jashkenas/coffeescript

Support export destructured assignment

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#5,100 建立於 2018年8月26日

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 (2 留言) (0 反應) (0 負責人)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:

貢獻者指南

技術棧
javascript
領域
tooling
議題類型
feature
難度面向新貢獻者的預計實作難度，1 表示很小改動，5 表示專家級工作。
3
預計時間有經驗貢獻者完成調查、實作、測試並準備 pull request 的粗略時間範圍。
half day
活動狀態議題目前的可參與程度：新鮮、活躍、陳舊、阻塞或等待維護者輸入。
stale
清晰度議題是否清楚說明預期改動、驗收標準和下一步。
clear
前置要求
basic CoffeeScript knowledgeunderstanding of compiler parsing
新手友善度1-100 的估計分數，表示該議題對首次貢獻者的友善程度。
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.