[−][src]Struct scones_examples::OptionalBuilder
A builder which creates an instance of OptionalBuilt
.
Use OptionalBuilder::new()
to start the builder. Calling build()
consumes the builder, returning the completed item. Before calling build()
, you can modify values the builder will use by calling any of the other functions. For this builder, you must call all of the following functions at least once before calling build()
, or you will receive a compilation error:
required(value: i32)
Here is a minimal example:
let instance = OptionalBuilder::new()
.required(value).build();
An example of how to use this builder is as follows:
ⓘThis example is not tested
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);
Implementations
impl OptionalBuilder<Missing>
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impl<RequiredStatus__> OptionalBuilder<RequiredStatus__>
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pub fn optional(self, value: f32) -> Self
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pub fn required(self, value: i32) -> OptionalBuilder<Present>
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impl OptionalBuilder<Present>
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pub fn build(self) -> OptionalBuilt
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Auto Trait Implementations
impl<RequiredStatus__> RefUnwindSafe for OptionalBuilder<RequiredStatus__> where
RequiredStatus__: RefUnwindSafe,
RequiredStatus__: RefUnwindSafe,
impl<RequiredStatus__> Send for OptionalBuilder<RequiredStatus__> where
RequiredStatus__: Send,
RequiredStatus__: Send,
impl<RequiredStatus__> Sync for OptionalBuilder<RequiredStatus__> where
RequiredStatus__: Sync,
RequiredStatus__: Sync,
impl<RequiredStatus__> Unpin for OptionalBuilder<RequiredStatus__> where
RequiredStatus__: Unpin,
RequiredStatus__: Unpin,
impl<RequiredStatus__> UnwindSafe for OptionalBuilder<RequiredStatus__> where
RequiredStatus__: UnwindSafe,
RequiredStatus__: UnwindSafe,
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>,