures basics _error_ class-with-export-parameter-properties Error Alignment 1`] = `"Both errored"`;
diff --git a/...ecovery/fixtures/_error_/interface-index-signature-export/snapshots/1-TSESTree-Error.shot b/...ecovery/fixtures/_error_/interface-index-signature-export/snapshots/1-TSESTree-Error.shot
@@ -1,3 +1,3 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`AST Fixtures legacy-fixtures errorRecovery _error_ interface-index-signature-export TSESTree - Error 1`] = `"NO ERROR"`;
+exports[`AST Fixtures legacy-fixtures errorRecovery _error_ interface-index-signature-export TSESTree - Error 1`] = `[TSError: An index signature cannot have an export modifier.]`;
diff --git a/...covery/fixtures/_error_/interface-index-signature-export/snapshots/3-Alignment-Error.shot b/...covery/fixtures/_error_/interface-index-signature-export/snapshots/3-Alignment-Error.shot
@@ -1,3 +1,3 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`AST Fixtures legacy-fixtures errorRecovery _error_ interface-index-signature-export Error Alignment 1`] = `"Babel errored but TSESTree didn't"`;
+exports[`AST Fixtures legacy-fixtures errorRecovery _error_ interface-index-signature-export Error Alignment 1`] = `"Both errored"`;
diff --git a/...es/errorRecovery/fixtures/_error_/interface-method-export/snapshots/1-TSESTree-Error.shot b/...es/errorRecovery/fixtures/_error_/interface-method-export/snapshots/1-TSESTree-Error.shot
@@ -1,3 +1,3 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`AST Fixtures legacy-fixtures errorRecovery _error_ interface-method-export TSESTree - Error 1`] = `"NO ERROR"`;
+exports[`AST Fixtures legacy-fixtures errorRecovery _error_ interface-method-export TSESTree - Error 1`] = `[TSError: A method signature cannot have an export modifier.]`;
diff --git a/...s/errorRecovery/fixtures/_error_/interface-method-export/snapshots/3-Alignment-Error.shot b/...s/errorRecovery/fixtures/_error_/interface-method-export/snapshots/3-Alignment-Error.shot
@@ -1,3 +1,3 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`AST Fixtures legacy-fixtures errorRecovery _error_ interface-method-export Error Alignment 1`] = `"Babel errored but TSESTree didn't"`;
+exports[`AST Fixtures legacy-fixtures errorRecovery _error_ interface-method-export Error Alignment 1`] = `"Both errored"`;
diff --git a/.../errorRecovery/fixtures/_error_/interface-property-export/snapshots/1-TSESTree-Error.shot b/.../errorRecovery/fixtures/_error_/interface-property-export/snapshots/1-TSESTree-Error.shot
@@ -1,3 +1,3 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`AST Fixtures legacy-fixtures errorRecovery _error_ interface-property-export TSESTree - Error 1`] = `"NO ERROR"`;
+exports[`AST Fixtures legacy-fixtures errorRecovery _error_ interface-property-export TSESTree - Error 1`] = `[TSError: A property signature cannot have an export modifier.]`;
diff --git a/...errorRecovery/fixtures/_error_/interface-property-export/snapshots/3-Alignment-Error.shot b/...errorRecovery/fixtures/_error_/interface-property-export/snapshots/3-Alignment-Error.shot
@@ -1,3 +1,3 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`AST Fixtures legacy-fixtures errorRecovery _error_ interface-property-export Error Alignment 1`] = `"Babel errored but TSESTree didn't"`;
+exports[`AST Fixtures legacy-fixtures errorRecovery _error_ interface-property-export Error Alignment 1`] = `"Both errored"`;
diff --git a/...ry/fixtures/_error_/interface-property-with-default-value/snapshots/1-TSESTree-Error.shot b/...ry/fixtures/_error_/interface-property-with-default-value/snapshots/1-TSESTree-Error.shot
@@ -1,3 +1,3 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`AST Fixtures legacy-fixtures errorRecovery _error_ interface-property-with-default-value TSESTree - Error 1`] = `"NO ERROR"`;
+exports[`AST Fixtures legacy-fixtures errorRecovery _error_ interface-property-with-default-value TSESTree - Error 1`] = `[TSError: A property signature cannot have an initializer.]`;
diff --git a/...y/fixtures/_error_/interface-property-with-default-value/snapshots/3-Alignment-Error.shot b/...y/fixtures/_error_/interface-property-with-default-value/snapshots/3-Alignment-Error.shot
@@ -1,3 +1,3 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`AST Fixtures legacy-fixtures errorRecovery _error_ interface-property-with-default-value Error Alignment 1`] = `"Babel errored but TSESTree didn't"`;
+exports[`AST Fixtures legacy-fixtures errorRecovery _error_ interface-property-with-default-value Error Alignment 1`] = `"Both errored"`;
diff --git a/...rorRecovery/fixtures/_error_/object-assertion-not-allowed/snapshots/1-TSESTree-Error.shot b/...rorRecovery/fixtures/_error_/object-assertion-not-allowed/snapshots/1-TSESTree-Error.shot
@@ -1,3 +1,3 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`AST Fixtures legacy-fixtures errorRecovery _error_ object-assertion-not-allowed TSESTree - Error 1`] = `"NO ERROR"`;
+exports[`AST Fixtures legacy-fixtures errorRecovery _error_ object-assertion-not-allowed TSESTree - Error 1`] = `[TSError: A shorthand property assignment cannot have an exclamation token.]`;
diff --git a/...orRecovery/fixtures/_error_/object-assertion-not-allowed/snapshots/3-Alignment-Error.shot b/...orRecovery/fixtures/_error_/object-assertion-not-allowed/snapshots/3-Alignment-Error.shot
@@ -1,3 +1,3 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`AST Fixtures legacy-fixtures errorRecovery _error_ object-assertion-not-allowed Error Alignment 1`] = `"Babel errored but TSESTree didn't"`;
+exports[`AST Fixtures legacy-fixtures errorRecovery _error_ object-assertion-not-allowed Error Alignment 1`] = `"Both errored"`;
diff --git a/...rrorRecovery/fixtures/_error_/object-optional-not-allowed/snapshots/1-TSESTree-Error.shot b/...rrorRecovery/fixtures/_error_/object-optional-not-allowed/snapshots/1-TSESTree-Error.shot
@@ -1,3 +1,3 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`AST Fixtures legacy-fixtures errorRecovery _error_ object-optional-not-allowed TSESTree - Error 1`] = `"NO ERROR"`;
+exports[`AST Fixtures legacy-fixtures errorRecovery _error_ object-optional-not-allowed TSESTree - Error 1`] = `[TSError: A shorthand property assignment cannot have a question token.]`;
diff --git a/...rorRecovery/fixtures/_error_/object-optional-not-allowed/snapshots/3-Alignment-Error.shot b/...rorRecovery/fixtures/_error_/object-optional-not-allowed/snapshots/3-Alignment-Error.shot
@@ -1,3 +1,3 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`AST Fixtures legacy-fixtures errorRecovery _error_ object-optional-not-allowed Error Alignment 1`] = `"Babel errored but TSESTree didn't"`;
+exports[`AST Fixtures legacy-fixtures errorRecovery _error_ object-optional-not-allowed Error Alignment 1`] = `"Both errored"`;
diff --git a/packages/ast-spec/src/parameter/TSParameterProperty/spec.ts b/packages/ast-spec/src/parameter/TSParameterProperty/spec.ts
@@ -11,7 +11,6 @@ export interface TSParameterProperty extends BaseNode {
   accessibility?: Accessibility;
   readonly?: boolean;
   static?: boolean;
-  export?: boolean;
   override?: boolean;
   parameter: AssignmentPattern | BindingName | RestElement;
   decorators?: Decorator[];

diff --git a/packages/ast-spec/tests/fixtures-with-differences-errors.shot b/packages/ast-spec/tests/fixtures-with-differences-errors.shot
@@ -28,7 +28,6 @@ Object {
     "legacy-fixtures/basics/fixtures/_error_/await-without-async-function/fixture.ts",
     "legacy-fixtures/basics/fixtures/_error_/class-private-identifier-field-with-accessibility-error/fixture.ts",
     "legacy-fixtures/basics/fixtures/_error_/class-with-constructor-and-type-parameters/fixture.ts",
-    "legacy-fixtures/basics/fixtures/_error_/class-with-export-parameter-properties/fixture.ts",
     "legacy-fixtures/basics/fixtures/_error_/class-with-implements-and-extends/fixture.ts",
     "legacy-fixtures/basics/fixtures/_error_/class-with-static-parameter-properties/fixture.ts",
     "legacy-fixtures/basics/fixtures/_error_/class-with-two-methods-computed-constructor/fixture.ts",
@@ -63,27 +62,21 @@ Object {
     "legacy-fixtures/errorRecovery/fixtures/_error_/index-signature-parameters/fixture.ts",
     "legacy-fixtures/errorRecovery/fixtures/_error_/interface-empty-extends/fixture.ts",
     "legacy-fixtures/errorRecovery/fixtures/_error_/interface-implements/fixture.ts",
-    "legacy-fixtures/errorRecovery/fixtures/_error_/interface-index-signature-export/fixture.ts",
     "legacy-fixtures/errorRecovery/fixtures/_error_/interface-index-signature-private/fixture.ts",
     "legacy-fixtures/errorRecovery/fixtures/_error_/interface-index-signature-protected/fixture.ts",
     "legacy-fixtures/errorRecovery/fixtures/_error_/interface-index-signature-public/fixture.ts",
     "legacy-fixtures/errorRecovery/fixtures/_error_/interface-index-signature-static/fixture.ts",
-    "legacy-fixtures/errorRecovery/fixtures/_error_/interface-method-export/fixture.ts",
     "legacy-fixtures/errorRecovery/fixtures/_error_/interface-method-private/fixture.ts",
     "legacy-fixtures/errorRecovery/fixtures/_error_/interface-method-protected/fixture.ts",
     "legacy-fixtures/errorRecovery/fixtures/_error_/interface-method-public/fixture.ts",
     "legacy-fixtures/errorRecovery/fixtures/_error_/interface-method-readonly/fixture.ts",
     "legacy-fixtures/errorRecovery/fixtures/_error_/interface-method-static/fixture.ts",
     "legacy-fixtures/errorRecovery/fixtures/_error_/interface-multiple-extends/fixture.ts",
-    "legacy-fixtures/errorRecovery/fixtures/_error_/interface-property-export/fixture.ts",
     "legacy-fixtures/errorRecovery/fixtures/_error_/interface-property-private/fixture.ts",
     "legacy-fixtures/errorRecovery/fixtures/_error_/interface-property-protected/fixture.ts",
     "legacy-fixtures/errorRecovery/fixtures/_error_/interface-property-public/fixture.ts",
     "legacy-fixtures/errorRecovery/fixtures/_error_/interface-property-static/fixture.ts",
-    "legacy-fixtures/errorRecovery/fixtures/_error_/interface-property-with-default-value/fixture.ts",
     "legacy-fixtures/errorRecovery/fixtures/_error_/interface-with-optional-index-signature/fixture.ts",
-    "legacy-fixtures/errorRecovery/fixtures/_error_/object-assertion-not-allowed/fixture.ts",
-    "legacy-fixtures/errorRecovery/fixtures/_error_/object-optional-not-allowed/fixture.ts",
     "legacy-fixtures/errorRecovery/fixtures/_error_/solo-const/fixture.ts",
     "legacy-fixtures/parameter-decorators/fixtures/_error_/parameter-array-pattern-decorator/fixture.ts",
     "legacy-fixtures/parameter-decorators/fixtures/_error_/parameter-rest-element-decorator/fixture.ts",

diff --git a/packages/typescript-estree/src/convert.ts b/packages/typescript-estree/src/convert.ts
@@ -662,7 +662,11 @@ export class Converter {
     }
 
     if (hasModifier(SyntaxKind.ExportKeyword, node)) {
-      result.export = true;
+      throw createError(
+        this.ast,
+        node.pos,
+        'A method signature cannot have an export modifier.',
+      );
     }
 
     if (hasModifier(SyntaxKind.StaticKeyword, node)) {
@@ -1047,6 +1051,20 @@ export class Converter {
       }
 
       case SyntaxKind.PropertyAssignment:
+        this.#throwErrorIfDeprecatedPropertyExists(
+          node,
+          // eslint-disable-next-line deprecation/deprecation
+          node.questionToken,
+          'A property assignment cannot have a question token.',
+        );
+
+        this.#throwErrorIfDeprecatedPropertyExists(
+          node,
+          // eslint-disable-next-line deprecation/deprecation
+          node.exclamationToken,
+          'A property assignment cannot have an exclamation token.',
+        );
+
         return this.createNode<TSESTree.Property>(node, {
           type: AST_NODE_TYPES.Property,
           key: this.convertChild(node.name),
@@ -1058,6 +1076,27 @@ export class Converter {
         });
 
       case SyntaxKind.ShorthandPropertyAssignment: {
+        this.#throwErrorIfDeprecatedPropertyExists(
+          node,
+          // eslint-disable-next-line deprecation/deprecation
+          node.modifiers,
+          'A shorthand property assignment cannot have modifiers.',
+        );
+
+        this.#throwErrorIfDeprecatedPropertyExists(
+          node,
+          // eslint-disable-next-line deprecation/deprecation
+          node.questionToken,
+          'A shorthand property assignment cannot have a question token.',
+        );
+
+        this.#throwErrorIfDeprecatedPropertyExists(
+          node,
+          // eslint-disable-next-line deprecation/deprecation
+          node.exclamationToken,
+          'A shorthand property assignment cannot have an exclamation token.',
+        );
+
         if (node.objectAssignmentInitializer) {
           return this.createNode<TSESTree.Property>(node, {
             type: AST_NODE_TYPES.Property,
@@ -1609,13 +1648,20 @@ export class Converter {
 
         const modifiers = getModifiers(node);
         if (modifiers) {
+          if (hasModifier(SyntaxKind.ExportKeyword, node)) {
+            throw createError(
+              this.ast,
+              node.pos,
+              'A parameter cannot have an export modifier.',
+            );
+          }
+
           return this.createNode<TSESTree.TSParameterProperty>(node, {
             type: AST_NODE_TYPES.TSParameterProperty,
             accessibility: getTSNodeAccessibility(node) ?? undefined,
             readonly:
               hasModifier(SyntaxKind.ReadonlyKeyword, node) || undefined,
             static: hasModifier(SyntaxKind.StaticKeyword, node) || undefined,
-            export: hasModifier(SyntaxKind.ExportKeyword, node) || undefined,
             override:
               hasModifier(SyntaxKind.OverrideKeyword, node) || undefined,
             parameter: result,
@@ -2458,6 +2504,21 @@ export class Converter {
       }
 
       case SyntaxKind.PropertySignature: {
+        this.#throwErrorIfDeprecatedPropertyExists(
+          node,
+          // eslint-disable-next-line deprecation/deprecation
+          node.initializer,
+          'A property signature cannot have an initializer.',
+        );
+
+        if (hasModifier(SyntaxKind.ExportKeyword, node)) {
+          throw createError(
+            this.ast,
+            node.pos,
+            'A property signature cannot have an export modifier.',
+          );
+        }
+
         const result = this.createNode<TSESTree.TSPropertySignature>(node, {
           type: AST_NODE_TYPES.TSPropertySignature,
           optional: isOptional(node) || undefined,
@@ -2466,14 +2527,8 @@ export class Converter {
           typeAnnotation: node.type
             ? this.convertTypeAnnotation(node.type, node)
             : undefined,
-          initializer:
-            this.convertChild(
-              // eslint-disable-next-line deprecation/deprecation -- TODO breaking change remove this from the AST
-              node.initializer,
-            ) || undefined,
           readonly: hasModifier(SyntaxKind.ReadonlyKeyword, node) || undefined,
           static: hasModifier(SyntaxKind.StaticKeyword, node) || undefined,
-          export: hasModifier(SyntaxKind.ExportKeyword, node) || undefined,
         });
 
         const accessibility = getTSNodeAccessibility(node);
@@ -2504,7 +2559,11 @@ export class Converter {
         }
 
         if (hasModifier(SyntaxKind.ExportKeyword, node)) {
-          result.export = true;
+          throw createError(
+            this.ast,
+            node.pos,
+            'An index signature cannot have an export modifier.',
+          );
         }
 
         if (hasModifier(SyntaxKind.StaticKeyword, node)) {
@@ -2531,6 +2590,13 @@ export class Converter {
       }
 
       case SyntaxKind.FunctionType:
+        this.#throwErrorIfDeprecatedPropertyExists(
+          node,
+          // eslint-disable-next-line deprecation/deprecation
+          node.modifiers,
+          'A function type cannot have modifiers.',
+        );
+      // intentional fallthrough
       case SyntaxKind.ConstructSignature:
       case SyntaxKind.CallSignature: {
         const type =
@@ -2959,4 +3025,14 @@ export class Converter {
         return this.deeplyCopy(node);
     }
   }
+
+  #throwErrorIfDeprecatedPropertyExists<Node extends ts.Node>(
+    node: Node,
+    property: unknown,
+    message: string,
+  ): void {
+    if (property) {
+      throw createError(this.ast, node.pos, message);
+    }
+  }
 }
diff --git a/packages/visitor-keys/src/visitor-keys.ts b/packages/visitor-keys/src/visitor-keys.ts
@@ -170,7 +170,7 @@ const additionalKeys: AdditionalKeys = {
   JSXOpeningElement: ['name', 'typeParameters', 'attributes'],
   JSXOpeningFragment: [],
   JSXSpreadChild: ['expression'],
-  MethodDefinition: ['decorators', 'key', 'value', 'typeParameters'],
+  MethodDefinition: ['decorators', 'key', 'value'],
   NewExpression: ['callee', 'typeParameters', 'arguments'],
   ObjectPattern: ['decorators', 'properties', 'typeAnnotation'],
   PropertyDefinition: SharedVisitorKeys.PropertyDefinition,
@@ -227,7 +227,7 @@ const additionalKeys: AdditionalKeys = {
   TSOptionalType: ['typeAnnotation'],
   TSParameterProperty: ['decorators', 'parameter'],
   TSPrivateKeyword: [],
-  TSPropertySignature: ['typeAnnotation', 'key', 'initializer'],
+  TSPropertySignature: ['typeAnnotation', 'key'],
   TSProtectedKeyword: [],
   TSPublicKeyword: [],
   TSQualifiedName: ['left', 'right'],