protobuf 继承? [英] protobuf with inheritance?

问题描述

是否可以将 protobuf 与继承的类一起使用?

Is it possible to use protobuf with classes who inherit?

我想做这样的事情

class Expr;
class AddExpr : Expr;
class CallFunc: Expr;

class FunctionBody{
    repeatable Expr expr;
}

推荐答案

不在核心实现中 - 您可能希望使用封装.

Not in the core implementation - you would want to use encapsulation instead.

但是，如果您使用只是protobuf-net，作为代码优先，我绕过它:

However if you are using just protobuf-net, as code-first, I hack around it:

[ProtoInclude(1, typeof(AddExpr))]
[ProtoInclude(2, typeof(CallFunc))]
[ProtoContract]
class Expr {}

[ProtoContract]
class AddExpr : Expr {} 
[ProtoContract]
class CallFunc: Expr {}

[ProtoContract]
class FunctionBody{
    private List<Expr> expressions;
    [ProtoMember(1)]
    public List<Expr> Expressions {
        get { return expressions ?? (expressions = new List<Expr>()); }
    }
}

当然，我假设类中有一些额外的细节——按原样"你可以只使用枚举( 得到了很好的支持).

Of course, I'm assuming there is some additional detail in the classes - "as is" you could just use an enum (which is well-supported).

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