gleam-lang/gleam

Formatter unnecessarily wraps expressions inside bit array size segments in a block.

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#5,606 创建于 2026年4月11日

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 (3 评论) (0 反应) (1 负责人)Rust (21,417 star) (960 fork)batch import
help wanted

描述

Given this like:

  let slice = <<bits:bits-size(count * marshal_zone_size)-unit(8)>>

The formatter will modify it to:

  let slice = <<bits:bits-size({ count * marshal_zone_size })-unit(8)>>

Even though the original is less than 80 characters wide.

贡献者指南

技术栈
rust
领域
developer experience
议题类型
bug
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。
2
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。
1-3 hours
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。
active
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
Gleam syntax basicsRust programmingAST manipulation
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。
70
研究方向
Start by looking at the formatter code in the `compiler core/src/format.rs` file (or similar). Identify where bit array size expressions are handled. The issue shows that when the expression is under 80 characters, it should not be wrapped in braces. Check the condition that triggers the wrapping, and modify it to account for line length. Review the test suite for formatting to ensure no regressions. There are 3 comments on the issue, so read those for any additional context.
Formatter unnecessarily wraps expressions inside bit array size segments in a block. · gleam-lang/gleam#5606 | Good First Issue