Struct tc_btree::Column

source · [−]

pub struct Column {
    pub name: Id,
    pub dtype: ValueType,
    pub max_len: Option<usize>,
}

Expand description

A Column used in the schema of a BTree.

Fields

name: Iddtype: ValueTypemax_len: Option<usize>

Implementations

impl Column

pub fn name(&self) -> &Id

Get the name of this column.

pub fn dtype(&self) -> ValueType

Get the Class of this column.

pub fn max_len(&self) -> &Option<usize>

Get the maximum size (in bytes) of this column.

Trait Implementations

impl Clone for Column

fn clone(&self) -> Column

Returns a copy 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 Column

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

Formats the value using the given formatter. Read more

impl Display for Column

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

Formats the value using the given formatter. Read more

impl<'a> From<&'a Column> for (&'a Id, ValueType )

fn from(col: &'a Column) -> (&'a Id, ValueType )

Converts to this type from the input type.

impl<I: Into<Id>> From<(I, NumberType)> for Column

fn from(column: (I, NumberType)) -> Column

Converts to this type from the input type.

impl From<(Id, ValueType, usize )> for Column

fn from(column: (Id, ValueType, usize )) -> Column

Converts to this type from the input type.

impl From<(Id, ValueType )> for Column

fn from(column: (Id, ValueType )) -> Column

Converts to this type from the input type.

impl From<Column> for Value

fn from(column: Column) -> Self

Converts to this type from the input type.

impl FromStream for Column

type Context = ()

The decoding context of this type, useful in situations where the stream to be decoded may be too large to hold in main memory. Read more

fn from_stream<'life0, 'async_trait, D>(
    __arg0: (),
    decoder: &'life0 mut D
) -> Pin<Box<dyn Future<Output = Result<Self, D::Error>> + Send + 'async_trait>> where
    D: 'async_trait + Decoder,
    'life0: 'async_trait,
    Self: 'async_trait,

Parse this value using the given Decoder.

impl<'en> IntoStream<'en> for Column

fn into_stream<E: Encoder<'en>>(self, encoder: E) -> Result<E::Ok, E::Error>

Take ownership of this value and serialize it into the given encoder.

impl PartialEq<Column> for Column

fn eq(&self, other: &Column) -> bool

This method tests for self and other values to be equal, and is used by ==. Read more

fn ne(&self, other: &Column) -> bool

This method tests for !=.

impl TryCastFrom<Value> for Column

fn can_cast_from(value: &Value) -> bool

Test if value can be cast into Self.

fn opt_cast_from(value: Value) -> Option<Column>

Returns Some(Self) if the source value can be cast into Self, otherwise None.

fn try_cast_from<Err, OnErr>(value: T, on_err: OnErr) -> Result<Self, Err> where
OnErr: FnOnce(&T) -> Err,

Returns Ok(Self) if the source value can be cast into Self, otherwise calls on_err.

impl Eq for Column

impl StructuralEq for Column

impl StructuralPartialEq for Column

Auto Trait Implementations

impl RefUnwindSafe for Column

impl Send for Column

impl Sync for Column

impl Unpin for Column

impl UnwindSafe for Column

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,

const: unstable · source

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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

const: unstable · source

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

Mutably borrows from an owned value. Read more

impl<F, T> CastFrom<F> for T where
T: From<F>,

fn cast_from(f: F) -> T

Cast an instance of T into an instance of Self.

impl<T, F> CastInto<F> for T where
F: CastFrom<T>,

fn cast_into(self) -> F

Cast an instance of Self into an instance of T.

impl<T> From<T> for T

const: unstable · source

fn from(t: T) -> T

Returns the argument unchanged.

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

const: unstable · source

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<F> Match for F

fn matches<T>(&self) -> bool where
T: TryCastFrom<Self>,

Returns true if self can be cast into the target type T.

impl<T> Same<T> for T

type Output = T

Should always be Self

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)

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

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

impl<T> ToString for T where
T: Display + ?Sized,

default fn to_string(&self) -> String

Converts the given value to a String. Read more

impl<F, T> TryCastFrom<F> for T where
T: CastFrom<F>,

fn can_cast_from(&F) -> bool

Test if value can be cast into Self.

fn opt_cast_from(f: F) -> Option<T>

Returns Some(Self) if the source value can be cast into Self, otherwise None.

fn try_cast_from<Err, OnErr>(value: T, on_err: OnErr) -> Result<Self, Err> where
OnErr: FnOnce(&T) -> Err,

Returns Ok(Self) if the source value can be cast into Self, otherwise calls on_err.

impl<F, T> TryCastInto<T> for F where
T: TryCastFrom<F>,

fn can_cast_into(&self) -> bool

Test if self can be cast into T.

fn opt_cast_into(self) -> Option<T>

Returns Some(T) if self can be cast into T, otherwise None.

fn try_cast_into<Err, OnErr>(self, on_err: OnErr) -> Result<T, Err> where
OnErr: FnOnce(&Self) -> Err,

Returns Ok(T) if self can be cast into T, otherwise calls on_err.

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

type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

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.

const: unstable · source

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