Trait sxd_xpath_visitor::expression::Expression

pub trait Expression: Debug + Downcast {
    pub fn evaluate<'c, 'd>(
        &self, 
        context: &Evaluation<'c, 'd>
    ) -> Result<Value<'d>, Error>;
}

Required methods

pub fn evaluate<'c, 'd>(
    &self,
    context: &Evaluation<'c, 'd>
) -> Result<Value<'d>, Error>

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Implementations

impl dyn Expression

pub fn is<__T: Expression>(&self) -> bool

Returns true if the trait object wraps an object of type __T.

pub fn downcast<__T: Expression>(self: Box<Self>) -> Result<Box<__T>, Box<Self>>

Returns a boxed object from a boxed trait object if the underlying object is of type __T. Returns the original boxed trait if it isn't.

pub fn downcast_rc<__T: Expression>(self: Rc<Self>) -> Result<Rc<__T>, Rc<Self>>

Returns an Rc-ed object from an Rc-ed trait object if the underlying object is of type __T. Returns the original Rc-ed trait if it isn't.

pub fn downcast_ref<__T: Expression>(&self) -> Option<&__T>

Returns a reference to the object within the trait object if it is of type __T, or None if it isn't.

pub fn downcast_mut<__T: Expression>(&mut self) -> Option<&mut __T>

Returns a mutable reference to the object within the trait object if it is of type __T, or None if it isn't.

Implementations on Foreign Types

impl<T: ?Sized> Expression for Box<T> where
    T: Expression, 

pub fn evaluate<'c, 'd>(
    &self,
    context: &Evaluation<'c, 'd>
) -> Result<Value<'d>, Error>

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Implementors

impl Expression for And

pub fn evaluate<'c, 'd>(
    &self,
    context: &Evaluation<'c, 'd>
) -> Result<Value<'d>, Error>

impl Expression for ContextNode

pub fn evaluate<'c, 'd>(
    &self,
    context: &Evaluation<'c, 'd>
) -> Result<Value<'d>, Error>

impl Expression for Equal

pub fn evaluate<'c, 'd>(
    &self,
    context: &Evaluation<'c, 'd>
) -> Result<Value<'d>, Error>

impl Expression for Filter

pub fn evaluate<'c, 'd>(
    &self,
    context: &Evaluation<'c, 'd>
) -> Result<Value<'d>, Error>

impl Expression for Function

pub fn evaluate<'c, 'd>(
    &self,
    context: &Evaluation<'c, 'd>
) -> Result<Value<'d>, Error>

impl Expression for Literal

pub fn evaluate<'c, 'd>(
    &self,
    _: &Evaluation<'c, 'd>
) -> Result<Value<'d>, Error>

impl Expression for Math

pub fn evaluate<'c, 'd>(
    &self,
    context: &Evaluation<'c, 'd>
) -> Result<Value<'d>, Error>

impl Expression for Negation

pub fn evaluate<'c, 'd>(
    &self,
    context: &Evaluation<'c, 'd>
) -> Result<Value<'d>, Error>

impl Expression for NotEqual

pub fn evaluate<'c, 'd>(
    &self,
    context: &Evaluation<'c, 'd>
) -> Result<Value<'d>, Error>

impl Expression for Or

pub fn evaluate<'c, 'd>(
    &self,
    context: &Evaluation<'c, 'd>
) -> Result<Value<'d>, Error>

impl Expression for Path

pub fn evaluate<'c, 'd>(
    &self,
    context: &Evaluation<'c, 'd>
) -> Result<Value<'d>, Error>

impl Expression for Relational

pub fn evaluate<'c, 'd>(
    &self,
    context: &Evaluation<'c, 'd>
) -> Result<Value<'d>, Error>

impl Expression for RootNode

pub fn evaluate<'c, 'd>(
    &self,
    context: &Evaluation<'c, 'd>
) -> Result<Value<'d>, Error>

impl Expression for Union

pub fn evaluate<'c, 'd>(
    &self,
    context: &Evaluation<'c, 'd>
) -> Result<Value<'d>, Error>

impl Expression for Variable

pub fn evaluate<'c, 'd>(
    &self,
    context: &Evaluation<'c, 'd>
) -> Result<Value<'d>, Error>

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