Wrong codegen for computed class properties when using TypeScript

[paul-soporan]

Describe the bug

The SWC emit for non-define (aka TypeScript's default) computed class properties is wrong.

Input code

const identifier = 'bar';

class Foo {
  [identifier] = 5;
}

console.log(new Foo().bar)

Config

{
  "jsc": {
    "target": "es2020",
    "parser": {
      "syntax": "typescript"
    }
  }
}

Expected behavior

The emitted JavaScript currently is:

const identifier = 'bar';
class Foo {
    constructor(){
        this.identifier = 5;
    }
}
console.log(new Foo().bar);

I'd expect it to emit:

const identifier = 'bar';
class Foo {
    constructor(){
        this[identifier] = 5;
    }
}
console.log(new Foo().bar);

Version

The version of @swc/core: 1.2.34

Additional context

This doesn't happen when setting the jsc.parser.syntax to ecmascript:

• when targetting es2020 it emits the computed class property as is.
• when targeting lower versions it uses Object.defineProperty which probably goes through a different codepath.

[swc-bot]

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