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fix(dts): `ngAcceptInputType_*` types drop some comments ngtsc keeps

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評估

難度
4/5
預估耗時
3-5 天
新手友好度
68/100
Issue 類型
缺陷
描述清晰度
描述清楚
活躍度
活躍
技術堆疊
angular, rust, typescript
領域
compilers

研究方向

Start in crates/oxc_angular_compiler/src/directive/dts_type.rs, focusing on leading_comments and same_line_comments. Compare the existing output for repro cases a–g with ngtsc 22.1.7, including U+2028/U+2029 line breaks. Done means the generated .d.ts preserves the same leading and trailing comments as ngtsc while leaving the type unchanged.

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描述

bug

#496 prints the transform's parameter type into .d.ts. It keeps a single-line block comment in front of a list element. ngtsc keeps more than that, and in some U+2028/U+2029 cases prints the comment twice. Only the comments in the .d.ts text differ. The type is the same.

Repro (each line is the parameter type of @Input({transform: (v: <TYPE>) => 1}) a)

# <TYPE> in source OXC (#504 tip) ngtsc 22.1.7
a string /** doc */ string string /** doc */
b string | number /** doc */ string | number string | number /** doc */
c \n /** doc */\n string (comment on its own line) string \n /** doc */\n string
d string | /* a\n b */ number string | number string | /* a\n b */ number
e Array</* a\n b */ string> Array<string> Array</* a\n b */ string>
f Array<
/* c */\nstring | number> Array<string | number> Array</* c */ /* c */ string | number>
g Array<
/* c */\nstring | number> Array<string | number> Array</* c */ /* c */ string | number>

Cases where they already match: Array</* c */ string>, string /* keep */ \| number, /* a\n b */ string (both drop it), string /* a\n b */ (both drop it), and { a: 1; // x
 b: ... }.

Full source for case a:

import {Directive, Input} from '@angular/core';
@Directive({selector: '[d]'})
export class D {
  @Input({transform: (v: string /** doc */) => 1}) a = 0;
}

Where

crates/oxc_angular_compiler/src/directive/dts_type.rs (added in #496): leading_comments / same_line_comments. Only the comments on the same line in front of a list element are kept. Trailing comments, comments on their own line and comments that span lines are dropped.

On main?

No. Main prints unknown for these fields. This gap comes with #496.

Direction

Copy the rules of TypeScript's emitter for leading and trailing comments on type nodes, including the U+2028/U+2029 line-break cases. Test against ngtsc output.

主要語言
Rust
星號
244
分支
26
平均合併
1 天 14 小時
30 天內合併 PR
77

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從這裡開始

  1. 先讀完整個 Issue,再讀專案的貢獻指南。
  2. 在 Issue 下留言說明你要接手 —— 這能避免兩個人做同樣的事。
  3. Fork 儲存庫,在一個分支上完成修改。
  4. 送出 Pull Request,並在描述裡引用這個 Issue 編號。

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