cargo::util::context::value

# Struct FieldVisitor

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    struct FieldVisitor {
        expected: &'static str,
    }

## Fields§

§`expected: &'static str`

## Trait Implementations§

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### impl<'de> Visitor<'de> for FieldVisitor

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#### type Value = ()

The value produced by this visitor.
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#### fn expecting(&self, formatter: &mut Formatter<'_>) -> Result

Format a message stating what data this Visitor expects to receive. Read more
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#### fn visit_str<E>(self, s: &str) -> Result<(), E>
where E: Error,

The input contains a string. The lifetime of the string is ephemeral and it may be destroyed after this method returns. Read more
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#### fn visit_bool<E>(self, v: bool) -> Result<Self::Value, E>
where E: Error,

The input contains a boolean. Read more
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#### fn visit_i8<E>(self, v: i8) -> Result<Self::Value, E>
where E: Error,

The input contains an `i8`. Read more
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#### fn visit_i16<E>(self, v: i16) -> Result<Self::Value, E>
where E: Error,

The input contains an `i16`. Read more
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#### fn visit_i32<E>(self, v: i32) -> Result<Self::Value, E>
where E: Error,

The input contains an `i32`. Read more
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#### fn visit_i64<E>(self, v: i64) -> Result<Self::Value, E>
where E: Error,

The input contains an `i64`. Read more
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#### fn visit_i128<E>(self, v: i128) -> Result<Self::Value, E>
where E: Error,

The input contains a `i128`. Read more
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#### fn visit_u8<E>(self, v: u8) -> Result<Self::Value, E>
where E: Error,

The input contains a `u8`. Read more
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#### fn visit_u16<E>(self, v: u16) -> Result<Self::Value, E>
where E: Error,

The input contains a `u16`. Read more
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#### fn visit_u32<E>(self, v: u32) -> Result<Self::Value, E>
where E: Error,

The input contains a `u32`. Read more
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#### fn visit_u64<E>(self, v: u64) -> Result<Self::Value, E>
where E: Error,

The input contains a `u64`. Read more
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#### fn visit_u128<E>(self, v: u128) -> Result<Self::Value, E>
where E: Error,

The input contains a `u128`. Read more
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#### fn visit_f32<E>(self, v: f32) -> Result<Self::Value, E>
where E: Error,

The input contains an `f32`. Read more
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#### fn visit_f64<E>(self, v: f64) -> Result<Self::Value, E>
where E: Error,

The input contains an `f64`. Read more
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#### fn visit_char<E>(self, v: char) -> Result<Self::Value, E>
where E: Error,

The input contains a `char`. Read more
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#### fn visit_borrowed_str<E>(self, v: &'de str) -> Result<Self::Value, E>
where E: Error,

The input contains a string that lives at least as long as the `Deserializer`. Read more
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#### fn visit_string<E>(self, v: String) -> Result<Self::Value, E>
where E: Error,

The input contains a string and ownership of the string is being given to the `Visitor`. Read more
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#### fn visit_bytes<E>(self, v: &[u8]) -> Result<Self::Value, E>
where E: Error,

The input contains a byte array. The lifetime of the byte array is ephemeral and it may be destroyed after this method returns. Read more
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#### fn visit_borrowed_bytes<E>(self, v: &'de [u8]) -> Result<Self::Value, E>
where E: Error,

The input contains a byte array that lives at least as long as the `Deserializer`. Read more
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#### fn visit_byte_buf<E>(self, v: Vec<u8>) -> Result<Self::Value, E>
where E: Error,

The input contains a byte array and ownership of the byte array is being given to the `Visitor`. Read more
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#### fn visit_none<E>(self) -> Result<Self::Value, E>
where E: Error,

The input contains an optional that is absent. Read more
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#### fn visit_some<D>( self, deserializer: D, ) -> Result<Self::Value, <D as Deserializer<'de>>::Error>
where D: Deserializer<'de>,

The input contains an optional that is present. Read more
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#### fn visit_unit<E>(self) -> Result<Self::Value, E>
where E: Error,

The input contains a unit `()`. Read more
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#### fn visit_newtype_struct<D>( self, deserializer: D, ) -> Result<Self::Value, <D as Deserializer<'de>>::Error>
where D: Deserializer<'de>,

The input contains a newtype struct. Read more
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#### fn visit_seq<A>( self, seq: A, ) -> Result<Self::Value, <A as SeqAccess<'de>>::Error>
where A: SeqAccess<'de>,

The input contains a sequence of elements. Read more
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#### fn visit_map<A>( self, map: A, ) -> Result<Self::Value, <A as MapAccess<'de>>::Error>
where A: MapAccess<'de>,

The input contains a key-value map. Read more
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#### fn visit_enum<A>( self, data: A, ) -> Result<Self::Value, <A as EnumAccess<'de>>::Error>
where A: EnumAccess<'de>,

The input contains an enum. Read more

## Auto Trait Implementations§

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### impl Freeze for FieldVisitor

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### impl RefUnwindSafe for FieldVisitor

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### impl Send for FieldVisitor

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### impl Sync for FieldVisitor

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### impl Unpin for FieldVisitor

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### impl UnwindSafe for FieldVisitor

## 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<'de, T> Expected for T
where T: Visitor<'de>,

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#### fn fmt(&self, formatter: &mut Formatter<'_>) -> Result<(), Error>

Format an explanation of what data was being expected. Same signature as the `Display` and `Debug` traits.
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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> Instrument for T

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#### fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided [`Span`], returning an `Instrumented` wrapper. Read more
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#### fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current `Span`, returning an `Instrumented` wrapper. 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> IntoEither for T

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#### fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts `self` into a `Left` variant of `Either<Self, Self>` if `into_left` is `true`. Converts `self` into a `Right` variant of `Either<Self, Self>` otherwise. Read more
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#### fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts `self` into a `Left` variant of `Either<Self, Self>` if `into_left(&self)` returns `true`. Converts `self` into a `Right` variant of `Either<Self, Self>` otherwise. Read more
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### impl<T> Pointable for T

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#### const ALIGN: usize

The alignment of pointer.
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#### type Init = T

The type for initializers.
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#### unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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#### unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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#### unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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#### unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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### impl<T> Same for T

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#### type Output = T

Should always be `Self`
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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.
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### impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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#### fn vzip(self) -> V

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### impl<T> WithSubscriber for T

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#### fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided `Subscriber` to this type, returning a [`WithDispatch`] wrapper. Read more
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#### fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default `Subscriber` to this type, returning a [`WithDispatch`] wrapper. Read more
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### impl<T> ErasedDestructor for T
where T: 'static,

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### impl<T> MaybeSendSync for T

## Layout§

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain `repr(...)` attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 16 bytes