Enum Expression 

pub enum Expression {
    Binary(Box<Expression>, BinaryOperator, Box<Expression>),
    Negate(Box<Expression>),
    Path(PathExpression),
    LocationStep(LocationStepExpression),
    Filter(FilterExpression),
    Literal(Literal),
    Variable(QName),
    ContextItem,
    Function(CoreFunction),
}

Variants

Binary(Box<Expression>, BinaryOperator, Box<Expression>)

Negate(Box<Expression>)

Path(PathExpression)

LocationStep(LocationStepExpression)

https://www.w3.org/TR/1999/REC-xpath-19991116/#section-Location-Steps

Filter(FilterExpression)

Literal(Literal)

Variable(QName)

ContextItem

Function(CoreFunction)

We only support the built-in core functions.

Implementations

impl Expression

pub(crate) fn evaluate<D: Dom>( &self, context: &EvaluationCtx<D>, ) -> Result<Value<D::Node>, Error>

Trait Implementations

impl Clone for Expression

fn clone(&self) -> Expression

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Expression

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

Formats the value using the given formatter.

impl MallocSizeOf for Expression

fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize

Measure the heap usage of all descendant heap-allocated structures, but not the space taken up by the value itself.

impl PartialEq for Expression

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for Expression