dotnet/roslyn

C# Interactive REPL language version selection.

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#33,333 opened on Feb 12, 2019

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 (2 comments) (2 reactions) (1 assignee)C# (20,414 stars) (4,257 forks)batch import
Area-InteractiveBugInteractive-ScriptingIDEhelp wanted

Description

Using C# REPL with VS 2019 but can't test latest C# 8 features, is there a way to change language to latest in the REPL?

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Contributor guide

Tech stack
csharp
Domain
clideveloper experience
Issue type
feature
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.
1-2 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
Basic C# knowledgeUnderstanding of C# REPL
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
40
Research direction
Examine the C# REPL implementation in the Roslyn repository, specifically how the language version is currently set. Look at files such as 'src/Interactive/HostProcess/CSharpRepl.cs' and 'src/Interactive/EditorFeatures/CSharp/CSharpInteractiveEvaluator.cs'. There is no linked PR or active discussion, so investigate if any language version selection mechanism exists and consider adding a command line option or REPL command to switch language versions.