feat(es/parser): Enforce order of abstract and override (#1668)

Co-authored-by: 강동윤 <kdy1997.dev@gmail.com>

ecmascript/parser/Cargo.toml

@@ -7,7 +7,7 @@ include = ["Cargo.toml", "src/**/*.rs", "examples/**/*.rs"]
 license = "Apache-2.0/MIT"
 name = "swc_ecma_parser"
 repository = "https://github.com/swc-project/swc.git"
-version = "0.56.0"
+version = "0.56.1"
 
 [features]
 default = []

ecmascript/parser/src/parser/class_and_fn.rs

@@ -458,6 +458,11 @@ impl<'a, I: Tokens> Parser<I> {
                             self.input.prev_span(),
                             SyntaxError::TS1030(js_word!("abstract")),
                         );
+                    } else if is_override {
+                        self.emit_err(
+                            self.input.prev_span(),
+                            SyntaxError::TS1029(js_word!("abstract"), js_word!("override")),
+                        );
                     } else {
                         is_abstract = true;
                     }

ecmascript/parser/tests/typescript-errors/class/override-with-abstract/input.ts

@@ -0,0 +1,3 @@
+abstract class MyClass extends BaseClass {
+  override abstract show(): void
+}

ecmascript/parser/tests/typescript-errors/class/override-with-abstract/input.ts.stderr

@@ -0,0 +1,6 @@
+error: 'abstract' modifier must precede 'override' modifier.
+ --> $DIR/tests/typescript-errors/class/override-with-abstract/input.ts:2:12
+  |
+2 |   override abstract show(): void
+  |            ^^^^^^^^
+

ecmascript/parser/tests/typescript/class/modifier-override/input.ts

@@ -4,7 +4,6 @@ class MyClass1 extends BaseClass {
   public override show() {}
   override size = 5;
   override readonly size = 5;
-  override readonly abstract size = 5;
   abstract override readonly size = 5;
   private abstract override readonly size = 5;
   static override show() {}

ecmascript/parser/tests/typescript/class/modifier-override/input.ts.json

@@ -2,7 +2,7 @@
   "type": "Script",
   "span": {
     "start": 0,
-    "end": 305,
+    "end": 266,
     "ctxt": 0
   },
   "body": [
@@ -21,7 +21,7 @@
       "declare": false,
       "span": {
         "start": 0,
-        "end": 305,
+        "end": 266,
         "ctxt": 0
       },
       "decorators": [],
@@ -282,14 +282,14 @@
           "type": "ClassProperty",
           "span": {
             "start": 192,
-            "end": 228,
+            "end": 236,
             "ctxt": 0
           },
           "key": {
             "type": "Identifier",
             "span": {
-              "start": 219,
-              "end": 223,
+              "start": 227,
+              "end": 231,
               "ctxt": 0
             },
             "value": "size",
@@ -298,46 +298,8 @@
           "value": {
             "type": "NumericLiteral",
             "span": {
-              "start": 226,
-              "end": 227,
-              "ctxt": 0
-            },
-            "value": 5.0
-          },
-          "typeAnnotation": null,
-          "isStatic": false,
-          "decorators": [],
-          "computed": false,
-          "accessibility": null,
-          "isAbstract": true,
-          "isOptional": false,
-          "isOverride": true,
-          "readonly": true,
-          "declare": false,
-          "definite": false
-        },
-        {
-          "type": "ClassProperty",
-          "span": {
-            "start": 231,
-            "end": 275,
-            "ctxt": 0
-          },
-          "key": {
-            "type": "Identifier",
-            "span": {
-              "start": 266,
-              "end": 270,
-              "ctxt": 0
-            },
-            "value": "size",
-            "optional": false
-          },
-          "value": {
-            "type": "NumericLiteral",
-            "span": {
-              "start": 273,
-              "end": 274,
+              "start": 234,
+              "end": 235,
               "ctxt": 0
             },
             "value": 5.0
@@ -357,15 +319,15 @@
         {
           "type": "ClassMethod",
           "span": {
-            "start": 278,
-            "end": 303,
+            "start": 239,
+            "end": 264,
             "ctxt": 0
           },
           "key": {
             "type": "Identifier",
             "span": {
-              "start": 294,
-              "end": 298,
+              "start": 255,
+              "end": 259,
               "ctxt": 0
             },
             "value": "show",
@@ -375,15 +337,15 @@
             "params": [],
             "decorators": [],
             "span": {
-              "start": 278,
-              "end": 303,
+              "start": 239,
+              "end": 264,
               "ctxt": 0
             },
             "body": {
               "type": "BlockStatement",
               "span": {
-                "start": 301,
-                "end": 303,
+                "start": 262,
+                "end": 264,
                 "ctxt": 0
               },
               "stmts": []