pub trait VTable:
'static
+ Sized
+ Send
+ Sync
+ Debug {
type Expr: 'static + Send + Sync + Clone + Debug + DisplayAs + PartialEq + Eq + Hash + Deref<Target = dyn VortexExpr> + IntoExpr + AnalysisExpr;
type Encoding: 'static + Send + Sync + Deref<Target = dyn ExprEncoding>;
type Metadata: SerializeMetadata + DeserializeMetadata + Debug;
// Required methods
fn id(encoding: &Self::Encoding) -> ExprId;
fn encoding(expr: &Self::Expr) -> ExprEncodingRef;
fn metadata(expr: &Self::Expr) -> Option<Self::Metadata>;
fn children(expr: &Self::Expr) -> Vec<&ExprRef> ⓘ;
fn with_children(
expr: &Self::Expr,
children: Vec<ExprRef>,
) -> VortexResult<Self::Expr>;
fn build(
encoding: &Self::Encoding,
metadata: &<Self::Metadata as DeserializeMetadata>::Output,
children: Vec<ExprRef>,
) -> VortexResult<Self::Expr>;
fn evaluate(expr: &Self::Expr, scope: &Scope) -> VortexResult<ArrayRef>;
fn return_dtype(expr: &Self::Expr, scope: &DType) -> VortexResult<DType>;
// Provided method
fn operator(
_expr: &Self::Expr,
_children: Vec<OperatorRef>,
) -> Option<OperatorRef> { ... }
}Required Associated Types§
type Expr: 'static + Send + Sync + Clone + Debug + DisplayAs + PartialEq + Eq + Hash + Deref<Target = dyn VortexExpr> + IntoExpr + AnalysisExpr
type Encoding: 'static + Send + Sync + Deref<Target = dyn ExprEncoding>
type Metadata: SerializeMetadata + DeserializeMetadata + Debug
Required Methods§
Sourcefn encoding(expr: &Self::Expr) -> ExprEncodingRef
fn encoding(expr: &Self::Expr) -> ExprEncodingRef
Returns the encoding for the expr.
Sourcefn metadata(expr: &Self::Expr) -> Option<Self::Metadata>
fn metadata(expr: &Self::Expr) -> Option<Self::Metadata>
Returns the serialize-able metadata for the expr, or None if serialization is not
supported.
Sourcefn with_children(
expr: &Self::Expr,
children: Vec<ExprRef>,
) -> VortexResult<Self::Expr>
fn with_children( expr: &Self::Expr, children: Vec<ExprRef>, ) -> VortexResult<Self::Expr>
Return a new instance of the expression with the children replaced.
§Preconditions
The number of children will match the current number of children in the expression.
Sourcefn build(
encoding: &Self::Encoding,
metadata: &<Self::Metadata as DeserializeMetadata>::Output,
children: Vec<ExprRef>,
) -> VortexResult<Self::Expr>
fn build( encoding: &Self::Encoding, metadata: &<Self::Metadata as DeserializeMetadata>::Output, children: Vec<ExprRef>, ) -> VortexResult<Self::Expr>
Construct a new VortexExpr from the provided parts.
Sourcefn evaluate(expr: &Self::Expr, scope: &Scope) -> VortexResult<ArrayRef>
fn evaluate(expr: &Self::Expr, scope: &Scope) -> VortexResult<ArrayRef>
Evaluate the expression in the given scope.
Sourcefn return_dtype(expr: &Self::Expr, scope: &DType) -> VortexResult<DType>
fn return_dtype(expr: &Self::Expr, scope: &DType) -> VortexResult<DType>
Compute the return DType of the expression if evaluated in the given scope.
Provided Methods§
fn operator( _expr: &Self::Expr, _children: Vec<OperatorRef>, ) -> Option<OperatorRef>
Dyn Compatibility§
This trait is not dyn compatible.
In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.