OpCodes クラスとは？ わかりやすく解説

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OpCodes クラス

ILGenerator クラス メンバ (Emit など) による出力に対する MSIL (Microsoft Intermediate Language) 命令のフィールド表現を提供します。

名前空間: System.Reflection.Emit
アセンブリ: mscorlib (mscorlib.dll 内)
構文構文

Visual Basic (宣言)
<ComVisibleAttribute(True)> _
Public Class OpCodes
Visual Basic (使用法)
Dim instance As OpCodes
C#
[ComVisibleAttribute(true)] 
public class OpCodes
C++
[ComVisibleAttribute(true)] 
public ref class OpCodes
J#
/** @attribute ComVisibleAttribute(true) */ 
public class OpCodes
JScript
ComVisibleAttribute(true) 
public class OpCodes
解説解説

メンバ オペコードの詳細については、共通言語基盤 (CLI: Common Language Infrastructure) のドキュメント、特に「Partition III: CIL Instruction Set」と「Partition II: Metadata Definition and Semantics」を参照してください。このドキュメントは、http://msdn.microsoft.com/net/ecma/ および http://www.ecma-international.org/publications/standards/Ecma-335.htm で入手できます。

使用例使用例

ILGenerator を使用して、動的メソッドを作成し、OpCodes を MethodBuilder に出力する方法を次の例に示します。

Visual Basic
Imports System
Imports System.Threading
Imports System.Reflection
Imports System.Reflection.Emit

 _

Class EmitWriteLineDemo
   
   
   Public Shared Function
 CreateDynamicType() As Type

      Dim ctorParams() As Type = {GetType(Integer),
 GetType(Integer)}
      
      Dim myDomain As AppDomain = Thread.GetDomain()
      Dim myAsmName As New
 AssemblyName()
      myAsmName.Name = "MyDynamicAssembly"
      
      Dim myAsmBuilder As AssemblyBuilder =
 myDomain.DefineDynamicAssembly(myAsmName, AssemblyBuilderAccess.RunAndSave)
      
      Dim pointModule As ModuleBuilder = myAsmBuilder.DefineDynamicModule("PointModule",
 "Point.dll")
      
      Dim pointTypeBld As TypeBuilder = pointModule.DefineType("Point",
 _
                                   TypeAttributes.Public)
      
      Dim xField As FieldBuilder = pointTypeBld.DefineField("x",
 _
                                GetType(Integer),
 _
                                FieldAttributes.Public)
      Dim yField As FieldBuilder = pointTypeBld.DefineField("y",
 _
                                GetType(Integer),
 _
                                 FieldAttributes.Public)
      
      
      Dim objType As Type = Type.GetType("System.Object")
      Dim objCtor As ConstructorInfo = objType.GetConstructor(New
 Type(){})
      
      Dim pointCtor As ConstructorBuilder =
 pointTypeBld.DefineConstructor( _
                             MethodAttributes.Public, _
                             CallingConventions.Standard, _
                             ctorParams)
      Dim ctorIL As ILGenerator = pointCtor.GetILGenerator()
      
      
      ' First, you build the constructor.

      ctorIL.Emit(OpCodes.Ldarg_0)
      ctorIL.Emit(OpCodes.Call, objCtor)
      ctorIL.Emit(OpCodes.Ldarg_0)
      ctorIL.Emit(OpCodes.Ldarg_1)
      ctorIL.Emit(OpCodes.Stfld, xField)
      ctorIL.Emit(OpCodes.Ldarg_0)
      ctorIL.Emit(OpCodes.Ldarg_2)
      ctorIL.Emit(OpCodes.Stfld, yField)
      ctorIL.Emit(OpCodes.Ret)
      
      '  Now, you'll build a method to output some information on the
      ' inside your dynamic class. This method will have the following
      ' definition in C#:
      '  Public Sub WritePoint() 

      Dim writeStrMthd As MethodBuilder = pointTypeBld.DefineMethod("WritePoint",
 _
                                    MethodAttributes.Public, _
                                    Nothing, Nothing)
      
      Dim writeStrIL As ILGenerator = writeStrMthd.GetILGenerator()
      
      ' The below ILGenerator created demonstrates a few ways to create
      ' string output through STDIN. 
      ' ILGenerator.EmitWriteLine(string) will generate a ldstr and
 a 
      ' call to WriteLine for you.

      writeStrIL.EmitWriteLine("The value of this current instance
 is:")
      
      ' Here, you will do the hard work yourself. First, you need to
 create
      ' the string we will be passing and obtain the correct WriteLine
 overload
      ' for said string. In the below case, you are substituting in
 two values,
      ' so the chosen overload is Console.WriteLine(string, object,
 object).

      Dim inStr As [String] = "({0},
 {1})"
      Dim wlParams() As Type = {GetType(String),
 GetType(Object), GetType(Object)}
      
      ' We need the MethodInfo to pass into EmitCall later.

      Dim writeLineMI As MethodInfo = GetType(Console).GetMethod("WriteLine",
 wlParams)
      
      ' Push the string with the substitutions onto the stack.
      ' This is the first argument for WriteLine - the string one. 

      writeStrIL.Emit(OpCodes.Ldstr, inStr)
      
      ' Since the second argument is an object, and it corresponds to
      ' to the substitution for the value of our integer field, you
 
      ' need to box that field to an object. First, push a reference
      ' to the current instance, and then push the value stored in
      ' field 'x'. We need the reference to the current instance (stored
      ' in local argument index 0) so Ldfld can load from the correct
      ' instance (this one).

      writeStrIL.Emit(OpCodes.Ldarg_0)
      writeStrIL.Emit(OpCodes.Ldfld, xField)
      
      ' Now, we execute the box opcode, which pops the value of field
 'x',
      ' returning a reference to the integer value boxed as an object.

      writeStrIL.Emit(OpCodes.Box, GetType(Integer))
      
      ' Atop the stack, you'll find our string inStr, followed by a
 reference
      ' to the boxed value of 'x'. Now, you need to likewise box field
 'y'.

      writeStrIL.Emit(OpCodes.Ldarg_0)
      writeStrIL.Emit(OpCodes.Ldfld, yField)
      writeStrIL.Emit(OpCodes.Box, GetType(Integer))
      
      ' Now, you have all of the arguments for your call to
      ' Console.WriteLine(string, object, object) atop the stack:
      ' the string InStr, a reference to the boxed value of 'x', and
      ' a reference to the boxed value of 'y'.
      ' Call Console.WriteLine(string, object, object) with EmitCall.

      writeStrIL.EmitCall(OpCodes.Call, writeLineMI, Nothing)
      
      ' Lastly, EmitWriteLine can also output the value of a field
      ' using the overload EmitWriteLine(FieldInfo).

      writeStrIL.EmitWriteLine("The value of 'x'
 is:")
      writeStrIL.EmitWriteLine(xField)
      writeStrIL.EmitWriteLine("The value of 'y'
 is:")
      writeStrIL.EmitWriteLine(yField)
      
      ' Since we return no value (void), the the ret opcode will not
      ' return the top stack value.

      writeStrIL.Emit(OpCodes.Ret)
      
      Return pointTypeBld.CreateType()

   End Function 'CreateDynamicType
    
   
   Public Shared Sub Main()
      
      Dim ctorParams(1) As Object
      
      Console.Write("Enter a integer value for X: ")
      Dim myX As String
 = Console.ReadLine()
      Console.Write("Enter a integer value for Y: ")
      Dim myY As String
 = Console.ReadLine()
      
      Console.WriteLine("---")
      
      ctorParams(0) = Convert.ToInt32(myX)
      ctorParams(1) = Convert.ToInt32(myY)
      
      Dim ptType As Type = CreateDynamicType()

      Dim ptInstance As Object
 = Activator.CreateInstance(ptType, ctorParams)

      ptType.InvokeMember("WritePoint", _
              BindingFlags.InvokeMethod, _
              Nothing, ptInstance, Nothing)

   End Sub 'Main

End Class 'EmitWriteLineDemo
C#
using System;
using System.Threading;
using System.Reflection;
using System.Reflection.Emit;

class EmitWriteLineDemo {

   public static Type CreateDynamicType() {
       
       Type[] ctorParams = new Type[] {typeof(int)
,
                   typeof(int)};
     
       AppDomain myDomain = Thread.GetDomain();
       AssemblyName myAsmName = new AssemblyName();
       myAsmName.Name = "MyDynamicAssembly";

       AssemblyBuilder myAsmBuilder = myDomain.DefineDynamicAssembly(
                      myAsmName, 
                      AssemblyBuilderAccess.RunAndSave);

       ModuleBuilder pointModule = myAsmBuilder.DefineDynamicModule("PointModule"
,
                                    "Point.dll");

       TypeBuilder pointTypeBld = pointModule.DefineType("Point",
                                  TypeAttributes.Public);

       FieldBuilder xField = pointTypeBld.DefineField("x", typeof(int)
,
                                                      FieldAttributes.Public);
       FieldBuilder yField = pointTypeBld.DefineField("y", typeof(int),
 
                                                      FieldAttributes.Public);


       Type objType = Type.GetType("System.Object"); 
       ConstructorInfo objCtor = objType.GetConstructor(new Type[0]);

       ConstructorBuilder pointCtor = pointTypeBld.DefineConstructor(
                                    MethodAttributes.Public,
                                   CallingConventions.Standard,
                                   ctorParams);
       ILGenerator ctorIL = pointCtor.GetILGenerator();


       // First, you build the constructor.
       ctorIL.Emit(OpCodes.Ldarg_0);
       ctorIL.Emit(OpCodes.Call, objCtor);
       ctorIL.Emit(OpCodes.Ldarg_0);
       ctorIL.Emit(OpCodes.Ldarg_1);
       ctorIL.Emit(OpCodes.Stfld, xField); 
       ctorIL.Emit(OpCodes.Ldarg_0);
       ctorIL.Emit(OpCodes.Ldarg_2);
       ctorIL.Emit(OpCodes.Stfld, yField); 
       ctorIL.Emit(OpCodes.Ret); 

       //  Now, you'll build a method to output some information on
 the
       // inside your dynamic class. This method will have the following
       // definition in C#:
    //  public void WritePoint()
      
       MethodBuilder writeStrMthd = pointTypeBld.DefineMethod(
                                     "WritePoint", 
                             MethodAttributes.Public,
                                             typeof(void), 
                                             null);

       
       ILGenerator writeStrIL = writeStrMthd.GetILGenerator();
      
       // The below ILGenerator created demonstrates a few ways to create
       // string output through STDIN. 

       // ILGenerator.EmitWriteLine(string) will generate a ldstr and
 a 
       // call to WriteLine for you.

       writeStrIL.EmitWriteLine("The value of this current
 instance is:");

       // Here, you will do the hard work yourself. First, you need
 to create
       // the string we will be passing and obtain the correct WriteLine
 overload
       // for said string. In the below case, you are substituting in
 two values,
       // so the chosen overload is Console.WriteLine(string, object,
 object).

       String inStr = "({0}, {1})";
       Type[] wlParams = new Type[] {typeof(string)
,
                     typeof(object),
                     typeof(object)};

       // We need the MethodInfo to pass into EmitCall later.

       MethodInfo writeLineMI = typeof(Console).GetMethod(
                            "WriteLine",
                        wlParams);

       // Push the string with the substitutions onto the stack.
       // This is the first argument for WriteLine - the string one.
 

       writeStrIL.Emit(OpCodes.Ldstr, inStr);

       // Since the second argument is an object, and it corresponds
 to
       // to the substitution for the value of our integer field, you
 
       // need to box that field to an object. First, push a reference
       // to the current instance, and then push the value stored in
       // field 'x'. We need the reference to the current instance (stored
       // in local argument index 0) so Ldfld can load from the correct
       // instance (this one).

       writeStrIL.Emit(OpCodes.Ldarg_0);
       writeStrIL.Emit(OpCodes.Ldfld, xField);

       // Now, we execute the box opcode, which pops the value of field
 'x',
       // returning a reference to the integer value boxed as an object.

       writeStrIL.Emit(OpCodes.Box, typeof(int));

       // Atop the stack, you'll find our string inStr, followed by
 a reference
       // to the boxed value of 'x'. Now, you need to likewise box field
 'y'.

       writeStrIL.Emit(OpCodes.Ldarg_0);
       writeStrIL.Emit(OpCodes.Ldfld, yField);
       writeStrIL.Emit(OpCodes.Box, typeof(int));

       // Now, you have all of the arguments for your call to
       // Console.WriteLine(string, object, object) atop the stack:
       // the string InStr, a reference to the boxed value of 'x', and
       // a reference to the boxed value of 'y'.

       // Call Console.WriteLine(string, object, object) with EmitCall.

       writeStrIL.EmitCall(OpCodes.Call, writeLineMI, null);

       // Lastly, EmitWriteLine can also output the value of a field
       // using the overload EmitWriteLine(FieldInfo).

       writeStrIL.EmitWriteLine("The value of 'x' is:");
       writeStrIL.EmitWriteLine(xField);
       writeStrIL.EmitWriteLine("The value of 'y' is:");
       writeStrIL.EmitWriteLine(yField);

       // Since we return no value (void), the the ret opcode will not
       // return the top stack value.

       writeStrIL.Emit(OpCodes.Ret);
      
       return pointTypeBld.CreateType();

   }

   public static void Main()
 {

      object[] ctorParams = new object[2];

      Console.Write("Enter a integer value for X: ");
 
      string myX = Console.ReadLine();
      Console.Write("Enter a integer value for Y: ");
 
      string myY = Console.ReadLine();

      Console.WriteLine("---");

      ctorParams[0] = Convert.ToInt32(myX);
      ctorParams[1] = Convert.ToInt32(myY);

      Type ptType = CreateDynamicType();
  
      object ptInstance = Activator.CreateInstance(ptType, ctorParams);
      ptType.InvokeMember("WritePoint",
              BindingFlags.InvokeMethod,
              null,
              ptInstance,
              new object[0]);
   }
}
C++
using namespace System;
using namespace System::Threading;
using namespace System::Reflection;
using namespace System::Reflection::Emit;
Type^ CreateDynamicType()
{
   array<Type^>^ctorParams = {int::typeid,int::typeid};
   AppDomain^ myDomain = Thread::GetDomain();
   AssemblyName^ myAsmName = gcnew AssemblyName;
   myAsmName->Name = "MyDynamicAssembly";
   AssemblyBuilder^ myAsmBuilder = myDomain->DefineDynamicAssembly( myAsmName,
 AssemblyBuilderAccess::RunAndSave );
   ModuleBuilder^ pointModule = myAsmBuilder->DefineDynamicModule( "PointModule",
 "Point.dll" );
   TypeBuilder^ pointTypeBld = pointModule->DefineType( "Point", TypeAttributes::Public
 );
   FieldBuilder^ xField = pointTypeBld->DefineField( "x", int::typeid,
 FieldAttributes::Public );
   FieldBuilder^ yField = pointTypeBld->DefineField( "y", int::typeid,
 FieldAttributes::Public );
   Type^ objType = Type::GetType( "System.Object" );
   ConstructorInfo^ objCtor = objType->GetConstructor( gcnew array<Type^>(0)
 );
   ConstructorBuilder^ pointCtor = pointTypeBld->DefineConstructor( MethodAttributes::Public,
 CallingConventions::Standard, ctorParams );
   ILGenerator^ ctorIL = pointCtor->GetILGenerator();
   
   // First, you build the constructor.
   ctorIL->Emit( OpCodes::Ldarg_0 );
   ctorIL->Emit( OpCodes::Call, objCtor );
   ctorIL->Emit( OpCodes::Ldarg_0 );
   ctorIL->Emit( OpCodes::Ldarg_1 );
   ctorIL->Emit( OpCodes::Stfld, xField );
   ctorIL->Emit( OpCodes::Ldarg_0 );
   ctorIL->Emit( OpCodes::Ldarg_2 );
   ctorIL->Emit( OpCodes::Stfld, yField );
   ctorIL->Emit( OpCodes::Ret );
   
   //  Now, you'll build a method to output some information on the
   // inside your dynamic class. This method will have the following
   // definition in C#:
   //  public void WritePoint()
   MethodBuilder^ writeStrMthd = pointTypeBld->DefineMethod( "WritePoint",
 MethodAttributes::Public, void::typeid, nullptr );
   ILGenerator^ writeStrIL = writeStrMthd->GetILGenerator();
   
   // The below ILGenerator created demonstrates a few ways to create
   // String* output through STDIN.
   // ILGenerator::EmitWriteLine(String*) will generate a ldstr and
 a
   // call to WriteLine for you.
   writeStrIL->EmitWriteLine( "The value of this current
 instance is:" );
   
   // Here, you will do the hard work yourself. First, you need to create
   // the String* we will be passing and obtain the correct WriteLine
 overload
   // for said String*. In the below case, you are substituting in two
 values,
   // so the chosen overload is Console::WriteLine(String*, Object*,
 Object*).
   String^ inStr = "( {0}, {1})";
   array<Type^>^wlParams = {String::typeid,Object::typeid,Object::typeid};
   
   // We need the MethodInfo to pass into EmitCall later.
   MethodInfo^ writeLineMI = Console::typeid->GetMethod( "WriteLine",
 wlParams );
   
   // Push the String* with the substitutions onto the stack.
   // This is the first argument for WriteLine - the String* one.
   writeStrIL->Emit( OpCodes::Ldstr, inStr );
   
   // Since the second argument is an Object*, and it corresponds to
   // to the substitution for the value of our integer field, you
   // need to box that field to an Object*. First, push a reference
   // to the current instance, and then push the value stored in
   // field 'x'. We need the reference to the current instance (stored
   // in local argument index 0) so Ldfld can load from the correct
   // instance (this one).
   writeStrIL->Emit( OpCodes::Ldarg_0 );
   writeStrIL->Emit( OpCodes::Ldfld, xField );
   
   // Now, we execute the box opcode, which pops the value of field
 'x',
   // returning a reference to the integer value boxed as an Object*.
   writeStrIL->Emit( OpCodes::Box, int::typeid );
   
   // Atop the stack, you'll find our String* inStr, followed by a reference
   // to the boxed value of 'x'. Now, you need to likewise box field
 'y'.
   writeStrIL->Emit( OpCodes::Ldarg_0 );
   writeStrIL->Emit( OpCodes::Ldfld, yField );
   writeStrIL->Emit( OpCodes::Box, int::typeid );
   
   // Now, you have all of the arguments for your call to
   // Console::WriteLine(String*, Object*, Object*) atop the stack:
   // the String* InStr, a reference to the boxed value of 'x', and
   // a reference to the boxed value of 'y'.
   // Call Console::WriteLine(String*, Object*, Object*) with EmitCall.
   writeStrIL->EmitCall( OpCodes::Call, writeLineMI, nullptr );
   
   // Lastly, EmitWriteLine can also output the value of a field
   // using the overload EmitWriteLine(FieldInfo).
   writeStrIL->EmitWriteLine( "The value of 'x' is:" );
   writeStrIL->EmitWriteLine( xField );
   writeStrIL->EmitWriteLine( "The value of 'y' is:" );
   writeStrIL->EmitWriteLine( yField );
   
   // Since we return no value (void), the the ret opcode will not
   // return the top stack value.
   writeStrIL->Emit( OpCodes::Ret );
   return pointTypeBld->CreateType();
}

int main()
{
   array<Object^>^ctorParams = gcnew array<Object^>(2);
   Console::Write( "Enter a integer value for X: " );
   String^ myX = Console::ReadLine();
   Console::Write( "Enter a integer value for Y: " );
   String^ myY = Console::ReadLine();
   Console::WriteLine( "---" );
   ctorParams[ 0 ] = Convert::ToInt32( myX );
   ctorParams[ 1 ] = Convert::ToInt32( myY );
   Type^ ptType = CreateDynamicType();
   Object^ ptInstance = Activator::CreateInstance( ptType, ctorParams );
   ptType->InvokeMember( "WritePoint", BindingFlags::InvokeMethod, nullptr,
 ptInstance, gcnew array<Object^>(0) );
}
J#
import System.*;
import System.Threading.*;
import System.Reflection.*;
import System.Reflection.Emit.*;

class EmitWriteLineDemo
{
    public static Type CreateDynamicType()
    {
        Type ctorParams[] = new Type[] { int.class.ToType(),
 
            int.class.ToType() };
        AppDomain myDomain = System.Threading.Thread.GetDomain();
        AssemblyName myAsmName = new AssemblyName();
        myAsmName.set_Name("MyDynamicAssembly");
        AssemblyBuilder myAsmBuilder = 
            myDomain.DefineDynamicAssembly(myAsmName,
            AssemblyBuilderAccess.RunAndSave);
        ModuleBuilder pointModule = myAsmBuilder.DefineDynamicModule(
            "PointModule", "Point.dll");
        TypeBuilder pointTypeBld = pointModule.DefineType("Point",
            TypeAttributes.Public);
        FieldBuilder xField = pointTypeBld.DefineField("x", int.class.ToType()
,
            FieldAttributes.Public);
        FieldBuilder yField = pointTypeBld.DefineField("y", int.class.ToType()
,
            FieldAttributes.Public);
        Type objType = Type.GetType("System.Object");
        ConstructorInfo objCtor = objType.GetConstructor(new Type[0]);
        ConstructorBuilder pointCtor = pointTypeBld.DefineConstructor
            (MethodAttributes.Public, CallingConventions.Standard, ctorParams);
        ILGenerator ctorIL = pointCtor.GetILGenerator();

        // First, you build the constructor.
        ctorIL.Emit(OpCodes.Ldarg_0);
        ctorIL.Emit(OpCodes.Call, objCtor);
        ctorIL.Emit(OpCodes.Ldarg_0);
        ctorIL.Emit(OpCodes.Ldarg_1);
        ctorIL.Emit(OpCodes.Stfld, xField);
        ctorIL.Emit(OpCodes.Ldarg_0);
        ctorIL.Emit(OpCodes.Ldarg_2);
        ctorIL.Emit(OpCodes.Stfld, yField);
        ctorIL.Emit(OpCodes.Ret);

        //  Now, you'll build a method to output some information on
 the
        // inside your dynamic class. This method will have the following
        // definition in VJ#:
        //  public void WritePoint()
        MethodBuilder writeStrMthd = pointTypeBld.DefineMethod("WritePoint"
,
            MethodAttributes.Public, void.class.ToType(),
 null);
        ILGenerator writeStrIL = writeStrMthd.GetILGenerator();

        // The below ILGenerator created demonstrates a few ways to
 create
        // string output through STDIN. 
        // ILGenerator.EmitWriteLine(string) will generate a ldstr and
 a 
        // call to WriteLine for you.
        writeStrIL.EmitWriteLine("The value of this current
 instance is:");

        // Here, you will do the hard work yourself. First, you need
 to create
        // the string we will be passing and obtain the correct WriteLine
        // overload for said string. In the below case, you are substituting
        // in two values, so the chosen overload is
        // Console.WriteLine(string, object, object).
        String inStr = "({0}, {1})";
        Type wlParams[] = new Type[] { String.class.ToType()
,
            Object.class.ToType(), Object.class.ToType()
 };

        // We need the MethodInfo to pass into EmitCall later.
        MethodInfo writeLineMI = Console.class.ToType().GetMethod("WriteLine"
,
            wlParams);

        // Push the string with the substitutions onto the stack.
        // This is the first argument for WriteLine - the string one.
 
        writeStrIL.Emit(OpCodes.Ldstr, inStr);

        // Since the second argument is an object, and it corresponds
 to
        // to the substitution for the value of our integer field, you
 
        // need to box that field to an object. First, push a reference
        // to the current instance, and then push the value stored in
        // field 'x'. We need the reference to the current instance
 (stored
        // in local argument index 0) so Ldfld can load from the correct
        // instance (this one).
        writeStrIL.Emit(OpCodes.Ldarg_0);
        writeStrIL.Emit(OpCodes.Ldfld, xField);

        // Now, we execute the box opcode, which pops the value of field
 'x',
        // returning a reference to the integer value boxed as an object.
        writeStrIL.Emit(OpCodes.Box, int.class.ToType());

        // Atop the stack, you'll find our string inStr, followed by
 a 
        // reference to the boxed value of 'x'. Now, you need to likewise
        // box field 'y'.
        writeStrIL.Emit(OpCodes.Ldarg_0);
        writeStrIL.Emit(OpCodes.Ldfld, yField);
        writeStrIL.Emit(OpCodes.Box, int.class.ToType());

        // Now, you have all of the arguments for your call to
        // Console.WriteLine(string, object, object) atop the stack:
        // the string InStr, a reference to the boxed value of 'x',
 and
        // a reference to the boxed value of 'y'.
        // Call Console.WriteLine(string, object, object) with EmitCall.
        writeStrIL.EmitCall(OpCodes.Call, writeLineMI, null);

        // Lastly, EmitWriteLine can also output the value of a field
        // using the overload EmitWriteLine(FieldInfo).
        writeStrIL.EmitWriteLine("The value of 'x' is:");
        writeStrIL.EmitWriteLine(xField);
        writeStrIL.EmitWriteLine("The value of 'y' is:");
        writeStrIL.EmitWriteLine(yField);

        // Since we return no value (void), the the ret opcode will
 not
        // return the top stack value.
        writeStrIL.Emit(OpCodes.Ret);
        return pointTypeBld.CreateType();
    } //CreateDynamicType
    
    public static void main(String[]
 args)
    {
        Object ctorParams[] = new Object[2];
        Console.Write("Enter a integer value for X: ");
        String myX = Console.ReadLine();
        Console.Write("Enter a integer value for Y: ");
        String myY = Console.ReadLine();
        Console.WriteLine("---");
        ctorParams[0] = (Int32)Integer.parseInt(myX);
        ctorParams[1] = (Int32)Integer.parseInt(myY);
        Type ptType = CreateDynamicType();
        Object ptInstance = Activator.CreateInstance(ptType, ctorParams);
        ptType.InvokeMember("WritePoint", BindingFlags.InvokeMethod, null
,
            ptInstance, new Object[0]);
    } //main
} //EmitWriteLineDemo
継承階層継承階層
System.Object
  System.Reflection.Emit.OpCodes
スレッド セーフスレッド セーフ
この型の public static (Visual Basic では Shared) メンバはすべて、スレッド セーフです。インスタンス メンバの場合は、スレッド セーフであるとは限りません。
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Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

開発プラットフォームの中には、.NET Framework によってサポートされていないバージョンがあります。サポートされているバージョンについては、「システム要件」を参照してください。

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.NET Framework
サポート対象 : 2.0、1.1、1.0
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関連項目
OpCodes メンバ
System.Reflection.Emit 名前空間

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「OpCodes クラス」の関連用語

1
ILGenerator.EmitCall メソッド
.NET Framework クラス ライブラリ リファレンス
90% |||||

2
ILGenerator.BeginFaultBlock メソッド
.NET Framework クラス ライブラリ リファレンス
76% |||||

3
ILGenerator.BeginFinallyBlock メソッド
.NET Framework クラス ライブラリ リファレンス
76% |||||

4
AssemblyBuilder.Save メソッド
.NET Framework クラス ライブラリ リファレンス
74% |||||

5
LocalBuilder.LocalType プロパティ
.NET Framework クラス ライブラリ リファレンス
70% |||||

6
ILGenerator.BeginScope メソッド
.NET Framework クラス ライブラリ リファレンス
58% |||||

7
ILGenerator.DeclareLocal メソッド
.NET Framework クラス ライブラリ リファレンス
58% |||||

8
ILGenerator.EndScope メソッド
.NET Framework クラス ライブラリ リファレンス
58% |||||

9
ILGenerator.Emit メソッド
.NET Framework クラス ライブラリ リファレンス
58% |||||

10
ILGenerator.MarkLabel メソッド
.NET Framework クラス ライブラリ リファレンス
58% |||||

OpCodes クラスのお隣キーワード

OpCode 構造体

OpCode.StackBehaviourPop プロパティ

OpCode.StackBehaviourPush プロパティ

OpCode.ToString メソッド

OpCode.Value プロパティ

OpCodeType 列挙体

OpCodes クラス

OpCodes フィールド

OpCodes メソッド

OpCodes メンバ

OpCodes.Stloc フィールド

OpCodes.Stloc_3 フィールド

OpCodes.Stloc_S フィールド

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