dotnet/roslyn

Explicit method group conversion suppresses unnecessary qualification warning

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#1,208 opened on Mar 12, 2015

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Description

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.

Contributor guide

Research direction
Examine how Roslyn emits the ‘unnecessary qualification’ warning (IDE0004) and why explicit method group conversions suppress it; trace the diagnostic logic for ‘this.’ qualifier removal.
Tech stack
csharp
Domain
compilers
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
C#
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
60