Struct Args 

pub struct Args<'d>(pub Vec<Value<'d>>);

Provides common utility functions for dealing with function argument lists.

Tuple Fields

0: Vec<Value<'d>>

Implementations

impl<'d> Args<'d>

pub fn len(&self) -> usize

pub fn is_empty(&self) -> bool

pub fn at_least(&self, minimum: usize) -> Result<(), Error>

Ensures that there are at least the requested number of arguments.

pub fn at_most(&self, maximum: usize) -> Result<(), Error>

Ensures that there are no more than the requested number of arguments.

pub fn exactly(&self, expected: usize) -> Result<(), Error>

Ensures that there are exactly the requested number of arguments.

pub fn pop_boolean(&mut self) -> Result<bool, Error>

Removes the last argument and ensures it is a boolean. If the argument is not a boolean, it is converted to one.

pub fn pop_number(&mut self) -> Result<f64, Error>

Removes the last argument and ensures it is a number. If the argument is not a number, it is converted to one.

pub fn pop_string(&mut self) -> Result<String, Error>

Removes the last argument and ensures it is a string. If the argument is not a string, it is converted to one.

pub fn pop_nodeset(&mut self) -> Result<Nodeset<'d>, Error>

Removes the last argument and ensures it is a nodeset. If the argument is not a nodeset, a type mismatch error is returned.

Trait Implementations

impl<'d> Index<usize> for Args<'d>

type Output = Value<'d>

The returned type after indexing.

fn index(&self, index: usize) -> &Value<'d>

Performs the indexing (container[index]) operation.