JuliaLang/julia

parse command interpolations at parse time

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#3,150 创建于 2013年5月19日

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 (13 评论) (0 反应) (0 负责人)Julia (48,709 star) (5,773 fork)batch import
help wantedparser

描述

It would be nice to have a way to "double interpolate" a variable with respects to nested possible interpolation contexts to make it easier to write quoted code blocks that wants to interpolate a variable inside a string. e.g., so the below code echos "hi". Not sure what the best way to go about that is.

macro example()
 f="hi"
 quote
  run(`echo $$f`)
 end
end

贡献者指南

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无
领域
backend
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。
4
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。
over 1 week
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。
mostly clear
前置要求
Familiarity with Julia macrosKnowledge of Julia's expression interpolation
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。
15
研究方向
Examine the Julia parser's handling of string interpolation and command quotes. The issue suggests adding a way to double interpolate, which would require changes to the parser's macro expansion code. Look at relevant files such as `src/julia parser.scm` and `base/parse.jl`. Also review existing discussions in the issue comments for potential approaches.
parse command interpolations at parse time · JuliaLang/julia#3150 | Good First Issue