Deprecated should support contextual type with signature resolution

描述

// A *self-contained* demonstration of the problem follows...
// Test this by running `tsc` on the command-line, rather than through another build tool such as Gulp, Webpack, etc.

declare function h(v: (a: string) => void)

declare function vv (): void
/** @deprecated */
declare function vv (v: string): void
declare function vv (v?: string): void

h([|vv|])

贡献者指南

技术栈

typescript

领域

tooling

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。

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。

1-2 days

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

TypeScript basicsoverload signaturesJSDoc deprecated

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

Investigate the TypeScript compiler's handling of deprecated overloads in contextual type positions. Focus on the checker.ts file, particularly the function that resolves signatures for overloaded functions. Check how the @deprecated JSDoc tag is propagated when the function is passed as an argument with a contextual type. The relevant code is likely in the checkCallExpression or related areas.