dotnet/roslyn

Explicit method group conversion suppresses unnecessary qualification warning

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#1,208 建立於 2015年3月12日

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Area-AnalyzersBughelp wanted

描述

using System;

class X {
    void M() { R((Action)this.M); }
    void R(Action a) { }
}

(Action) is highlighted as unnecessary, but this. isn't. Removing (Action) correctly highlights it in gray.

Typename qualifiers for static methods are similarly missed, but namespace qualifiers are not.

貢獻者指南

技術棧
csharp
領域
tooling
議題類型
bug
難度面向新貢獻者的預計實作難度，1 表示很小改動，5 表示專家級工作。
4
預計時間有經驗貢獻者完成調查、實作、測試並準備 pull request 的粗略時間範圍。
over 1 week
活動狀態議題目前的可參與程度：新鮮、活躍、陳舊、阻塞或等待維護者輸入。
stale
清晰度議題是否清楚說明預期改動、驗收標準和下一步。
clear
前置要求
C#Roslyn compiler architecturecode analysisIDE features
新手友善度1-100 的估計分數，表示該議題對首次貢獻者的友善程度。
20
研究方向
Investigate the Roslyn analyzer responsible for unnecessary qualification warnings. Look at the code for detecting qualifier redundancy, particularly the interaction with explicit method group conversions. The issue indicates that the warning is not triggered for 'this.' qualifier when an explicit cast is present, unlike namespace qualifiers. Start by examining the relevant diagnostic analyzer files in the Roslyn source, and check if there are any linked PRs or comments that might provide context.