oni_comb_parser_rs/extension/parser/conversion_parser.rs
use crate::extension::parser::OperatorParser;
use std::fmt::Debug;
pub trait ConversionParser<'a>: OperatorParser<'a> {
fn map_res<B, E, F>(self, f: F) -> Self::P<'a, Self::Input, B>
where
F: Fn(Self::Output) -> Result<B, E> + 'a,
E: Debug,
Self::Output: Debug + 'a,
B: Debug + 'a;
}