Struct sise::AtomNodeReadUtil

pub struct AtomNodeReadUtil<'a> { /* private fields */ }

Utility to read atom nodes.

Implementations

impl<'a> AtomNodeReadUtil<'a>

pub fn new(atom: &'a str, pos: Option<Pos>) -> Self

pub fn atom(&self) -> &'a str

Returns the atom value in this utility.

pub fn pos(&self) -> Option<Pos>

Returns the position of the atom in this utility.

pub fn decode<T, F>(&self, f: F, value_type: &str) -> Result<T, ReadUtilError>where
    F: FnOnce(&str) -> Option<T>,

Decodes the atom using an user-provided function.

The function shall return None if the decodification fails. In such case, ReadError::InvalidValue will be returned, with the value of value_type.

Example

use sise::sise_expr;

let node = sise_expr!("example");
let node_read_util = sise::NodeReadUtil::new(&node, None);
let atom_read_util = node_read_util.as_atom().unwrap();
let decoded = atom_read_util.decode(|atom| Some(atom.len()), "decode_as_atom").unwrap();
assert_eq!(decoded, 7);

Trait Implementations

impl<'a> Clone for AtomNodeReadUtil<'a>

fn clone(&self) -> AtomNodeReadUtil<'a>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'a> Debug for AtomNodeReadUtil<'a>

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

Formats the value using the given formatter.