Enum Expr 

pub enum Expr {
    Path {
        absolute: bool,
        steps: Vec<Step>,
    },
    Literal(String),
    Number(f64),
    Binary {
        op: BinaryOp,
        lhs: Box<Expr>,
        rhs: Box<Expr>,
    },
    Function {
        name: String,
        args: Vec<Expr>,
    },
    Negate(Box<Expr>),
}

Available on crate feature xpath only.

An XPath expression.

Variants

Path

A location path. absolute means it started with /.

Fields

absolute: bool

Whether the path starts at the document root.

steps: Vec<Step>

The steps, in order.

Literal(String)

A literal string.

Number(f64)

A literal number.

Binary

A binary operation.

Fields

op: BinaryOp

The operator.

lhs: Box<Expr>

Left operand.

rhs: Box<Expr>

Right operand.

Function

A function call.

Fields

name: String

The function’s name.

args: Vec<Expr>

Its arguments.

Negate(Box<Expr>)

Unary negation.

Trait Implementations

impl Clone for Expr

fn clone(&self) -> Expr

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Expr

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

Formats the value using the given formatter.

impl PartialEq for Expr

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Expr