C # Use ILGenerator to dynamically generate a function,

C # Use ILGenerator to dynamically generate a function,

There is always a lot of configuration files to read on the game server, and the reading of these configuration files: * otherwise, it will be a bunch of strings or numbers, you cannot see the error (you need to check it again) * otherwise, it will be forced. You need to Parse each type.

I personally like the latter because the LoadConfig code of the former is simple, but the code is not simple when writing logic.

 1 class Config1 : public IConfig { 2   public void Fill(EntryLine& line); 3   int32_t param1; 4   string param2; 5   std::vector<int32_t> param3; 6 }; 7  8 void Config1::Fill(EntryLine& line) { 9   this->param1 = line.ReadInt32();10   this->param2 = line.ReadString();11   this->param3 = line.ReadVectorInt32();12 }

The approximate filling function is written above,ReadInt32This kind of function is fictitious and needs to be implemented by yourself (HUM)

Then this code is very annoying to write, and I don't really want to write it. This is the reason for this article.

C # There is XML deserialization in it. I define a class:

1 class Config1 {2   int32 param1;3   string param2;4   int[] param3;5 }6 7 XmlSerializer serializer = new XmlSerializer(typeof(Config1));8 var obj = (Config1)serializer.Deserialize(stream);

This deserialization is very simple. I actually want this thing, but Xml deserialization uses Node, and I want to use attributes, the other is the attribute value. I have some personalized things in it.

Thanks to Microsoft for providing the function of debugging the. NET Framework, so that I can debug the. NET source code and see how Microsoft implements it.

After some research, he found that he wasXmlSerializerWhen constructingConfig1Analyzed, and then generated some metadata, andRead/WriteMethod, Deserialize just calledReadMethod.

Now that you know how he implements it, you must study it for a while, and then you can discover it.

Basically, you have to extract onePrototypeAnd thenPrototypeProcedural.

PS: the performance has not been tested yet, so it should not be too bad. The worst is that the server starts slowly for several seconds.

XmlSerializationReaderILGen. cs