# About tiaojian-macro

**tiaojian-macro** 是使用过程宏进行条件编译的工具包，目前实现了项目中已激活的 package 的检测。

## Example

```rust
#![feature(proc_macro_hygiene)]

use tiaojian_macro::tiaojian;

fn main() {
    #[tiaojian(is_active("sqlx", "sqlx-mysql"))]
    println!("sqlx and sqlx-mysql are actived");

    #[tiaojian(is_active("sqlx", "sqlx-sqlite"))]
    println!("sqlx and sqlx-sqlite are actived");
}
```