fix: 🐛 syntax error on multiline class constant with comment (#1152)

* fix: 🐛 syntax error on multiline class constant with comment

✅ Closes: #1151

* test: 💍 add test for multiline class constant

* test: 💍 extract doc on test

* test: 💍 fix test case

Author: shufo

src/parser/class.js

@@ -358,7 +358,7 @@ module.exports = {
       this.next();
     }
 
-    if (this.peek() === "=") {
+    if (this.peekSkipComments() === "=") {
       return [false, null];
     }
 
@@ -386,6 +386,21 @@ module.exports = {
     return [nullable, type];
   },
 
+  peekSkipComments: function () {
+    const lexerState = this.lexer.getState();
+    let nextToken;
+
+    do {
+      nextToken = this.lexer.lex();
+    } while (
+      nextToken === this.tok.T_COMMENT ||
+      nextToken === this.tok.T_WHITESPACE
+    );
+
+    this.lexer.setState(lexerState);
+    return nextToken;
+  },
+
   /*
    * reading an interface
    * ```ebnf

test/snapshot/__snapshots__/classconstant.test.js.snap

@@ -49,6 +49,71 @@ Program {
 }
 `;
 
+exports[`classconstant multiline declaration with comment 1`] = `
+Program {
+  "children": [
+    Class {
+      "attrGroups": [],
+      "body": [
+        ClassConstant {
+          "attrGroups": [],
+          "constants": [
+            Constant {
+              "kind": "constant",
+              "name": Identifier {
+                "kind": "identifier",
+                "name": "CONSTANT",
+              },
+              "value": String {
+                "isDoubleQuote": false,
+                "kind": "string",
+                "leadingComments": [
+                  CommentLine {
+                    "kind": "commentline",
+                    "offset": 75,
+                    "value": "// Comment
+",
+                  },
+                ],
+                "raw": "'string'",
+                "unicode": false,
+                "value": "string",
+              },
+            },
+          ],
+          "final": false,
+          "kind": "classconstant",
+          "nullable": false,
+          "type": null,
+          "visibility": "public",
+        },
+      ],
+      "extends": null,
+      "implements": null,
+      "isAbstract": false,
+      "isAnonymous": false,
+      "isFinal": false,
+      "isReadonly": false,
+      "kind": "class",
+      "name": Identifier {
+        "kind": "identifier",
+        "name": "Foo",
+      },
+    },
+  ],
+  "comments": [
+    CommentLine {
+      "kind": "commentline",
+      "offset": 75,
+      "value": "// Comment
+",
+    },
+  ],
+  "errors": [],
+  "kind": "program",
+}
+`;
+
 exports[`classconstant multiple 1`] = `
 Program {
   "children": [

test/snapshot/classconstant.test.js

@@ -75,4 +75,19 @@ describe("classconstant", () => {
       ),
     ).toThrowErrorMatchingSnapshot();
   });
+  it("multiline declaration with comment", () => {
+    expect(
+      parser.parseEval(
+        `class Foo { 
+          public
+          const
+          CONSTANT
+          // Comment
+          =
+          'string';
+        }`,
+        { parser: { version: 803, extractDoc: true } },
+      ),
+    ).toMatchSnapshot();
+  });
 });