Merge pull request #23 from gma2th/master

Implement Error trait for ParseError

src/lib.rs

@@ -90,6 +90,8 @@ use rust_decimal::Decimal;
 use rust_decimal::Error as DecimalError;
 use std::cmp::min;
 use std::collections::HashMap;
+use std::error::Error;
+use std::fmt;
 use std::num::ParseIntError;
 use std::str::FromStr;
 use std::vec::Vec;
@@ -146,6 +148,14 @@ pub enum ParseError {
     YearMonthDayError(&'static str),
 }
 
+impl fmt::Display for ParseError {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "{:?}", self)
+    }
+}
+
+impl Error for ParseError {}
+
 type ParseResult<I> = Result<I, ParseError>;
 
 pub(crate) fn tokenize(parse_string: &str) -> Vec<String> {