Enum Pattern 

pub enum Pattern<N: Node> {
    Predicate(Transform<N>),
    Selection(Path),
    Error(Error),
}

An XPath pattern. A pattern most frequently appears as the value of a match attribute. A pattern is either a predicate pattern or a selection pattern.

A predicate pattern matches the current item if all of the predicates evaluate to true.

A selection pattern is subset of XPath path expressions.

Variants

Predicate(Transform<N>)

Selection(Path)

Error(Error)

Implementations

impl<N: Node> Pattern<N>

pub fn is_err(&self) -> bool

Returns whether the Pattern is of type error.

pub fn get_err(&self) -> Option<Error>

pub fn matches<F: FnMut(&str) -> Result<(), Error>, G: FnMut(&str) -> Result<N, Error>, H: FnMut(&Url) -> Result<String, Error>>( &self, ctxt: &Context<N>, stctxt: &mut StaticContext<N, F, G, H>, i: &Item<N>, ) -> bool

Returns whether the given item matches the pattern. TODO: return dynamic errors

pub fn terminal_node_test(&self) -> (Axis, Axis, NodeTest)

Find the NodeTest for the terminal step

Trait Implementations

impl<N: Clone + Node> Clone for Pattern<N>

fn clone(&self) -> Pattern<N>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<N: Node> Debug for Pattern<N>

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

Formats the value using the given formatter.

impl<N: Node> TryFrom<&str> for Pattern<N>

Compile an XPath pattern.

type Error = Error

The type returned in the event of a conversion error.

fn try_from(e: &str) -> Result<Self, <Pattern<N> as TryFrom<&str>>::Error>

Performs the conversion.

impl<N: Node> TryFrom<(&str, N)> for Pattern<N>

Compile an XPath pattern. Uses the supplied Node to resolve in-scope XML Namespaces.

type Error = Error

The type returned in the event of a conversion error.

fn try_from(e: (&str, N)) -> Result<Self, <Pattern<N> as TryFrom<&str>>::Error>

Performs the conversion.

impl<'a, N: Node> TryFrom<(String, N)> for Pattern<N>

type Error = Error

The type returned in the event of a conversion error.

fn try_from( e: (String, N), ) -> Result<Self, <Pattern<N> as TryFrom<(&'a str, N)>>::Error>

Performs the conversion.

impl<'a, N: Node> TryFrom<String> for Pattern<N>

type Error = Error

The type returned in the event of a conversion error.

fn try_from(e: String) -> Result<Self, <Pattern<N> as TryFrom<&'a str>>::Error>

Performs the conversion.