Implement std::error::Error for ParserError

Author: benesch

src/sqlparser.rs

@@ -20,6 +20,7 @@ use super::dialect::keywords;
 use super::dialect::Dialect;
 use super::sqlast::*;
 use super::sqltokenizer::*;
+use std::error::Error;
 
 #[derive(Debug, Clone, PartialEq)]
 pub enum ParserError {
@@ -47,6 +48,17 @@ impl From<TokenizerError> for ParserError {
     }
 }
 
+impl std::fmt::Display for ParserError {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        write!(f, "sql parser error: {}", match self {
+            ParserError::TokenizerError(s) => s,
+            ParserError::ParserError(s) => s,
+        })
+    }
+}
+
+impl Error for ParserError {}
+
 /// SQL Parser
 pub struct Parser {
     tokens: Vec<Token>,