feat(typescript-estree): add support for class static blocks

README.md

@@ -233,7 +233,7 @@ The latest version under the `canary` tag **(latest commit to master)** is:
 
 ## Supported TypeScript Version
 
-**The version range of TypeScript currently supported by this parser is `>=3.3.1 <4.4.0`.**
+**The version range of TypeScript currently supported by this parser is `>=3.3.1 <4.5.0`.**
 
 These versions are what we test against.
 

package.json

@@ -121,12 +121,12 @@
     "ts-jest": "^27.0.1",
     "ts-node": "^10.0.0",
     "tslint": "^6.1.3",
-    "typescript": ">=3.3.1 <4.4.0"
+    "typescript": ">=3.3.1 <4.5.0"
   },
   "resolutions": {
     "@types/node": "^15.6.1",
     "jest-diff": "^27.0.0",
     "pretty-format": "^27.0.0",
-    "typescript": "4.3.5"
+    "typescript": "4.4.2"
   }
 }

packages/ast-spec/src/ast-node-types.ts

@@ -68,6 +68,7 @@ export enum AST_NODE_TYPES {
   ReturnStatement = 'ReturnStatement',
   SequenceExpression = 'SequenceExpression',
   SpreadElement = 'SpreadElement',
+  StaticBlock = 'StaticBlock',
   Super = 'Super',
   SwitchCase = 'SwitchCase',
   SwitchStatement = 'SwitchStatement',

packages/ast-spec/src/element/StaticBlock/spec.ts

@@ -0,0 +1,8 @@
+import type { AST_NODE_TYPES } from '../../ast-node-types';
+import type { BaseNode } from '../../base/BaseNode';
+import type { Statement } from '../../unions/Statement';
+
+export interface StaticBlock extends BaseNode {
+  type: AST_NODE_TYPES.StaticBlock;
+  body: Statement[];
+}

packages/ast-spec/src/element/spec.ts

@@ -2,6 +2,7 @@ export * from './ClassProperty/spec';
 export * from './MethodDefinition/spec';
 export * from './Property/spec';
 export * from './SpreadElement/spec';
+export * from './StaticBlock/spec';
 export * from './TSAbstractClassProperty/spec';
 export * from './TSAbstractMethodDefinition/spec';
 export * from './TSCallSignatureDeclaration/spec';

packages/ast-spec/src/token/PunctuatorToken/PunctuatorTokenToText.ts

@@ -45,7 +45,7 @@ export interface PunctuatorTokenToText {
   [SyntaxKind.AtToken]: '@';
   [SyntaxKind.QuestionQuestionToken]: '??';
   [SyntaxKind.BacktickToken]: '`';
-  // [SyntaxKind.HashToken]: '#'; // new in PunctuationSyntaxKind in TS 4.4
+  [SyntaxKind.HashToken]: '#';
   [SyntaxKind.EqualsToken]: '=';
   [SyntaxKind.PlusEqualsToken]: '+=';
   [SyntaxKind.MinusEqualsToken]: '-=';
@@ -58,8 +58,8 @@ export interface PunctuatorTokenToText {
   [SyntaxKind.GreaterThanGreaterThanGreaterThanEqualsToken]: '>>>=';
   [SyntaxKind.AmpersandEqualsToken]: '&=';
   [SyntaxKind.BarEqualsToken]: '|=';
-  [SyntaxKind.BarBarEqualsToken]: '||='; // included in PunctuationSyntaxKind in TS 4.4
-  [SyntaxKind.AmpersandAmpersandEqualsToken]: '&&='; // included in PunctuationSyntaxKind in TS 4.4
-  [SyntaxKind.QuestionQuestionEqualsToken]: '??='; // included in PunctuationSyntaxKind in TS 4.4
+  [SyntaxKind.BarBarEqualsToken]: '||=';
+  [SyntaxKind.AmpersandAmpersandEqualsToken]: '&&=';
+  [SyntaxKind.QuestionQuestionEqualsToken]: '??=';
   [SyntaxKind.CaretEqualsToken]: '^=';
 }

packages/ast-spec/src/unions/ClassElement.ts

@@ -1,12 +1,14 @@
 import type { ClassProperty } from '../element/ClassProperty/spec';
 import type { MethodDefinition } from '../element/MethodDefinition/spec';
+import type { StaticBlock } from '../element/StaticBlock/spec';
 import type { TSAbstractClassProperty } from '../element/TSAbstractClassProperty/spec';
 import type { TSAbstractMethodDefinition } from '../element/TSAbstractMethodDefinition/spec';
 import type { TSIndexSignature } from '../element/TSIndexSignature/spec';
 
 export type ClassElement =
   | ClassProperty
   | MethodDefinition
+  | StaticBlock
   | TSAbstractClassProperty
   | TSAbstractMethodDefinition
   | TSIndexSignature;

packages/ast-spec/src/unions/Node.ts

@@ -16,6 +16,7 @@ import type { ClassProperty } from '../element/ClassProperty/spec';
 import type { MethodDefinition } from '../element/MethodDefinition/spec';
 import type { Property } from '../element/Property/spec';
 import type { SpreadElement } from '../element/SpreadElement/spec';
+import type { StaticBlock } from '../element/StaticBlock/spec';
 import type { TSAbstractClassProperty } from '../element/TSAbstractClassProperty/spec';
 import type { TSAbstractMethodDefinition } from '../element/TSAbstractMethodDefinition/spec';
 import type { TSCallSignatureDeclaration } from '../element/TSCallSignatureDeclaration/spec';
@@ -235,6 +236,7 @@ export type Node =
   | ReturnStatement
   | SequenceExpression
   | SpreadElement
+  | StaticBlock
   | Super
   | SwitchCase
   | SwitchStatement

packages/eslint-plugin/src/rules/indent-new-do-not-use/OffsetStorage.ts

@@ -179,7 +179,7 @@ export class OffsetStorage {
       fromToken.range[1] <= range[1];
     // this has to be before the delete + insert below or else you'll get into a cycle
     const fromTokenDescriptor = fromTokenIsInRange
-      ? this.getOffsetDescriptor(fromToken!)
+      ? this.getOffsetDescriptor(fromToken)
       : null;
 
     // First, remove any existing nodes in the range from the tree.
@@ -193,8 +193,8 @@ export class OffsetStorage {
      * even if it's in the current range.
      */
     if (fromTokenIsInRange) {
-      this.tree.insert(fromToken!.range[0], fromTokenDescriptor!);
-      this.tree.insert(fromToken!.range[1], descriptorToInsert);
+      this.tree.insert(fromToken.range[0], fromTokenDescriptor!);
+      this.tree.insert(fromToken.range[1], descriptorToInsert);
     }
 
     /*

packages/parser/tests/tools/test-utils.ts

@@ -59,7 +59,7 @@ export function createSnapshotTestBlock(
        * AST_NODE_TYPE, we rethrow to cause the test to fail
        */
       if (/Unknown AST_NODE_TYPE/.exec((error as Error).message)) {
-        throw new Error(error);
+        throw error;
       }
       expect(parse).toThrowErrorMatchingSnapshot();
     }

packages/scope-manager/tests/fixtures.test.ts

@@ -139,7 +139,10 @@ function nestDescribe(
 
       try {
         makeDir.sync(fixture.snapshotPath);
-      } catch (e) {
+      } catch (
+        // eslint-disable-next-line @typescript-eslint/no-explicit-any
+        e: any
+      ) {
         if ('code' in e && e.code === 'EEXIST') {
           // already exists - ignored
         } else {

packages/shared-fixtures/fixtures/typescript/basics/class-static-blocks.src.ts

@@ -0,0 +1,8 @@
+class Foo {
+  static count = 0;
+  static {
+    if (someCondition()) {
+      count++;
+    }
+  }
+}

packages/typescript-estree/src/convert.ts

@@ -311,7 +311,11 @@ export class Converter {
    */
   private convertBodyExpressions(
     nodes: ts.NodeArray<ts.Statement>,
-    parent: ts.SourceFile | ts.Block | ts.ModuleBlock,
+    parent:
+      | ts.SourceFile
+      | ts.Block
+      | ts.ModuleBlock
+      | ts.ClassStaticBlockDeclaration,
   ): TSESTree.Statement[] {
     let allowDirectives = canContainDirective(parent);
 
@@ -2824,6 +2828,13 @@ export class Converter {
         return result;
       }
 
+      case SyntaxKind.ClassStaticBlockDeclaration: {
+        return this.createNode<TSESTree.StaticBlock>(node, {
+          type: AST_NODE_TYPES.StaticBlock,
+          body: this.convertBodyExpressions(node.body.statements, node),
+        });
+      }
+
       default:
         return this.deeplyCopy(node);
     }

packages/typescript-estree/src/node-utils.ts

@@ -194,7 +194,11 @@ export function getLocFor(
  * @returns returns true if node can contain directive
  */
 export function canContainDirective(
-  node: ts.SourceFile | ts.Block | ts.ModuleBlock,
+  node:
+    | ts.SourceFile
+    | ts.Block
+    | ts.ModuleBlock
+    | ts.ClassStaticBlockDeclaration,
 ): boolean {
   if (node.kind === ts.SyntaxKind.Block) {
     switch (node.parent.kind) {

packages/typescript-estree/src/parser.ts

@@ -30,12 +30,12 @@ const log = debug('typescript-eslint:typescript-estree:parser');
  * This needs to be kept in sync with the top-level README.md in the
  * typescript-eslint monorepo
  */
-const SUPPORTED_TYPESCRIPT_VERSIONS = '>=3.3.1 <4.4.0';
+const SUPPORTED_TYPESCRIPT_VERSIONS = '>=3.3.1 <4.5.0';
 /*
  * The semver package will ignore prerelease ranges, and we don't want to explicitly document every one
  * List them all separately here, so we can automatically create the full string
  */
-const SUPPORTED_PRERELEASE_RANGES: string[] = ['4.3.0-beta', '4.3.1-rc'];
+const SUPPORTED_PRERELEASE_RANGES: string[] = ['4.4.0-beta', '4.4.1-rc'];
 const ACTIVE_TYPESCRIPT_VERSION = ts.version;
 const isRunningSupportedTypeScriptVersion = semver.satisfies(
   ACTIVE_TYPESCRIPT_VERSION,

packages/typescript-estree/src/ts-estree/estree-to-ts-node-types.ts

@@ -135,6 +135,7 @@ export interface EstreeToTsNodeTypes {
   [AST_NODE_TYPES.ReturnStatement]: ts.ReturnStatement;
   [AST_NODE_TYPES.SequenceExpression]: ts.BinaryExpression;
   [AST_NODE_TYPES.SpreadElement]: ts.SpreadElement | ts.SpreadAssignment;
+  [AST_NODE_TYPES.StaticBlock]: ts.ClassStaticBlockDeclaration;
   [AST_NODE_TYPES.Super]: ts.SuperExpression;
   [AST_NODE_TYPES.SwitchCase]: ts.CaseClause | ts.DefaultClause;
   [AST_NODE_TYPES.SwitchStatement]: ts.SwitchStatement;

packages/typescript-estree/src/ts-estree/ts-nodes.ts

@@ -43,6 +43,7 @@ export type TSNode =
   | ts.KeywordTypeNode // TODO: This node is bad, maybe we should report this
   | ts.ImportTypeNode
   | ts.ThisTypeNode
+  | ts.ClassStaticBlockDeclaration
   // | ts.FunctionOrConstructorTypeNodeBase -> FunctionTypeNode, ConstructorTypeNode
   | ts.ConstructorTypeNode
   | ts.FunctionTypeNode

packages/typescript-estree/tests/ast-alignment/parse.ts

@@ -26,6 +26,7 @@ function parseWithBabelParser(text: string, jsx = true): File {
   const plugins: ParserPlugin[] = [
     'classProperties',
     'decorators-legacy',
+    'classStaticBlock',
     'estree',
     'typescript',
   ];
@@ -61,7 +62,7 @@ function parseWithTypeScriptESTree(text: string, jsx = true): parser.AST<any> {
       jsx,
     });
     return result.ast;
-  } catch (e) {
+  } catch (e: any) {
     throw createError(e.message, e.lineNumber, e.column);
   }
 }
@@ -97,7 +98,7 @@ export function parse(
           'Please provide a valid parser: either "typescript-estree" or "@babel/parser"',
         );
     }
-  } catch (error) {
+  } catch (error: any) {
     const loc = error.loc as TSESTree.LineAndColumnData | undefined;
     if (loc) {
       error.codeFrame = codeFrameColumns(

packages/typescript-estree/tests/ast-alignment/utils.ts

@@ -250,6 +250,16 @@ export function preprocessBabylonAST(ast: BabelTypes.File): any {
           }
         }
       },
+      /**
+       * Babel adds a `static` property to the StaticBlock when the
+       * `typescript` plugin and the `classStaticBlock` plugin are enabled.
+       * @see https://github.com/babel/babel/issues/13674
+       */
+      StaticBlock(node: any) {
+        if (node.static != null) {
+          delete node.static;
+        }
+      },
     },
   );
 }

packages/typescript-estree/tests/ast-fixtures.test.ts

@@ -58,7 +58,10 @@ function nestDescribe(
 
       try {
         makeDir.sync(fixture.snapshotPath);
-      } catch (e) {
+      } catch (
+        // eslint-disable-next-line @typescript-eslint/no-explicit-any
+        e: any
+      ) {
         if ('code' in e && e.code === 'EEXIST') {
           // already exists - ignored
         } else {

packages/typescript-estree/tests/lib/__snapshots__/semantic-diagnostics-enabled.test.ts.snap

@@ -1408,8 +1408,8 @@ TSError {
 
 exports[`Parse all fixtures with "errorOnTypeScriptSyntacticAndSemanticIssues" enabled fixtures/jsx/invalid-mismatched-closing-tag.src 1`] = `
 TSError {
-  "column": 3,
-  "index": 3,
+  "column": 5,
+  "index": 5,
   "lineNumber": 1,
   "message": "Expected corresponding JSX closing tag for 'a'.",
 }
@@ -1426,17 +1426,17 @@ TSError {
 
 exports[`Parse all fixtures with "errorOnTypeScriptSyntacticAndSemanticIssues" enabled fixtures/jsx/invalid-mismatched-dot-tag-name.src 1`] = `
 TSError {
-  "column": 7,
-  "index": 7,
+  "column": 9,
+  "index": 9,
   "lineNumber": 1,
   "message": "Expected corresponding JSX closing tag for 'a.b.c'.",
 }
 `;
 
 exports[`Parse all fixtures with "errorOnTypeScriptSyntacticAndSemanticIssues" enabled fixtures/jsx/invalid-mismatched-namespace-tag.src 1`] = `
 TSError {
-  "column": 5,
-  "index": 5,
+  "column": 7,
+  "index": 7,
   "lineNumber": 1,
   "message": "Expected corresponding JSX closing tag for 'a:b'.",
 }
@@ -1742,6 +1742,8 @@ exports[`Parse all fixtures with "errorOnTypeScriptSyntacticAndSemanticIssues" e
 
 exports[`Parse all fixtures with "errorOnTypeScriptSyntacticAndSemanticIssues" enabled fixtures/typescript/basics/class-multi-line-keyword-declare.src 1`] = `"TEST OUTPUT: No semantic or syntactic issues found"`;
 
+exports[`Parse all fixtures with "errorOnTypeScriptSyntacticAndSemanticIssues" enabled fixtures/typescript/basics/class-static-blocks.src 1`] = `"TEST OUTPUT: No semantic or syntactic issues found"`;
+
 exports[`Parse all fixtures with "errorOnTypeScriptSyntacticAndSemanticIssues" enabled fixtures/typescript/basics/class-with-accessibility-modifiers.src 1`] = `"TEST OUTPUT: No semantic or syntactic issues found"`;
 
 exports[`Parse all fixtures with "errorOnTypeScriptSyntacticAndSemanticIssues" enabled fixtures/typescript/basics/class-with-constructor-and-modifier.src 1`] = `"TEST OUTPUT: No semantic or syntactic issues found"`;

packages/typescript-estree/tests/lib/parse.test.ts

@@ -50,7 +50,10 @@ describe('parseWithNodeMaps()', () => {
     it('should have correct column number when strict mode error occurs', () => {
       try {
         parser.parseWithNodeMaps('function fn(a, a) {\n}');
-      } catch (err) {
+      } catch (
+        // eslint-disable-next-line @typescript-eslint/no-explicit-any
+        err: any
+      ) {
         expect(err.column).toEqual(16);
       }
     });
@@ -505,7 +508,10 @@ describe('parseAndGenerateServices', () => {
           /**
            * Aligns paths between environments, node for windows uses `\`, for linux and mac uses `/`
            */
-          error.message = (error as Error).message.replace(/\\(?!["])/gm, '/');
+          (error as Error).message = (error as Error).message.replace(
+            /\\(?!["])/gm,
+            '/',
+          );
           throw error;
         }
       };

packages/typescript-estree/tests/snapshots/jsx/invalid-mismatched-closing-tag.src.js.shot

@@ -2,8 +2,8 @@
 
 exports[`jsx invalid-mismatched-closing-tag.src 1`] = `
 TSError {
-  "column": 3,
-  "index": 3,
+  "column": 5,
+  "index": 5,
   "lineNumber": 1,
   "message": "Expected corresponding JSX closing tag for 'a'.",
 }

packages/typescript-estree/tests/snapshots/jsx/invalid-mismatched-dot-tag-name.src.js.shot

@@ -2,8 +2,8 @@
 
 exports[`jsx invalid-mismatched-dot-tag-name.src 1`] = `
 TSError {
-  "column": 7,
-  "index": 7,
+  "column": 9,
+  "index": 9,
   "lineNumber": 1,
   "message": "Expected corresponding JSX closing tag for 'a.b.c'.",
 }

packages/typescript-estree/tests/snapshots/jsx/invalid-mismatched-namespace-tag.src.js.shot

@@ -2,8 +2,8 @@
 
 exports[`jsx invalid-mismatched-namespace-tag.src 1`] = `
 TSError {
-  "column": 5,
-  "index": 5,
+  "column": 7,
+  "index": 7,
   "lineNumber": 1,
   "message": "Expected corresponding JSX closing tag for 'a:b'.",
 }