Parse static blocks with typescript plugin (#13243)

* Support static blocks with typescript

* Add tests

* Reuse isStatic var

* Disallow parsing static blocks with modifiers

* Add tests

* Raise recoverable errors

* Address review

* Add tests for static static {}

packages/babel-parser/src/plugins/typescript/index.js

@@ -131,6 +131,8 @@ const TSErrors = makeErrorTemplates(
       "A 'set' accessor cannot have rest parameter.",
     SetAccesorCannotHaveReturnType:
       "A 'set' accessor cannot have a return type annotation.",
+    StaticBlockCannotHaveModifier:
+      "Static class blocks cannot have any modifier.",
     TypeAnnotationAfterAssign:
       "Type annotations must come before default assignments, e.g. instead of `age = 25: number` use `age: number = 25`.",
     TypeImportCannotSpecifyDefaultAndNamed:
@@ -2317,34 +2319,49 @@ export default (superClass: Class<Parser>): Class<Parser> =>
       return this.tsParseModifier(["public", "protected", "private"]);
     }
 
+    tsHasSomeModifiers(member: any, modifiers: TsModifier[]): boolean {
+      return modifiers.some(modifier => {
+        if (tsIsAccessModifier(modifier)) {
+          return member.accessibility === modifier;
+        }
+        return !!member[modifier];
+      });
+    }
+
     parseClassMember(
       classBody: N.ClassBody,
       member: any,
       state: N.ParseClassMemberState,
     ): void {
-      this.tsParseModifiers(member, [
+      const invalidModifersForStaticBlocks = [
         "declare",
         "private",
         "public",
         "protected",
         "override",
-        "static",
         "abstract",
         "readonly",
-      ]);
+      ];
-
+      this.tsParseModifiers(
-      const callParseClassMember = () => {
-        this.parseClassMemberWithIsStatic(
-          classBody,
         member,
-          state,
+        invalidModifersForStaticBlocks.concat(["static"]),
-          !!member.static,
       );
+
+      const callParseClassMemberWithIsStatic = () => {
+        const isStatic = !!member.static;
+        if (isStatic && this.eat(tt.braceL)) {
+          if (this.tsHasSomeModifiers(member, invalidModifersForStaticBlocks)) {
+            this.raise(this.state.pos, TSErrors.StaticBlockCannotHaveModifier);
+          }
+          this.parseClassStaticBlock(classBody, ((member: any): N.StaticBlock));
+        } else {
+          this.parseClassMemberWithIsStatic(classBody, member, state, isStatic);
+        }
       };
       if (member.declare) {
-        this.tsInAmbientContext(callParseClassMember);
+        this.tsInAmbientContext(callParseClassMemberWithIsStatic);
       } else {
-        callParseClassMember();
+        callParseClassMemberWithIsStatic();
       }
     }
 

packages/babel-parser/test/fixtures/typescript/static-blocks/invalid-static-block-with-accessibility-private/input.ts

@@ -0,0 +1,3 @@
+class Foo {
+  static private {}
+}

packages/babel-parser/test/fixtures/typescript/static-blocks/invalid-static-block-with-accessibility-private/output.json

@@ -0,0 +1,40 @@
+{
+  "type": "File",
+  "start":0,"end":33,"loc":{"start":{"line":1,"column":0},"end":{"line":3,"column":1}},
+  "errors": [
+    "SyntaxError: 'private' modifier must precede 'static' modifier. (2:9)",
+    "SyntaxError: Static class blocks cannot have any modifier. (2:19)"
+  ],
+  "program": {
+    "type": "Program",
+    "start":0,"end":33,"loc":{"start":{"line":1,"column":0},"end":{"line":3,"column":1}},
+    "sourceType": "module",
+    "interpreter": null,
+    "body": [
+      {
+        "type": "ClassDeclaration",
+        "start":0,"end":33,"loc":{"start":{"line":1,"column":0},"end":{"line":3,"column":1}},
+        "id": {
+          "type": "Identifier",
+          "start":6,"end":9,"loc":{"start":{"line":1,"column":6},"end":{"line":1,"column":9},"identifierName":"Foo"},
+          "name": "Foo"
+        },
+        "superClass": null,
+        "body": {
+          "type": "ClassBody",
+          "start":10,"end":33,"loc":{"start":{"line":1,"column":10},"end":{"line":3,"column":1}},
+          "body": [
+            {
+              "type": "StaticBlock",
+              "start":14,"end":31,"loc":{"start":{"line":2,"column":2},"end":{"line":2,"column":19}},
+              "static": true,
+              "accessibility": "private",
+              "body": []
+            }
+          ]
+        }
+      }
+    ],
+    "directives": []
+  }
+}

packages/babel-parser/test/fixtures/typescript/static-blocks/invalid-static-block-with-accessibility-protected/input.ts

@@ -0,0 +1,3 @@
+class Foo {
+  static protected {}
+}

packages/babel-parser/test/fixtures/typescript/static-blocks/invalid-static-block-with-accessibility-protected/output.json

@@ -0,0 +1,40 @@
+{
+  "type": "File",
+  "start":0,"end":35,"loc":{"start":{"line":1,"column":0},"end":{"line":3,"column":1}},
+  "errors": [
+    "SyntaxError: 'protected' modifier must precede 'static' modifier. (2:9)",
+    "SyntaxError: Static class blocks cannot have any modifier. (2:21)"
+  ],
+  "program": {
+    "type": "Program",
+    "start":0,"end":35,"loc":{"start":{"line":1,"column":0},"end":{"line":3,"column":1}},
+    "sourceType": "module",
+    "interpreter": null,
+    "body": [
+      {
+        "type": "ClassDeclaration",
+        "start":0,"end":35,"loc":{"start":{"line":1,"column":0},"end":{"line":3,"column":1}},
+        "id": {
+          "type": "Identifier",
+          "start":6,"end":9,"loc":{"start":{"line":1,"column":6},"end":{"line":1,"column":9},"identifierName":"Foo"},
+          "name": "Foo"
+        },
+        "superClass": null,
+        "body": {
+          "type": "ClassBody",
+          "start":10,"end":35,"loc":{"start":{"line":1,"column":10},"end":{"line":3,"column":1}},
+          "body": [
+            {
+              "type": "StaticBlock",
+              "start":14,"end":33,"loc":{"start":{"line":2,"column":2},"end":{"line":2,"column":21}},
+              "static": true,
+              "accessibility": "protected",
+              "body": []
+            }
+          ]
+        }
+      }
+    ],
+    "directives": []
+  }
+}

packages/babel-parser/test/fixtures/typescript/static-blocks/invalid-static-block-with-accessibility-public/input.ts

@@ -0,0 +1,3 @@
+class Foo {
+  static public {}
+}

packages/babel-parser/test/fixtures/typescript/static-blocks/invalid-static-block-with-accessibility-public/output.json

@@ -0,0 +1,40 @@
+{
+  "type": "File",
+  "start":0,"end":32,"loc":{"start":{"line":1,"column":0},"end":{"line":3,"column":1}},
+  "errors": [
+    "SyntaxError: 'public' modifier must precede 'static' modifier. (2:9)",
+    "SyntaxError: Static class blocks cannot have any modifier. (2:18)"
+  ],
+  "program": {
+    "type": "Program",
+    "start":0,"end":32,"loc":{"start":{"line":1,"column":0},"end":{"line":3,"column":1}},
+    "sourceType": "module",
+    "interpreter": null,
+    "body": [
+      {
+        "type": "ClassDeclaration",
+        "start":0,"end":32,"loc":{"start":{"line":1,"column":0},"end":{"line":3,"column":1}},
+        "id": {
+          "type": "Identifier",
+          "start":6,"end":9,"loc":{"start":{"line":1,"column":6},"end":{"line":1,"column":9},"identifierName":"Foo"},
+          "name": "Foo"
+        },
+        "superClass": null,
+        "body": {
+          "type": "ClassBody",
+          "start":10,"end":32,"loc":{"start":{"line":1,"column":10},"end":{"line":3,"column":1}},
+          "body": [
+            {
+              "type": "StaticBlock",
+              "start":14,"end":30,"loc":{"start":{"line":2,"column":2},"end":{"line":2,"column":18}},
+              "static": true,
+              "accessibility": "public",
+              "body": []
+            }
+          ]
+        }
+      }
+    ],
+    "directives": []
+  }
+}

packages/babel-parser/test/fixtures/typescript/static-blocks/invalid-static-block-with-modifier-abstract/input.ts

@@ -0,0 +1,3 @@
+class Foo {
+  abstract static {}
+}

packages/babel-parser/test/fixtures/typescript/static-blocks/invalid-static-block-with-modifier-abstract/output.json

@@ -0,0 +1,40 @@
+{
+  "type": "File",
+  "start":0,"end":34,"loc":{"start":{"line":1,"column":0},"end":{"line":3,"column":1}},
+  "errors": [
+    "SyntaxError: 'static' modifier cannot be used with 'abstract' modifier. (2:11)",
+    "SyntaxError: Static class blocks cannot have any modifier. (2:20)"
+  ],
+  "program": {
+    "type": "Program",
+    "start":0,"end":34,"loc":{"start":{"line":1,"column":0},"end":{"line":3,"column":1}},
+    "sourceType": "module",
+    "interpreter": null,
+    "body": [
+      {
+        "type": "ClassDeclaration",
+        "start":0,"end":34,"loc":{"start":{"line":1,"column":0},"end":{"line":3,"column":1}},
+        "id": {
+          "type": "Identifier",
+          "start":6,"end":9,"loc":{"start":{"line":1,"column":6},"end":{"line":1,"column":9},"identifierName":"Foo"},
+          "name": "Foo"
+        },
+        "superClass": null,
+        "body": {
+          "type": "ClassBody",
+          "start":10,"end":34,"loc":{"start":{"line":1,"column":10},"end":{"line":3,"column":1}},
+          "body": [
+            {
+              "type": "StaticBlock",
+              "start":14,"end":32,"loc":{"start":{"line":2,"column":2},"end":{"line":2,"column":20}},
+              "abstract": true,
+              "static": true,
+              "body": []
+            }
+          ]
+        }
+      }
+    ],
+    "directives": []
+  }
+}

packages/babel-parser/test/fixtures/typescript/static-blocks/invalid-static-block-with-modifier-override/input.ts

@@ -0,0 +1,3 @@
+class Foo {
+  override static {}
+}

packages/babel-parser/test/fixtures/typescript/static-blocks/invalid-static-block-with-modifier-override/output.json

@@ -0,0 +1,40 @@
+{
+  "type": "File",
+  "start":0,"end":34,"loc":{"start":{"line":1,"column":0},"end":{"line":3,"column":1}},
+  "errors": [
+    "SyntaxError: 'static' modifier must precede 'override' modifier. (2:11)",
+    "SyntaxError: Static class blocks cannot have any modifier. (2:20)"
+  ],
+  "program": {
+    "type": "Program",
+    "start":0,"end":34,"loc":{"start":{"line":1,"column":0},"end":{"line":3,"column":1}},
+    "sourceType": "module",
+    "interpreter": null,
+    "body": [
+      {
+        "type": "ClassDeclaration",
+        "start":0,"end":34,"loc":{"start":{"line":1,"column":0},"end":{"line":3,"column":1}},
+        "id": {
+          "type": "Identifier",
+          "start":6,"end":9,"loc":{"start":{"line":1,"column":6},"end":{"line":1,"column":9},"identifierName":"Foo"},
+          "name": "Foo"
+        },
+        "superClass": null,
+        "body": {
+          "type": "ClassBody",
+          "start":10,"end":34,"loc":{"start":{"line":1,"column":10},"end":{"line":3,"column":1}},
+          "body": [
+            {
+              "type": "StaticBlock",
+              "start":14,"end":32,"loc":{"start":{"line":2,"column":2},"end":{"line":2,"column":20}},
+              "override": true,
+              "static": true,
+              "body": []
+            }
+          ]
+        }
+      }
+    ],
+    "directives": []
+  }
+}

packages/babel-parser/test/fixtures/typescript/static-blocks/invalid-static-block-with-modifier-static/input.ts

@@ -0,0 +1,3 @@
+class Foo {
+  static static {}
+}

packages/babel-parser/test/fixtures/typescript/static-blocks/invalid-static-block-with-modifier-static/output.json

@@ -0,0 +1,38 @@
+{
+  "type": "File",
+  "start":0,"end":32,"loc":{"start":{"line":1,"column":0},"end":{"line":3,"column":1}},
+  "errors": [
+    "SyntaxError: Duplicate modifier: 'static'. (2:9)"
+  ],
+  "program": {
+    "type": "Program",
+    "start":0,"end":32,"loc":{"start":{"line":1,"column":0},"end":{"line":3,"column":1}},
+    "sourceType": "module",
+    "interpreter": null,
+    "body": [
+      {
+        "type": "ClassDeclaration",
+        "start":0,"end":32,"loc":{"start":{"line":1,"column":0},"end":{"line":3,"column":1}},
+        "id": {
+          "type": "Identifier",
+          "start":6,"end":9,"loc":{"start":{"line":1,"column":6},"end":{"line":1,"column":9},"identifierName":"Foo"},
+          "name": "Foo"
+        },
+        "superClass": null,
+        "body": {
+          "type": "ClassBody",
+          "start":10,"end":32,"loc":{"start":{"line":1,"column":10},"end":{"line":3,"column":1}},
+          "body": [
+            {
+              "type": "StaticBlock",
+              "start":14,"end":30,"loc":{"start":{"line":2,"column":2},"end":{"line":2,"column":18}},
+              "static": true,
+              "body": []
+            }
+          ]
+        }
+      }
+    ],
+    "directives": []
+  }
+}

packages/babel-parser/test/fixtures/typescript/static-blocks/invalid-static-blocks-with-modifer-declare/input.ts

@@ -0,0 +1,3 @@
+class Foo {
+  declare static {}
+}

packages/babel-parser/test/fixtures/typescript/static-blocks/invalid-static-blocks-with-modifer-declare/output.json

@@ -0,0 +1,39 @@
+{
+  "type": "File",
+  "start":0,"end":33,"loc":{"start":{"line":1,"column":0},"end":{"line":3,"column":1}},
+  "errors": [
+    "SyntaxError: Static class blocks cannot have any modifier. (2:19)"
+  ],
+  "program": {
+    "type": "Program",
+    "start":0,"end":33,"loc":{"start":{"line":1,"column":0},"end":{"line":3,"column":1}},
+    "sourceType": "module",
+    "interpreter": null,
+    "body": [
+      {
+        "type": "ClassDeclaration",
+        "start":0,"end":33,"loc":{"start":{"line":1,"column":0},"end":{"line":3,"column":1}},
+        "id": {
+          "type": "Identifier",
+          "start":6,"end":9,"loc":{"start":{"line":1,"column":6},"end":{"line":1,"column":9},"identifierName":"Foo"},
+          "name": "Foo"
+        },
+        "superClass": null,
+        "body": {
+          "type": "ClassBody",
+          "start":10,"end":33,"loc":{"start":{"line":1,"column":10},"end":{"line":3,"column":1}},
+          "body": [
+            {
+              "type": "StaticBlock",
+              "start":14,"end":31,"loc":{"start":{"line":2,"column":2},"end":{"line":2,"column":19}},
+              "declare": true,
+              "static": true,
+              "body": []
+            }
+          ]
+        }
+      }
+    ],
+    "directives": []
+  }
+}

packages/babel-parser/test/fixtures/typescript/static-blocks/invalid-static-blocks-with-modifier-readonly/input.ts

@@ -0,0 +1,3 @@
+class Foo {
+  readonly static {}
+}

packages/babel-parser/test/fixtures/typescript/static-blocks/invalid-static-blocks-with-modifier-readonly/output.json

@@ -0,0 +1,40 @@
+{
+  "type": "File",
+  "start":0,"end":34,"loc":{"start":{"line":1,"column":0},"end":{"line":3,"column":1}},
+  "errors": [
+    "SyntaxError: 'static' modifier must precede 'readonly' modifier. (2:11)",
+    "SyntaxError: Static class blocks cannot have any modifier. (2:20)"
+  ],
+  "program": {
+    "type": "Program",
+    "start":0,"end":34,"loc":{"start":{"line":1,"column":0},"end":{"line":3,"column":1}},
+    "sourceType": "module",
+    "interpreter": null,
+    "body": [
+      {
+        "type": "ClassDeclaration",
+        "start":0,"end":34,"loc":{"start":{"line":1,"column":0},"end":{"line":3,"column":1}},
+        "id": {
+          "type": "Identifier",
+          "start":6,"end":9,"loc":{"start":{"line":1,"column":6},"end":{"line":1,"column":9},"identifierName":"Foo"},
+          "name": "Foo"
+        },
+        "superClass": null,
+        "body": {
+          "type": "ClassBody",
+          "start":10,"end":34,"loc":{"start":{"line":1,"column":10},"end":{"line":3,"column":1}},
+          "body": [
+            {
+              "type": "StaticBlock",
+              "start":14,"end":32,"loc":{"start":{"line":2,"column":2},"end":{"line":2,"column":20}},
+              "readonly": true,
+              "static": true,
+              "body": []
+            }
+          ]
+        }
+      }
+    ],
+    "directives": []
+  }
+}

packages/babel-parser/test/fixtures/typescript/static-blocks/options.json

@@ -0,0 +1,4 @@
+{
+  "plugins": ["classStaticBlock", "typescript"],
+  "sourceType": "module"
+}

packages/babel-parser/test/fixtures/typescript/static-blocks/static-blocks-and-proptery-named-static/input.ts

@@ -0,0 +1,4 @@
+class Foo {
+  static;
+  static {}
+}

packages/babel-parser/test/fixtures/typescript/static-blocks/static-blocks-and-proptery-named-static/output.json

@@ -0,0 +1,47 @@
+{
+  "type": "File",
+  "start":0,"end":35,"loc":{"start":{"line":1,"column":0},"end":{"line":4,"column":1}},
+  "program": {
+    "type": "Program",
+    "start":0,"end":35,"loc":{"start":{"line":1,"column":0},"end":{"line":4,"column":1}},
+    "sourceType": "module",
+    "interpreter": null,
+    "body": [
+      {
+        "type": "ClassDeclaration",
+        "start":0,"end":35,"loc":{"start":{"line":1,"column":0},"end":{"line":4,"column":1}},
+        "id": {
+          "type": "Identifier",
+          "start":6,"end":9,"loc":{"start":{"line":1,"column":6},"end":{"line":1,"column":9},"identifierName":"Foo"},
+          "name": "Foo"
+        },
+        "superClass": null,
+        "body": {
+          "type": "ClassBody",
+          "start":10,"end":35,"loc":{"start":{"line":1,"column":10},"end":{"line":4,"column":1}},
+          "body": [
+            {
+              "type": "ClassProperty",
+              "start":14,"end":21,"loc":{"start":{"line":2,"column":2},"end":{"line":2,"column":9}},
+              "static": false,
+              "key": {
+                "type": "Identifier",
+                "start":14,"end":20,"loc":{"start":{"line":2,"column":2},"end":{"line":2,"column":8},"identifierName":"static"},
+                "name": "static"
+              },
+              "computed": false,
+              "value": null
+            },
+            {
+              "type": "StaticBlock",
+              "start":24,"end":33,"loc":{"start":{"line":3,"column":2},"end":{"line":3,"column":11}},
+              "static": true,
+              "body": []
+            }
+          ]
+        }
+      }
+    ],
+    "directives": []
+  }
+}

packages/babel-parser/test/fixtures/typescript/static-blocks/static-blocks-and-static-property-named-static/input.ts

@@ -0,0 +1,4 @@
+class Foo {
+  static static;
+  static {}
+}

packages/babel-parser/test/fixtures/typescript/static-blocks/static-blocks-and-static-property-named-static/output.json

@@ -0,0 +1,47 @@
+{
+  "type": "File",
+  "start":0,"end":42,"loc":{"start":{"line":1,"column":0},"end":{"line":4,"column":1}},
+  "program": {
+    "type": "Program",
+    "start":0,"end":42,"loc":{"start":{"line":1,"column":0},"end":{"line":4,"column":1}},
+    "sourceType": "module",
+    "interpreter": null,
+    "body": [
+      {
+        "type": "ClassDeclaration",
+        "start":0,"end":42,"loc":{"start":{"line":1,"column":0},"end":{"line":4,"column":1}},
+        "id": {
+          "type": "Identifier",
+          "start":6,"end":9,"loc":{"start":{"line":1,"column":6},"end":{"line":1,"column":9},"identifierName":"Foo"},
+          "name": "Foo"
+        },
+        "superClass": null,
+        "body": {
+          "type": "ClassBody",
+          "start":10,"end":42,"loc":{"start":{"line":1,"column":10},"end":{"line":4,"column":1}},
+          "body": [
+            {
+              "type": "ClassProperty",
+              "start":14,"end":28,"loc":{"start":{"line":2,"column":2},"end":{"line":2,"column":16}},
+              "static": true,
+              "key": {
+                "type": "Identifier",
+                "start":21,"end":27,"loc":{"start":{"line":2,"column":9},"end":{"line":2,"column":15},"identifierName":"static"},
+                "name": "static"
+              },
+              "computed": false,
+              "value": null
+            },
+            {
+              "type": "StaticBlock",
+              "start":31,"end":40,"loc":{"start":{"line":3,"column":2},"end":{"line":3,"column":11}},
+              "static": true,
+              "body": []
+            }
+          ]
+        }
+      }
+    ],
+    "directives": []
+  }
+}

packages/babel-parser/test/fixtures/typescript/static-blocks/static-blocks-and-static-property/input.ts

@@ -0,0 +1,4 @@
+class Foo {
+  static foo;
+  static {}
+}

packages/babel-parser/test/fixtures/typescript/static-blocks/static-blocks-and-static-property/output.json

@@ -0,0 +1,47 @@
+{
+  "type": "File",
+  "start":0,"end":39,"loc":{"start":{"line":1,"column":0},"end":{"line":4,"column":1}},
+  "program": {
+    "type": "Program",
+    "start":0,"end":39,"loc":{"start":{"line":1,"column":0},"end":{"line":4,"column":1}},
+    "sourceType": "module",
+    "interpreter": null,
+    "body": [
+      {
+        "type": "ClassDeclaration",
+        "start":0,"end":39,"loc":{"start":{"line":1,"column":0},"end":{"line":4,"column":1}},
+        "id": {
+          "type": "Identifier",
+          "start":6,"end":9,"loc":{"start":{"line":1,"column":6},"end":{"line":1,"column":9},"identifierName":"Foo"},
+          "name": "Foo"
+        },
+        "superClass": null,
+        "body": {
+          "type": "ClassBody",
+          "start":10,"end":39,"loc":{"start":{"line":1,"column":10},"end":{"line":4,"column":1}},
+          "body": [
+            {
+              "type": "ClassProperty",
+              "start":14,"end":25,"loc":{"start":{"line":2,"column":2},"end":{"line":2,"column":13}},
+              "static": true,
+              "key": {
+                "type": "Identifier",
+                "start":21,"end":24,"loc":{"start":{"line":2,"column":9},"end":{"line":2,"column":12},"identifierName":"foo"},
+                "name": "foo"
+              },
+              "computed": false,
+              "value": null
+            },
+            {
+              "type": "StaticBlock",
+              "start":28,"end":37,"loc":{"start":{"line":3,"column":2},"end":{"line":3,"column":11}},
+              "static": true,
+              "body": []
+            }
+          ]
+        }
+      }
+    ],
+    "directives": []
+  }
+}

packages/babel-parser/test/fixtures/typescript/static-blocks/static-blocks/input.ts

@@ -0,0 +1,3 @@
+class Foo {
+  static {}
+}

packages/babel-parser/test/fixtures/typescript/static-blocks/static-blocks/output.json

@@ -0,0 +1,35 @@
+{
+  "type": "File",
+  "start":0,"end":25,"loc":{"start":{"line":1,"column":0},"end":{"line":3,"column":1}},
+  "program": {
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