86 lines
2.5 KiB
Plaintext
86 lines
2.5 KiB
Plaintext
|
---
|
||
|
|
id: c70709d1-d0a6-4dec-9ce5-de04540e5de6
|
||
|
|
title: AssemblyGenerator
|
||
|
|
uti: com.xamarin.workbook
|
||
|
|
platforms:
|
||
|
|
- Console
|
||
|
|
---
|
||
|
|
|
||
|
|
From [this article](https://msdn.microsoft.com/en-us/library/system.runtime.compilerservices.isudtreturn\(v=vs.110\).aspx?cs-save-lang=1&cs-lang=csharp#code-snippet-1)
|
||
|
|
|
||
|
|
```csharp
|
||
|
|
using System.Reflection;
|
||
|
|
using System.Reflection.Emit;
|
||
|
|
using System.Runtime.CompilerServices;
|
||
|
|
using System.Threading;
|
||
|
|
```
|
||
|
|
|
||
|
|
```csharp
|
||
|
|
class CodeEmitter {
|
||
|
|
AssemblyBuilder asmBuilder;
|
||
|
|
string asmName;
|
||
|
|
ModuleBuilder modBuilder;
|
||
|
|
public CodeEmitter(string name) {
|
||
|
|
asmName = name;
|
||
|
|
AssemblyName aname = new AssemblyName { Name = name };
|
||
|
|
AppDomain currentDomain = Thread.GetDomain();
|
||
|
|
asmBuilder = currentDomain.DefineDynamicAssembly(aname, AssemblyBuilderAccess.RunAndSave);
|
||
|
|
modBuilder = asmBuilder.DefineDynamicModule(asmName);
|
||
|
|
}
|
||
|
|
|
||
|
|
public TypeBuilder CreateType(string name) {
|
||
|
|
return modBuilder.DefineType(name, TypeAttributes.Public);
|
||
|
|
}
|
||
|
|
|
||
|
|
public void WriteAssembly(MethodBuilder entryPoint) {
|
||
|
|
asmBuilder.SetEntryPoint(entryPoint);
|
||
|
|
asmBuilder.Save(asmName);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
```
|
||
|
|
|
||
|
|
```csharp
|
||
|
|
void main() {
|
||
|
|
CodeEmitter e = new CodeEmitter("test-mod.exe");
|
||
|
|
TypeBuilder mainClass = e.CreateType("MainClass");
|
||
|
|
|
||
|
|
// main method
|
||
|
|
MethodBuilder mBuilder = mainClass.DefineMethod("mainMethod", MethodAttributes.Static);
|
||
|
|
ILGenerator ilGen = mBuilder.GetILGenerator();
|
||
|
|
ilGen.Emit(OpCodes.Ldstr, "Hello World");
|
||
|
|
Type[] type = new [] {typeof(string)};
|
||
|
|
MethodInfo writeMI = typeof(Console).GetMethod("WriteLine", type);
|
||
|
|
ilGen.EmitCall(OpCodes.Call, writeMI, null);
|
||
|
|
ilGen.Emit(OpCodes.Ret);
|
||
|
|
|
||
|
|
Type[] fType = new [] { typeof(IsUdtReturn)};
|
||
|
|
|
||
|
|
// operator overload
|
||
|
|
MethodBuilder sBuilder = mainClass.DefineMethod(
|
||
|
|
"op_Decrement",
|
||
|
|
MethodAttributes.Static | MethodAttributes.SpecialName | MethodAttributes.Public,
|
||
|
|
CallingConventions.Any,
|
||
|
|
Type.GetType("System.Void"),
|
||
|
|
fType, // rtype required mods
|
||
|
|
null, // rtype optional mods
|
||
|
|
null, // parameters
|
||
|
|
null, // parameter modreq
|
||
|
|
null); // parameters modopt
|
||
|
|
|
||
|
|
var silGen = sBuilder.GetILGenerator();
|
||
|
|
silGen.Emit(OpCodes.Ret);
|
||
|
|
|
||
|
|
// field
|
||
|
|
//Type[] fType = new [] { typeof(IsUdtReturn)};
|
||
|
|
mainClass.DefineField("modifiedInteger", Type.GetType("System.Type"), fType, null, FieldAttributes.Public);
|
||
|
|
|
||
|
|
// write
|
||
|
|
mainClass.CreateType();
|
||
|
|
e.WriteAssembly(mBuilder);
|
||
|
|
Console.WriteLine("Assembly created");
|
||
|
|
}
|
||
|
|
```
|
||
|
|
|
||
|
|
```csharp
|
||
|
|
main();
|
||
|
|
```
|