[−][src]Struct scones_examples::OptionalBuilt
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
Auto Trait Implementations
impl RefUnwindSafe for OptionalBuilt
impl Send for OptionalBuilt
impl Sync for OptionalBuilt
impl Unpin for OptionalBuilt
impl UnwindSafe for OptionalBuilt
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
pub fn borrow_mut(&mut self) -> &mut T
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impl<T> From<T> for T
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,