small_iter_fields 0.1.3

Derive an iterator over the fields of a struct
Documentation 
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# small_iter_fields

This crate adds ```#[derive(IterFields)]``` and ```#[derive(LenFields)]```.<br>

It works for:
* Enums

## Known Limitations

* Enum variants must have no data 

## Example 


```rust
use std::collections::HashMap;
use small_iter_fields::{IterFields, LenFields};
 
#[derive(IterFields, LenFields, Hash, PartialEq, Eq)]

enum Stage {
  Start,
  Middle,
  End,
}

let mut map: HashMap<Stage, Vec<i32>> = HashMap::with_capacity(Stage::len());
assert!(map.capacity() >= 3);

for stage in Stage::iter_fields() {
  map.insert(stage, Vec::new());
};
 
assert!(map.contains_key(&Stage::Start));
assert!(map.contains_key(&Stage::Middle));
assert!(map.contains_key(&Stage::End));
```

## License

MIT or Apache-2.0