1 files changed, 21 insertions, 0 deletions
diff --git a/parser/src/pair_ext_parse.rs b/parser/src/pair_ext_parse.rs
new file mode 100644
index 0000000..a04b3dd
--- /dev/null
+++ b/parser/src/pair_ext_parse.rs
@@ -0,0 +1,21 @@
+use std::str::FromStr;
+
+use pest::Span;
+use pest::iterators::Pair;
+use pest::error::{Error,ErrorVariant};
+
+
+pub trait PairExt<R> where R: pest::RuleType {
+	fn parse<T, E>(&self) -> Result<T, 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, 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) -> Error<R> where E: ToString, R: pest::RuleType {
+	let var: ErrorVariant<R> = ErrorVariant::CustomError { message: e.to_string() };
+	Error::new_from_span(var, span)
+}