darling_core::codegen::variant

Struct UnitMatchArm

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pub struct UnitMatchArm<'a>(&'a Variant<'a>);
Expand description

Code generator for an enum variant in a unit match position. This is placed in generated from_string calls for the parent enum. Value-carrying variants wrapped in this type will emit code to produce an “unsupported format” error.

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§0: &'a Variant<'a>

Trait Implementations§

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impl<'a> ToTokens for UnitMatchArm<'a>

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fn to_tokens(&self, tokens: &mut TokenStream)

Write self to the given TokenStream. Read more
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fn to_token_stream(&self) -> TokenStream

Convert self directly into a TokenStream object. Read more
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fn into_token_stream(self) -> TokenStream
where Self: Sized,

Convert self directly into a TokenStream object. Read more

Auto Trait Implementations§

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impl<'a> Freeze for UnitMatchArm<'a>

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impl<'a> RefUnwindSafe for UnitMatchArm<'a>

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impl<'a> !Send for UnitMatchArm<'a>

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impl<'a> !Sync for UnitMatchArm<'a>

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impl<'a> Unpin for UnitMatchArm<'a>

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impl<'a> UnwindSafe for UnitMatchArm<'a>

Blanket Implementations§

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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> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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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> Spanned for T
where T: Spanned + ?Sized,

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fn span(&self) -> Span

Returns a Span covering the complete contents of this syntax tree node, or Span::call_site() if this node is empty.
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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.