ColumnsVisitor

Struct ColumnsVisitor

pub struct ColumnsVisitor;

Expand description

A visitor to collect column

Trait Implementations§

impl Clone for ColumnsVisitor

fn clone(&self) -> ColumnsVisitor

Returns a duplicate of the value. Read more

1.0.0 · Source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more

impl Debug for ColumnsVisitor

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

Formats the value using the given formatter. Read more

impl<'a> Visitor<'a, Vec<&'a Identifier>> for ColumnsVisitor

fn column(&self, column: &'a Column) -> Vec<&'a Column> ⓘ

fn value(&self, _value: &'a Value) -> Vec<&'a Column> ⓘ

fn function( &self, _function: &'a Function, arguments: Vec<Vec<&'a Column>>, ) -> Vec<&'a Column> ⓘ

fn aggregate( &self, _aggregate: &'a Aggregate, argument: Vec<&'a Column>, ) -> Vec<&'a Column> ⓘ

fn structured( &self, fields: Vec<(Identifier, Vec<&'a Column>)>, ) -> Vec<&'a Column> ⓘ

Auto Trait Implementations§

impl Freeze for ColumnsVisitor

impl RefUnwindSafe for ColumnsVisitor

impl Send for ColumnsVisitor

impl Sync for ColumnsVisitor

impl Unpin for ColumnsVisitor

impl UnwindSafe for ColumnsVisitor

Blanket Implementations§

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

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

impl<T> Borrow<T> for T
where T: ?Sized,

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T
where T: ?Sized,

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

Mutably borrows from an owned value. Read more

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

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

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

Performs copy-assignment from self to dest. Read more

impl<T> From<T> for T

fn from(t: T) -> T

Returns the argument unchanged.

impl<T, U> Into<U> for T
where U: From<T>,

fn into(self) -> U

Calls U::from(self).

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

impl<T> IntoEither for T

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

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

impl<T> Same for T

type Output = T

Should always be Self

impl<SS, SP> SupersetOf<SS> for SP
where SS: SubsetOf<SP>,

fn to_subset(&self) -> Option<SS>

The inverse inclusion map: attempts to construct self from the equivalent element of its superset. Read more

fn is_in_subset(&self) -> bool

Checks if self is actually part of its subset T (and can be converted to it).

fn to_subset_unchecked(&self) -> SS

Use with care! Same as self.to_subset but without any property checks. Always succeeds.

fn from_subset(element: &SS) -> SP

The inclusion map: converts self to the equivalent element of its superset.

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

type Owned = T

The resulting type after obtaining ownership.

fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more

fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more

impl<T, U> TryFrom<U> for T
where U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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

The type returned in the event of a conversion error.

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.

impl<V, T> VZip<V> for T
where V: MultiLane<T>,

fn vzip(self) -> V

impl<'a, T, V> Visitor<'a, Expr, T> for V
where T: Clone, V: Visitor<'a, T>,

fn visit(&self, acceptor: &'a Expr, dependencies: Visited<'a, Expr, T>) -> T

A function called on each node of a structured object with its dependencies already visited

fn dependencies(&self, acceptor: &'a A) -> Dependencies<'a, A>

Describe the dependencies of the acceptor The dependencies can be customized