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use std::str::FromStr;
use pest::error::{Error, ErrorVariant};
use pest::iterators::Pair;
use pest::Span;
pub trait PairExt<R>
where
R: pest::RuleType,
{
fn parse<T, E>(&self) -> Result<T, Box<Error<R>>>
where
T: FromStr<Err = E>,
E: ToString;
}
impl<'l, R> PairExt<R> for Pair<'l, R>
where
R: pest::RuleType,
{
fn parse<T, E>(&self) -> Result<T, Box<Error<R>>>
where
T: FromStr<Err = E>,
E: ToString,
{
self.as_str()
.parse()
.map_err(|e| to_parse_error(self.as_span(), &e))
}
}
pub(crate) fn to_parse_error<E, R>(span: Span, e: &E) -> Box<Error<R>>
where
E: ToString,
R: pest::RuleType,
{
let var: ErrorVariant<R> = ErrorVariant::CustomError {
message: e.to_string(),
};
Box::new(Error::new_from_span(var, span))
}
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