[[matchesマクロ]]を使う。
## 例
```rust
#[derive(Debug)]
enum Record {
Data(String),
Comment(String),
}
fn main() {
let records = vec![
Record::Data("one".to_string()),
Record::Data("two".to_string()),
Record::Data("three".to_string()),
Record::Comment("end".to_string()),
];
let results = records
.iter()
.filter(|x| matches!(x, Record::Data(_)))
.collect::<Vec<_>>();
println!("{:?}", results);
// [Data("one"), Data("two"), Data("three")]
}
```
## 参考
- https://stackoverflow.com/questions/25576748/how-to-compare-enum-without-pattern-matching