errors.py

# NanoBASIC/errors.py
# From Computer Science from Scratch
# Copyright 2024 David Kopec
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# DESCRIPTION
# The errors module contains the custom exceptions used in the NanoBASIC
# interpreter including ParserError and InterpreterError.
from NanoBASIC.tokenizer import Token
from NanoBASIC.nodes import Node


class NanoBASICError(Exception):
    def __init__(self, message: str, line_num: int, column: int):
        super().__init__(message)
        self.message = message
        self.line_num = line_num
        self.column = column

    def __str__(self):
        return (f"{self.message} Occurred at line {self.line_num} "
                f"and column {self.column}")


class ParserError(NanoBASICError):
    def __init__(self, message: str, token: Token):
        super().__init__(message, token.line_num, token.col_start)


class InterpreterError(NanoBASICError):
    def __init__(self, message: str, node: Node):
        super().__init__(message, node.line_num, node.col_start)