1 files changed, 13 insertions, 0 deletions
diff --git a/neb/exceptions.py b/neb/exceptions.py
new file mode 100644
index 0000000..8bbe000
--- /dev/null
+++ b/neb/exceptions.py
@@ -0,0 +1,13 @@
+class NebPanic(BaseException):
+    pass
+
+class InterpretPanic(NebPanic):
+    def __init__(self, sym, msg, arg=None):
+        big_message = f"[{sym.line}] '{sym.name}': {msg}"
+        if arg is not None:
+            big_message += f" (got {arg})"
+        super().__init__(big_message)
+
+class LexError(NebPanic):
+    def __init__(self, message, line):
+        super().__init__(f"line {line}: {message}")