attribute_derive::from_partial

Struct Defaulting

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pub struct Defaulting<T>(pub T);
Expand description

FromPartial wrapper that uses Default value when not specified.

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§0: T

Trait Implementations§

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impl<T: Clone> Clone for Defaulting<T>

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fn clone(&self) -> Defaulting<T>

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more

Auto Trait Implementations§

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impl<T> Freeze for Defaulting<T>
where T: Freeze,

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impl<T> RefUnwindSafe for Defaulting<T>
where T: RefUnwindSafe,

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impl<T> Send for Defaulting<T>
where T: Send,

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impl<T> Sync for Defaulting<T>
where T: Sync,

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impl<T> Unpin for Defaulting<T>
where T: Unpin,

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impl<T> UnwindSafe for Defaulting<T>
where T: UnwindSafe,

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dst: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<P, T> FromPartial<Defaulting<P>> for T
where T: Default + FromPartial<P>,

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fn from(partial: Defaulting<P>) -> Result<T, Error>

Creates Self from T. Read more
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fn from_option(partial: Option<Defaulting<P>>, _error: &str) -> Result<T, Error>

Creates Self from optional T. Read more
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fn join( first: Option<SpannedValue<T>>, second: SpannedValue<T>, specified_twice_error: &str, ) -> Result<Option<SpannedValue<T>>>

Defines how two arguments for the same parameter should be handled. Read more
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impl<T> FromPartial<T> for T

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fn from(partial: T) -> Result<T, Error>

Creates Self from T. Read more
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fn from_option(partial: Option<T>, error_missing: &str) -> Result<Self>

Creates Self from optional T. Read more
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fn join( first: Option<SpannedValue<T>>, second: SpannedValue<T>, specified_twice_error: &str, ) -> Result<Option<SpannedValue<T>>>

Defines how two arguments for the same parameter should be handled. Read more
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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.