contravariance

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Covariance and Contravariance with LSP

What is the relationship between LS开发者_运维百科P and Covariance and Contravariance? Is there any relationship? Is LSP a form of Covariance ?I wouldn\'t say that Liskov\'s Substitution Principle is[详细]

2023-01-19 15:09 分类：问答
Why .NET 4 variance for generic type arguments not also for classes? [duplicate]

This question already has answers here: Closed 12 years ago. Possible Duplicates: Why isn't there generic variance for classes 开发者_运维技巧in C# 4.0?[详细]

2023-01-18 13:56 分类：问答
Missing compile/runtime error when inlining

I have the following classes/traits in Scala trait Write[-T] { def add(elem : T); } class ContraListWrapper[T] (var list : List[T]) extends Write[T]{[详细]

2023-01-14 22:47 分类：问答
Mnemonic for C# generic types

I often forget if i have to use in or out when defining covarient and contravarient generic types. In java i have the mnemonic PECS (producer extends consumer super) to help me. Do you know a similar[详细]

2023-01-14 10:06 分类：问答
Examples of good, real-life use-cases for covariance and contravariance in C# 4.0?

Before C# 4.0 came out, I was quite excited about covariance and contravariance. It pandered to my fondness for theoretical correctness![详细]

2023-01-13 14:49 分类：问答
Why is C# 4.0's covariance/contravariance limited to parameterized interface and delegate types?

Is this a limitation of the CLR or are there compatibility concerns with existing code? Is this related to the messed up variance of delegate combining in C# 4.0?[详细]

2023-01-10 00:08 分类：问答
Scala: issues using functions as first class objects

I need to have a collection of generic functions, but I can\'t get it done in the way I like. I created a[详细]

2023-01-09 22:20 分类：问答
Contravariance isn't working

public interface IMyControl<in T> where T : ICoreEntity { void SetEntity(T dataObject); } public class MyControl : UserControl, IMyControl<DataObject>// DataObject implements ICoreEntity[详细]

2023-01-09 22:04 分类：问答
Contra- and Co-variance - CLR via C#

In the CLR via c# third edition there is an example that I cant seem to make sense of: Invariant Meaning that that generic[详细]

2023-01-09 01:51 分类：问答
Why aren't classes in .NET 4 covariant? [duplicate]

This question already has answers here: Closed 12 years ago. Possible Duplicate: Why isn’t there generic variance for classes in C# 4.0?[详细]

2023-01-01 20:20 分类：问答