workaround: fix empty chunk

[stormslowly]

swc_core 升级之前的 workaround
swc 升级完成之后可以 revert。

REF：swc-project/swc#8172

close #899

Summary by CodeRabbit

• 新功能
  • 在Cargo.toml文件中的[dependencies]部分添加了delegate依赖项版本0.12.0。
  • 重命名并重构了Comments结构以使用MakoComments，更新了方法签名，并为MakoComments实现了CommentsTrait。此外，在虚拟位置的纯注释上添加了新的警告消息。
  • 在e2e/fixtures/issue.empty_chunk目录中的新文件expect.js包含了使用Jest的断言，用于检查在某些操作后文件的内容长度是否大于0。
  • mako.config.json文件引入了Mako项目的配置设置，启用了缩小、将模式设置为生产模式、为IE指定目标浏览器版本并禁用devtool。
  • index.tsx文件引入了一个接受参数a的异步函数。

[coderabbitai]

更改摘要

crates/mako/Cargo.toml: ## 简要说明
在`Cargo.toml`文件的`[dependencies]`部分中添加了`delegate`依赖项，版本为`0.12.0`。

## 导出或公共实体声明的更改
- 在`Cargo.toml`中的`[dependencies]`部分添加了`delegate = "0.12.0"`

---

crates/mako/src/ast/comments.rs: ## 简要说明
在`mako`包的`comments.rs`文件中，对`Comments`结构进行了重命名和重构，使用`MakoComments`，更新了方法签名，并为`MakoComments`实现了`CommentsTrait`。此外，在虚拟位置添加了纯注释的新警告消息。

## 导出或公共实体声明的更改
- `use mako_core::swc_common::comments::Comment;` → `use mako_core::swc_common::comments::{Comment, Comments as CommentsTrait};`
- `pub struct Comments(SwcComments);` → `pub struct Comments(MakoComments);`
- `pub fn get_swc_comments(&self) -> &SwcComments {` → `pub fn get_swc_comments(&self) -> &MakoComments {`
- `pub fn add_leading_comment_at(&mut self, pos: BytePos, comment: Comment) {` 更新了实现
- 添加了`pub struct MakoComments(SwcComments);`
- 为`MakoComments`实现了`CommentsTrait`，包括委托方法

---

e2e/fixtures/issue.empty_chunk/expect.js: ## 摘要
在`e2e/fixtures/issue.empty_chunk`目录中的新文件`expect.js`包含使用Jest的断言，检查在某些操作后文件的内容长度是否大于0。

## 导出或公共实体声明的更改
此文件中未对导出或公共实体的声明进行更改。

---

e2e/fixtures/issue.empty_chunk/mako.config.json: ## 摘要
新文件`mako.config.json`为Mako项目引入配置设置，启用了最小化，将模式设置为生产模式，为IE指定了目标浏览器版本，并禁用了devtool。

## 导出或公共实体声明的更改
此文件中未对导出或公共实体的声明进行更改。

---

e2e/fixtures/issue.empty_chunk/src/index.tsx: ## 摘要
新文件`index.tsx`引入了一个接受参数`a`的异步函数。

## 导出或公共实体声明的更改
- 未对导出或公共实体进行更改。


## 漫游

整体变更的高层摘要：包括了添加依赖、重构结构、实现新功能和配置设置等。

## 变更

| 文件                                    | 变更摘要                                                                                   |
|-----------------------------------------|--------------------------------------------------------------------------------------------|
| crates/mako/Cargo.toml                  | 添加`delegate`依赖版本`0.12.0`                                                             |
| crates/mako/src/ast/comments.rs         | 重命名和重构`Comments`结构为`MakoComments`，更新方法签名，实现`CommentsTrait`，添加警告消息        |
| e2e/fixtures/issue.empty_chunk/expect.js | 新文件，包含Jest断言以检查文件内容长度是否大于0                                          |
| e2e/fixtures/issue.empty_chunk/mako.config.json | 新文件，引入Mako项目配置设置，包括启用最小化、设置生产模式、指定目标浏览器版本、禁用devtool |
| e2e/fixtures/issue.empty_chunk/src/index.tsx | 新文件，引入一个接受参数`a`的异步函数                                                 |

诗

兔子编码忙改变，结构重构显新颜。
Jest断言文件内容测，配置设置启新篇。

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[sorrycc]

1、展开点说下原因？为啥注释会导致产物不生成？
2、这么改有啥副作用吗？所有注释相关操作会不生效？

[stormslowly]

1、展开点说下原因？为啥注释会导致产物不生成？ 2、这么改有啥副作用吗？所有注释相关操作会不生效？

1. pure comment 其实就是 #__PURE__ 这样标记无副作用的注释，compress 会依据这个注释决定删不删代码。原先使用 ast 工具方法生成的代码都被打上了 pure，因为 dummy span。
2. 无；只影响 pure comment 在 pos(0)的插入，swc 的实现也是将 0 位置的 pure comment 转移到一个代码不可能触达的 pos 上。