C # - 5395
Ermöglicht die Ausgabe von CIL- Code zur Hinzufügung mithilfe einer dynamischen Methode. Eigentlich gebe ich Code aus, der wiederum Code zum Aufrufen der Ganzzahladdition ausgibt. Die folgende Funktion erstellt Add()
eine dynamische Methode, die beim Ausführen eine dynamische Methode zum Aufrufen der Ganzzahladdition erstellt.
using System;
using System.Reflection.Emit;
namespace JA
{
class Program
{
static void Main(string[] args)
{
int z=Add(1, 2);
// z = 3
}
// Emit MSIL to emit MSIL
public static int Add(int x, int y)
{
Type delegate_type=typeof(Func<int, int, int>);
DynamicMethod method=new DynamicMethod(typeof(int).ToString()+".op_Addition",
typeof(int),
new Type[] { typeof(int), typeof(int) }, typeof(Program));
ILGenerator generator=method.GetILGenerator();
LocalBuilder method1=generator.DeclareLocal(typeof(DynamicMethod));
LocalBuilder generator1=generator.DeclareLocal(typeof(ILGenerator));
LocalBuilder add1=generator.DeclareLocal(typeof(Func<int, int, int>));
LocalBuilder args1=generator.DeclareLocal(typeof(Type[]));
generator.Emit(OpCodes.Ldtoken, typeof(int));
generator.Emit(OpCodes.Call,
typeof(Type).GetMethod("GetTypeFromHandle",
System.Reflection.BindingFlags.Public|
System.Reflection.BindingFlags.Static));
generator.Emit(OpCodes.Callvirt,
typeof(object).GetMethod("ToString",
System.Reflection.BindingFlags.Public|
System.Reflection.BindingFlags.Instance));
generator.Emit(OpCodes.Ldstr, ".op_Addition");
generator.Emit(OpCodes.Call,
typeof(string).GetMethod("Concat",
new Type[] { typeof(string), typeof(string) }));
generator.Emit(OpCodes.Ldtoken, typeof(int));
generator.Emit(OpCodes.Call,
typeof(Type).GetMethod("GetTypeFromHandle",
System.Reflection.BindingFlags.Public|
System.Reflection.BindingFlags.Static));
generator.Emit(OpCodes.Ldc_I4, 2);
generator.Emit(OpCodes.Newarr, typeof(Type));
generator.Emit(OpCodes.Stloc_3);
generator.Emit(OpCodes.Ldloc_3);
generator.Emit(OpCodes.Ldc_I4, 0);
generator.Emit(OpCodes.Ldtoken, typeof(int));
generator.Emit(OpCodes.Call,
typeof(Type).GetMethod("GetTypeFromHandle",
System.Reflection.BindingFlags.Public|
System.Reflection.BindingFlags.Static));
generator.Emit(OpCodes.Stelem_Ref);
generator.Emit(OpCodes.Ldloc_3);
generator.Emit(OpCodes.Ldc_I4, 1);
generator.Emit(OpCodes.Ldtoken, typeof(int));
generator.Emit(OpCodes.Call,
typeof(Type).GetMethod("GetTypeFromHandle",
System.Reflection.BindingFlags.Public|
System.Reflection.BindingFlags.Static));
generator.Emit(OpCodes.Stelem_Ref);
generator.Emit(OpCodes.Ldloc_3);
generator.Emit(OpCodes.Ldtoken, typeof(Program));
generator.Emit(OpCodes.Call,
typeof(Type).GetMethod("GetTypeFromHandle",
System.Reflection.BindingFlags.Public|
System.Reflection.BindingFlags.Static));
generator.Emit(OpCodes.Newobj,
typeof(DynamicMethod).GetConstructor(
new Type[] { typeof(string), typeof(Type), typeof(Type[]), typeof(Type) }));
generator.Emit(OpCodes.Stloc_0);
generator.Emit(OpCodes.Ldloc_0);
generator.Emit(OpCodes.Callvirt,
typeof(DynamicMethod).GetMethod("GetILGenerator",
Type.EmptyTypes));
generator.Emit(OpCodes.Stloc_1);
generator.Emit(OpCodes.Ldloc_1);
generator.Emit(OpCodes.Ldtoken, typeof(int));
generator.Emit(OpCodes.Call,
typeof(Type).GetMethod("GetTypeFromHandle",
System.Reflection.BindingFlags.Public|
System.Reflection.BindingFlags.Static));
generator.Emit(OpCodes.Callvirt,
typeof(ILGenerator).GetMethod("DeclareLocal",
new Type[] { typeof(Type) }));
generator.Emit(OpCodes.Pop);
generator.Emit(OpCodes.Ldloc_1);
generator.Emit(OpCodes.Ldsfld,
typeof(OpCodes).GetField("Ldarg_0",
System.Reflection.BindingFlags.Public|System.Reflection.BindingFlags.Static));
generator.Emit(OpCodes.Callvirt,
typeof(ILGenerator).GetMethod("Emit", new Type[] { typeof(OpCode) }));
generator.Emit(OpCodes.Ldloc_1);
generator.Emit(OpCodes.Ldsfld,
typeof(OpCodes).GetField("Ldarg_1",
System.Reflection.BindingFlags.Public|System.Reflection.BindingFlags.Static));
generator.Emit(OpCodes.Callvirt,
typeof(ILGenerator).GetMethod("Emit", new Type[] { typeof(OpCode) }));
generator.Emit(OpCodes.Ldloc_1);
generator.Emit(OpCodes.Ldsfld,
typeof(OpCodes).GetField("Add",
System.Reflection.BindingFlags.Public|System.Reflection.BindingFlags.Static));
generator.Emit(OpCodes.Callvirt,
typeof(ILGenerator).GetMethod("Emit", new Type[] { typeof(OpCode) }));
generator.Emit(OpCodes.Ldloc_1);
generator.Emit(OpCodes.Ldsfld,
typeof(OpCodes).GetField("Stloc_0",
System.Reflection.BindingFlags.Public|System.Reflection.BindingFlags.Static));
generator.Emit(OpCodes.Callvirt,
typeof(ILGenerator).GetMethod("Emit", new Type[] { typeof(OpCode) }));
generator.Emit(OpCodes.Ldloc_1);
generator.Emit(OpCodes.Ldsfld,
typeof(OpCodes).GetField("Ldloc_0",
System.Reflection.BindingFlags.Public|System.Reflection.BindingFlags.Static));
generator.Emit(OpCodes.Callvirt,
typeof(ILGenerator).GetMethod("Emit", new Type[] { typeof(OpCode) }));
generator.Emit(OpCodes.Ldloc_1);
generator.Emit(OpCodes.Ldsfld,
typeof(OpCodes).GetField("Ret",
System.Reflection.BindingFlags.Public|System.Reflection.BindingFlags.Static));
generator.Emit(OpCodes.Callvirt,
typeof(ILGenerator).GetMethod("Emit", new Type[] { typeof(OpCode) }));
generator.Emit(OpCodes.Ldloc_0);
generator.Emit(OpCodes.Ldtoken, typeof(Func<int, int, int>));
generator.Emit(OpCodes.Call,
typeof(Type).GetMethod("GetTypeFromHandle",
System.Reflection.BindingFlags.Public|
System.Reflection.BindingFlags.Static));
generator.Emit(OpCodes.Callvirt,
typeof(DynamicMethod).GetMethod("CreateDelegate",
new Type[] { typeof(Type) }));
generator.Emit(OpCodes.Isinst, typeof(Func<int, int, int>));
generator.Emit(OpCodes.Stloc_2);
generator.Emit(OpCodes.Ldloc_2);
generator.Emit(OpCodes.Ldarg_0);
generator.Emit(OpCodes.Ldarg_1);
generator.Emit(OpCodes.Callvirt,
typeof(Func<int, int, int>).GetMethod("Invoke",
System.Reflection.BindingFlags.Public|System.Reflection.BindingFlags.Instance));
generator.Emit(OpCodes.Ret);
Func<int, int, int> add2=method.CreateDelegate(typeof(Func<int, int, int>)) as Func<int, int, int>;
return add2(x, y);
}
}
}