Struct TypedDataframeField

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pub struct TypedDataframeField {
    pub attrs: Vec<Attribute>,
    pub name: Ident,
    pub elem_ty: Type,
    pub optional: bool,
}

Expand description

A single column declaration.

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§attrs: Vec<Attribute>

Field attributes (doc comments etc.).

§name: Ident

Column name (as used in R names(df)).

§elem_ty: Type

Element type (e.g. i32, f64).

§optional: bool

True if the field was declared Option<T> (column may be absent).

Trait Implementations§

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impl Parse for TypedDataframeField

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fn parse(input: ParseStream<'_>) -> Result<Self>

Auto Trait Implementations§

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impl UnwindSafe for TypedDataframeField

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 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> SizeHint for T
where T: ?Sized,

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default fn lower_bound(&self) -> usize

🔬This is a nightly-only experimental API. (core_io_internals)

Returns a lower bound on the number of elements this container-like item contains. For example, an array [u8; 12] could return any value between 0 and 12 inclusively as a correct implementation. Read more

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default fn upper_bound(&self) -> Option<usize>

🔬This is a nightly-only experimental API. (core_io_internals)

Returns an upper bound on the number of elements this container-like item contains if it can be determined, otherwise None. Read more

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final fn size_hint(&self) -> (usize, Option<usize>)

🔬This is a nightly-only experimental API. (core_io_internals)

Returns an estimate for the number of elements this container like type contains. Read more

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