Define ParseError as a dataclass

pgtoolkit/errors.py

@@ -1,15 +1,13 @@
 from __future__ import annotations
 
+from dataclasses import dataclass
 
+
+@dataclass
 class ParseError(Exception):
-    def __init__(self, lineno: int, line: str, message: str) -> None:
-        self.message = message
-        super().__init__(self.message)
-        self.lineno = lineno
-        self.line = line
-
-    def __repr__(self) -> str:
-        return f"<{self.__class__.__name__} at line {self.lineno}: {self.message:.32}>"
+    lineno: int
+    line: str
+    message: str
 
     def __str__(self) -> str:
         return f"Bad line #{self.lineno} '{self.line.strip():.32}': {self.message}"