Struct sise::NodeReadUtil

pub struct NodeReadUtil<'a, 'b> { /* private fields */ }

Utility to read nodes.

See as_atom and as_list methods.

Implementations

impl<'a, 'b> NodeReadUtil<'a, 'b>

pub fn new(node: &'a Node, pos_tree: Option<&'b PosTree>) -> Self

pub fn node(&self) -> &'a Node

Returns the node in this utility.

pub fn pos_tree(&self) -> Option<&'b PosTree>

Returns the position tree of the node in this utility.

pub fn as_atom(&self) -> Result<AtomNodeReadUtil<'a>, ReadUtilError>

If the node is an atom, returns a AtomNodeReadUtil with such atom. Otherwise, it returns a ReadError::ExpectedAtom error.

Example

use sise::sise_expr;

let node = sise_expr!("example");
let node_read_util = sise::NodeReadUtil::new(&node, None);
assert_eq!(node_read_util.as_atom().unwrap().atom(), "example");

pub fn as_list(&self) -> Result<ListNodeReadUtil<'a, 'b>, ReadUtilError>

If the node is a list, returns a ListNodeReadUtil with such list. Otherwise, it returns a ReadError::ExpectedList error.

Example

use sise::sise_expr;

let node = sise_expr!(["example"]);
let node_read_util = sise::NodeReadUtil::new(&node, None);
assert_eq!(node_read_util.as_list().unwrap().list(), [sise_expr!("example")]);

Trait Implementations

impl<'a, 'b> Clone for NodeReadUtil<'a, 'b>

fn clone(&self) -> NodeReadUtil<'a, 'b>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'a, 'b> Debug for NodeReadUtil<'a, 'b>

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

Formats the value using the given formatter.