Struct OptionalBuilt

pub struct OptionalBuilt {
    pub required: i32,
    pub constructed_from_optional: i32,
}

An example showing how to add optional fields to a builder.

It is defined as follows:

#[make_builder(pub OptionalBuilder(optional: f32))]
/// ^ An example of how to use this builder is as follows:
/// ^ ```
/// ^ let instance = OptionalBuilder::new().required(12).build();
/// ^ assert_eq!(instance.constructed_from_optional, 0);
/// ^ let instance = OptionalBuilder::new().required(12).optional(5.0).build();
/// ^ assert_eq!(instance.constructed_from_optional, 5);
/// ^ let instance = OptionalBuilder::new().optional(12.0).required(5).build();
/// ^ assert_eq!(instance.constructed_from_optional, 12);
/// ^ ```
pub struct OptionalBuilt {
    pub required: i32,
    #[value(optional as i32)]
    pub constructed_from_optional: i32,
}

Note that you must use the literal text Option and not use a type alias. The macro will automatically change this to use ::std::option::Option.

Fields

required: i32

constructed_from_optional: i32