# wopt (with-options)
## Description
A procedural macro that automatically generates an Option-wrapped version of a struct, reducing boilerplate for optional updates.
## Example
```rust
use wopt::*;
#[derive(WithOpt)]
#[wopt(derive(Debug, Default, PartialEq))]
struct Example {
a: u8,
#[wopt(required)]
b: f32,
c: String,
}
fn main() {
let b = 420.0;
let mut ex_opt = ExampleOpt::default();
ex_opt.b = b;
assert_eq!(
ex_opt,
ExampleOpt {
a: None,
b,
c: None
},
)
}
```
## Field Attributes
| `required` | Does not wrap the specified field with an `Option`. |
| `skip` | Does not include the specified field. |
## Optional Features
| [rkyv](https://crates.io/crates/bitflags) | Serialize/Deserialize using `rkyv`. |
| [serde](https://crates.io/crates/serde) | Seriailze/Deserialize using `serde`. |
## Additional Notes
The automatically generated optional-struct does not come with any trait/derivation implementations. The fields are publicized, however, it may be helpful to specify the `Default` trait:
```rust
#[derive(WithOpt)]
#[wopt(derive(Default))] // attempts to implement `Default`
struct ExampleWithDefault(u8);
```