swiftlang/swift

[SR-4294] Warn about overly-nested generic type specifiers

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#46,877 创建于 2017年3月20日

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bugcompilerdiagnostics qualitygood first issue

描述
Previous ID SR-4294
Radar None
Original Reporter @jckarter
Type Bug
Votes 0
Component/s Compiler
Labels Bug, DiagnosticsQoI, StarterBug
Assignee None
Priority Medium

md5: c1aab4167ab2d03975e533b9a662698f

Issue Description:

https://twitter.com/steipete/status/843896945718546434

The tweet is in C++, but the same problem could affect Swift. A warning about overly-nested generic type specifiers that have enough piled-up closing >>>>>> brackets to be mistaken for a conflict marker in version control might be helpful, not only for tooling interaction, but for code cleanliness, since you should probably consider using a type alias at that point.

贡献者指南

技术栈
swift
领域
developer experiencetooling
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
Swift basicsCompiler architectureSwift generics syntax
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。
60
研究方向
Investigate the Swift compiler's diagnostic system to understand how warnings are emitted for complex types. Look at the parser or type checker for handling nested generic type specifiers. Consider adding a warning when the nesting depth exceeds a certain threshold. Refer to existing warnings in the compiler for guidance.
[SR-4294] Warn about overly-nested generic type specifiers · swiftlang/swift#46877 | Good First Issue