jashkenas/coffeescript

Support export destructured assignment

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#5,100 创建于 2018年8月26日

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 (2 评论) (0 反应) (0 负责人)CoffeeScript (16,577 star) (1,980 fork)batch import
enhancementhelp wanted

描述

Choose one: is this a bug report or feature request? Feature request

@GeoffreyBooth I came across an unsupported export syntax that appears to be standard

Input Code

export {foo, bar} = item

Expected Behavior

Should transpile to export var {foo, bar} = item

Current Behavior

Doesn't compile

Possible Solution

Guessing it won't be bad to add this as a supported grammar rule

Context

Not blocking anything, just came across it while working on AST stuff

Environment

  • CoffeeScript version:
  • Node.js version:

贡献者指南

技术栈
javascript
领域
tooling
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
basic CoffeeScript knowledgeunderstanding of compiler parsing
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
Examine the CoffeeScript grammar file (likely src/grammar.coffee) to understand how destructuring assignments and export statements are currently parsed. Look at existing export rules and how they generate JavaScript code. Implement a new grammar rule to handle `export {foo, bar} = item` and ensure it transpiles to `export var {foo, bar} = item`. Also add relevant tests.