use crate::{errors::ErrorKind, TextSpan, TokenPair, TokenTree, YggdrasilError, YggdrasilRule};
use alloc::format;
use core::{fmt::Debug, ops::Range};
pub trait YggdrasilNode: Clone + Debug {
type Rule: YggdrasilRule;
fn get_rule<R>(&self) -> Option<Self::Rule> {
None
}
fn get_range(&self) -> Option<Range<usize>> {
None
}
fn from_cst(mut tree: TokenTree<Self::Rule>) -> Result<Self, YggdrasilError<Self::Rule>> {
match tree.next() {
Some(s) => Self::from_pair(s),
None => Err(YggdrasilError::new_from_span(
ErrorKind::CustomError { message: format!("no child: {}", tree.as_str()) },
TextSpan { input: "", start: 0, end: 0 },
)),
}
}
fn from_pair(pair: TokenPair<Self::Rule>) -> Result<Self, YggdrasilError<Self::Rule>> {
Err(YggdrasilError::new_from_span(
ErrorKind::CustomError { message: format!("unimplemented {:?}", pair) },
TextSpan { input: "", start: 0, end: 0 },
))
}
}