Add Coconut line numbers to MyPy output

描述

贡献者指南

技术栈

python

领域

toolingdeveloper experiencebuild system

议题类型

feature

难度面向新贡献者的预计实现难度，1 表示很小改动，5 表示专家级工作。

3

预计时间有经验贡献者完成调查、实现、测试并准备 pull request 的粗略时间范围。

half day

活动状态议题当前的可参与程度：新鲜、活跃、陈旧、阻塞或等待维护者输入。

stale

清晰度议题是否清楚说明期望改动、验收标准和下一步。

clear

前置要求

PythonCoconut syntax basics

新手友好度1-100 的估计分数，表示该议题对首次贡献者的友好程度。

40

研究方向

Investigate how Coconut currently outputs MyPy results and trace the line number mapping. Look at files like `coconut/compiler.py` or `coconut/mypy.py` to understand the existing output formatting. The goal is to prepend the original Coconut line number to the Python line number in the MyPy error messages. Check the comments in issue #332 for any previous attempts or discussions. Implement a mapping that translates the compiled Python line numbers back to the source Coconut line numbers.