Various transform bugs with the JavaScript decorators proposal

[evanw]

Describe the bug

I'm writing tests for the JavaScript decorators proposal as part of esbuild's implementation: https://github.com/evanw/decorator-tests. This issue is mainly to let you know about the tests, which you may find useful. There are over 200 test failures so I'm not going to list them all out here. In certain cases, SWC generates code with syntax errors when transforming code containing JavaScript decorators. These syntax error bugs are reported below. There are also many behavioral bugs that are not reported here but that can be found in the test suite.

Input code

// SWC turns this into code with a syntax error
class Foo {
    accessor foo;
    static accessor foo;
}

// SWC turns this into code with a syntax error
@dec class Bar extends (await Bar) {
    @dec static field;
}

// SWC fails to transform this decorator at all
class Baz {
    accessor foo = @dec class {}
}

Config

{
  "jsc": {
    "target": "es2022",
    "parser": {
      "syntax": "typescript",
      "decorators": true
    },
    "transform": {
      "decoratorVersion": "2022-03"
    }
  }
}

Playground link (or link to the minimal reproduction)

https://play.swc.rs/?version=1.5.4&code=H4sIAAAAAAAAA5WPTQrCQAxG93OKb6mrHkAEUfACLlyH6ZQOjBNIIq2W3t2xrVDEjVl%2B%2BXkvVYXL9QS7S1ZYGxUxG8NzHdBFa0HQRzbqEURYnE%2BkijMzBodS5H1QZUHDvJsSNbLovxqjc9WfpEMdPGbckQSht5BrxYY6ivaOtovCNLhQmxhSvcY1FFPBMUwoa8Nym9llh4Ws%2BJGBUnIf0vPHY9hjZTOM5f4LT6dv4DgBAAA%3D&config=H4sIAAAAAAAAA02OsQrDMAxE93yF0ZxCcLd8SHfhqiGF2uakQkPIv1duQuggkO7eHVq7EOipicaw%2BuqHMSYxv0k0DjFSv%2BuVoYKTc0WXbPxppC1VNGGudtDu3iUVsBWoE4a3%2FIztaDNw1kfB67%2FwjNwEOpfcqtsLl%2BFKe7prs30BOXCfLbUAAAA%3D

SWC Info output

No response

Expected behavior

When given valid JavaScript code as input, SWC should never generate code containing syntax errors.

Actual behavior

No response

Version

1.5.4 (the latest on the playground)

Additional context

No response