dotnet/roslyn

IntelliSense complaining about not being able to find a type at assignment to "var"

Open

#11,084 建立於 2016年5月5日

在 GitHub 查看
 (2 留言) (0 反應) (0 負責人)C# (20,414 star) (4,257 fork)batch import
Area-CompilersBugConcept-Diagnostic Clarityhelp wanted

描述

Not sure if this by design, but it feels wrong - there's nothing I can do resolve this at the callsite:

image

The real problem is the declaration:

image

I can get together a repro (it's convoluted), but just wanted to confirm if this by design or not.

貢獻者指南

技術棧
csharp
領域
developer experience
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。
5
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。
needs investigation
前置要求
C#Basic understanding of Roslyn's type system
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。
10
研究方向
Investigate the type inference for var declarations in Roslyn's IntelliSense layer. Look at the binder or type checking code to understand the expected behavior. The issue mentions a convoluted repro, so try to create a minimal reproduction. Check if this is a known limitation or a bug in the semantic model.