Parse class fields and private methods by default (#13175)

* feat: materialize class features

* chore: move testcases to es2022

* chore: update test fixtures

* chore: remove classPr\w+ from options.json

* chore: remove empty options.json

* update flow test allowlist

* update typescript allowlist

packages/babel-parser/src/parser/error-message.js

@@ -189,7 +189,8 @@ export const ErrorMessages = makeErrorTemplates(
       "Leading decorators must be attached to a class declaration.",
     UnexpectedLexicalDeclaration:
       "Lexical declaration cannot appear in a single-statement context.",
-    UnexpectedNewTarget: "`new.target` can only be used in functions.",
+    UnexpectedNewTarget:
+      "`new.target` can only be used in functions or class properties.",
     UnexpectedNumericSeparator:
       "A numeric separator is only allowed between two digits.",
     UnexpectedPrivateField:

packages/babel-parser/src/parser/expression.js

@@ -1283,7 +1283,6 @@ export default class ExpressionParser extends LValParser {
     const isPrivate = this.match(tt.hash);
 
     if (isPrivate) {
-      this.expectOnePlugin(["classPrivateProperties", "classPrivateMethods"]);
       if (!isPrivateNameAllowed) {
         this.raise(this.state.pos, Errors.UnexpectedPrivateField);
       }
@@ -1520,15 +1519,7 @@ export default class ExpressionParser extends LValParser {
       const metaProp = this.parseMetaProperty(node, meta, "target");
 
       if (!this.scope.inNonArrowFunction && !this.scope.inClass) {
-        const errorTemplate = { ...Errors.UnexpectedNewTarget };
+        this.raise(metaProp.start, Errors.UnexpectedNewTarget);
-
-        if (this.hasPlugin("classProperties")) {
-          errorTemplate.template += " or class properties";
-        }
-
-        /* eslint-disable @babel/development-internal/dry-error-messages */
-        this.raise(metaProp.start, errorTemplate);
-        /* eslint-enable @babel/development-internal/dry-error-messages */
       }
 
       return metaProp;

packages/babel-parser/src/parser/statement.js

@@ -1564,8 +1564,6 @@ export default class StatementParser extends ExpressionParser {
     classBody: N.ClassBody,
     prop: N.ClassPrivateProperty,
   ) {
-    this.expectPlugin("classPrivateProperties", prop.key.start);
-
     const node = this.parseClassPrivateProperty(prop);
     classBody.body.push(node);
 
@@ -1603,8 +1601,6 @@ export default class StatementParser extends ExpressionParser {
     isGenerator: boolean,
     isAsync: boolean,
   ): void {
-    this.expectPlugin("classPrivateMethods", method.key.start);
-
     const node = this.parseMethod(
       method,
       isGenerator,
@@ -1650,9 +1646,6 @@ export default class StatementParser extends ExpressionParser {
 
   // https://tc39.es/proposal-class-fields/#prod-FieldDefinition
   parseClassProperty(node: N.ClassProperty): N.ClassProperty {
-    if (!node.typeAnnotation || this.match(tt.eq)) {
-      this.expectPlugin("classProperties");
-    }
     this.parseInitializer(node);
     this.semicolon();
     return this.finishNode(node, "ClassProperty");

packages/babel-parser/test/fixtures/es2015/meta-properties/invalid-arrow-function/output.json

@@ -2,7 +2,7 @@
   "type": "File",
   "start":0,"end":33,"loc":{"start":{"line":1,"column":0},"end":{"line":3,"column":1}},
   "errors": [
-    "SyntaxError: `new.target` can only be used in functions. (2:2)"
+    "SyntaxError: `new.target` can only be used in functions or class properties. (2:2)"
   ],
   "program": {
     "type": "Program",

packages/babel-parser/test/fixtures/es2015/meta-properties/new-target-invalid/output.json

@@ -2,7 +2,7 @@
   "type": "File",
   "start":0,"end":10,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":10}},
   "errors": [
-    "SyntaxError: `new.target` can only be used in functions. (1:0)"
+    "SyntaxError: `new.target` can only be used in functions or class properties. (1:0)"
   ],
   "program": {
     "type": "Program",

packages/babel-parser/test/fixtures/es2017/async-functions/no-method-asi/options.json

@@ -1,3 +0,0 @@
-{
-  "throws": "This experimental syntax requires enabling the parser plugin: 'classProperties' (3:2)"
-}

packages/babel-parser/test/fixtures/es2017/async-functions/no-method-asi/output.json

@@ -0,0 +1,63 @@
+{
+  "type": "File",
+  "start":0,"end":27,"loc":{"start":{"line":1,"column":0},"end":{"line":4,"column":1}},
+  "program": {
+    "type": "Program",
+    "start":0,"end":27,"loc":{"start":{"line":1,"column":0},"end":{"line":4,"column":1}},
+    "sourceType": "script",
+    "interpreter": null,
+    "body": [
+      {
+        "type": "ClassDeclaration",
+        "start":0,"end":27,"loc":{"start":{"line":1,"column":0},"end":{"line":4,"column":1}},
+        "id": {
+          "type": "Identifier",
+          "start":6,"end":7,"loc":{"start":{"line":1,"column":6},"end":{"line":1,"column":7},"identifierName":"A"},
+          "name": "A"
+        },
+        "superClass": null,
+        "body": {
+          "type": "ClassBody",
+          "start":8,"end":27,"loc":{"start":{"line":1,"column":8},"end":{"line":4,"column":1}},
+          "body": [
+            {
+              "type": "ClassProperty",
+              "start":12,"end":17,"loc":{"start":{"line":2,"column":2},"end":{"line":2,"column":7}},
+              "static": false,
+              "key": {
+                "type": "Identifier",
+                "start":12,"end":17,"loc":{"start":{"line":2,"column":2},"end":{"line":2,"column":7},"identifierName":"async"},
+                "name": "async"
+              },
+              "computed": false,
+              "value": null
+            },
+            {
+              "type": "ClassMethod",
+              "start":20,"end":25,"loc":{"start":{"line":3,"column":2},"end":{"line":3,"column":7}},
+              "static": false,
+              "key": {
+                "type": "Identifier",
+                "start":20,"end":21,"loc":{"start":{"line":3,"column":2},"end":{"line":3,"column":3},"identifierName":"a"},
+                "name": "a"
+              },
+              "computed": false,
+              "kind": "method",
+              "id": null,
+              "generator": false,
+              "async": false,
+              "params": [],
+              "body": {
+                "type": "BlockStatement",
+                "start":23,"end":25,"loc":{"start":{"line":3,"column":5},"end":{"line":3,"column":7}},
+                "body": [],
+                "directives": []
+              }
+            }
+          ]
+        }
+      }
+    ],
+    "directives": []
+  }
+}

packages/babel-parser/test/fixtures/es2018/async-generators/class-method-no-asi/options.json

@@ -1,3 +0,0 @@
-{
-  "throws": "This experimental syntax requires enabling the parser plugin: 'classProperties' (3:2)"
-}

packages/babel-parser/test/fixtures/es2018/async-generators/class-method-no-asi/output.json

@@ -0,0 +1,63 @@
+{
+  "type": "File",
+  "start":0,"end":29,"loc":{"start":{"line":1,"column":0},"end":{"line":4,"column":1}},
+  "program": {
+    "type": "Program",
+    "start":0,"end":29,"loc":{"start":{"line":1,"column":0},"end":{"line":4,"column":1}},
+    "sourceType": "script",
+    "interpreter": null,
+    "body": [
+      {
+        "type": "ClassDeclaration",
+        "start":0,"end":29,"loc":{"start":{"line":1,"column":0},"end":{"line":4,"column":1}},
+        "id": {
+          "type": "Identifier",
+          "start":6,"end":7,"loc":{"start":{"line":1,"column":6},"end":{"line":1,"column":7},"identifierName":"A"},
+          "name": "A"
+        },
+        "superClass": null,
+        "body": {
+          "type": "ClassBody",
+          "start":8,"end":29,"loc":{"start":{"line":1,"column":8},"end":{"line":4,"column":1}},
+          "body": [
+            {
+              "type": "ClassProperty",
+              "start":12,"end":17,"loc":{"start":{"line":2,"column":2},"end":{"line":2,"column":7}},
+              "static": false,
+              "key": {
+                "type": "Identifier",
+                "start":12,"end":17,"loc":{"start":{"line":2,"column":2},"end":{"line":2,"column":7},"identifierName":"async"},
+                "name": "async"
+              },
+              "computed": false,
+              "value": null
+            },
+            {
+              "type": "ClassMethod",
+              "start":20,"end":27,"loc":{"start":{"line":3,"column":2},"end":{"line":3,"column":9}},
+              "static": false,
+              "kind": "method",
+              "key": {
+                "type": "Identifier",
+                "start":22,"end":23,"loc":{"start":{"line":3,"column":4},"end":{"line":3,"column":5},"identifierName":"a"},
+                "name": "a"
+              },
+              "computed": false,
+              "id": null,
+              "generator": true,
+              "async": false,
+              "params": [],
+              "body": {
+                "type": "BlockStatement",
+                "start":25,"end":27,"loc":{"start":{"line":3,"column":7},"end":{"line":3,"column":9}},
+                "body": [],
+                "directives": []
+              }
+            }
+          ]
+        }
+      }
+    ],
+    "directives": []
+  }
+}

packages/babel-parser/test/fixtures/es2022/class-private-methods/asi-failure-generator/options.json

@@ -0,0 +1,3 @@
+{
+  "throws": "Unexpected token (3:3)"
+}