feat(exception): 增加语法错误基类

1 files changed, 12 insertions, 0 deletions

diff --git a/src/psi/exception.py b/src/psi/exception.py
index 838d72b..a8b7201 100644
--- a/src/psi/exception.py
+++ b/src/psi/exception.py
@@ -22,3 +22,15 @@ class ValueError(PsiException):
         raise ValueError("Invalid value encountered in the Psi code.")
         ```
     """
+
+class GrammarError(PsiException):
+    """
+    An exception class for grammar-related errors in Psi code.
+
+    This class inherits from the `PsiException` class.
+
+    Example:
+        ```python
+        raise GrammarError("Invalid grammar encountered in the Psi code.")
+        ```
+    """