facebookarchive/prepack

Support abstract functions with simple return types

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#2,514 创建于 2018年8月30日

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 (0 评论) (0 反应) (0 负责人)JavaScript (14,268 star) (520 fork)batch import
enhancementhelp wantedpriority: low

描述

I need this to work:

let f = __abstract(":object", "(__f)");
global.result = f().p;

But it currently fails because the access to .p is not known to be safe. I'd like to model that the result of the call to f is a simple object where all such accesses should simply be allowed, maybe via __abstract(":object(simple)", ...).

贡献者指南

技术栈
javascript
领域
toolingdeveloper experience
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
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1-2 days
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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
Understanding of Prepack's abstraction modelFamiliarity with JavaScript runtime semantics
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。
30
研究方向
The issue is about adding support for abstract functions with simple return types in Prepack. The proposed syntax is ` abstract(":object(simple)", ...)`. To implement, one would need to examine how Prepack currently handles abstract object types and property accesses. The relevant code likely resides in the abstract value handling files. There are no existing PRs or comments to refer to. The goal is to allow safe property access on abstract objects marked as 'simple'.