dotnet/roslyn

Support Dynamic Deconstruction

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#32,709 opened on Jan 23, 2019

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 (5 comments) (0 reactions) (0 assignees)C# (4,257 forks)batch import
Area-CompilersFeature - TuplesFeature Requesthelp wanted

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Description

I expect the following to compile:

dynamic data = new { foo = 42 };
var ( foo ) = data;

But instead I get the error:

image

The type of foo can be inferred. It's dynamic!

Contributor guide

Research direction
Investigate the current implementation of deconstruction for static types in the C# compiler and explore how to extend it to support dynamic types, focusing on the type inference and lowering phases.
Tech stack
csharp
Domain
backend
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
C#dynamicdeconstruction
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
40