GenericTypeParameterBuilder.MakePointerType Methode
Definitie
Belangrijk
Bepaalde informatie heeft betrekking op een voorlopige productversie die aanzienlijk kan worden gewijzigd voordat deze wordt uitgebracht. Microsoft biedt geen enkele expliciete of impliciete garanties met betrekking tot de informatie die hier wordt verstrekt.
Retourneert een Type object dat een aanwijzer vertegenwoordigt naar de huidige algemene typeparameter.
public:
override Type ^ MakePointerType();public override Type MakePointerType();override this.MakePointerType : unit -> TypePublic Overrides Function MakePointerType () As TypeRetouren
Een Type object dat een aanwijzer vertegenwoordigt naar de huidige algemene typeparameter.
Voorbeelden
In het volgende codevoorbeeld wordt een dynamische module gemaakt, een abstract algemeen type met Sample één typeparameter Ten een abstracte methode met de naam TestMethod.
TestMethod gebruikt een parameter ref (ByRef in Visual Basic) van het type T, een aanwijzer om T en een matrix van T te typen. Deze methode retourneert een tweedimensionale matrix van T. In het codevoorbeeld wordt de dynamische module op schijf opgeslagen, zodat u deze kunt onderzoeken met behulp van de MSIL-demonteerfunctie (Ildasm.exe).
using System;
using System.Reflection;
using System.Reflection.Emit;
using Microsoft.VisualBasic;
public class Example
{
public static void Main()
{
// Define a dynamic assembly to contain the sample type. The
// assembly will not be run, but only saved to disk, so
// AssemblyBuilderAccess.Save is specified.
//
AppDomain myDomain = AppDomain.CurrentDomain;
AssemblyName myAsmName = new
AssemblyName("MakeXxxGenericTypeParameterExample");
AssemblyBuilder myAssembly = myDomain.DefineDynamicAssembly(
myAsmName, AssemblyBuilderAccess.Save);
// An assembly is made up of executable modules. For a single-
// module assembly, the module name and file name are the same
// as the assembly name.
//
ModuleBuilder myModule = myAssembly.DefineDynamicModule(
myAsmName.Name, myAsmName.Name + ".dll");
// Define the sample type.
TypeBuilder myType = myModule.DefineType("Sample",
TypeAttributes.Public | TypeAttributes.Abstract);
// Make the sample type a generic type, by defining a type
// parameter T. All type parameters are defined at the same
// time, by passing an array containing the type parameter
// names.
string[] typeParamNames = {"T"};
GenericTypeParameterBuilder[] typeParams =
myType.DefineGenericParameters(typeParamNames);
// Define a method that takes a ByRef argument of type T, a
// pointer to type T, and one-dimensional array of type T. The
// method returns a two-dimensional array of type T.
//
// To create this method, you need Type objects that represent the
// parameter types and the return type. Use the MakeByRefType,
// MakePointerType, and MakeArrayType methods to create the Type
// objects, using the generic type parameter T.
//
Type byRefType = typeParams[0].MakeByRefType();
Type pointerType = typeParams[0].MakePointerType();
Type arrayType = typeParams[0].MakeArrayType();
Type twoDimArrayType = typeParams[0].MakeArrayType(2);
// Create the array of parameter types.
Type[] parameterTypes = {byRefType, pointerType, arrayType};
// Define the abstract Test method. After you have compiled
// and run this example code, you can use ildasm.exe to open
// MakeXxxGenericTypeParameterExample.dll, examine the Sample
// type, and verify the parameter types and return type of
// the TestMethod method.
//
MethodBuilder myMethodBuilder = myType.DefineMethod(
"TestMethod",
MethodAttributes.Abstract | MethodAttributes.Virtual
| MethodAttributes.Public,
twoDimArrayType,
parameterTypes);
// Create the type and save the assembly. For a single-file
// assembly, there is only one module to store the manifest
// information in.
//
myType.CreateType();
myAssembly.Save(myAsmName.Name + ".dll");
}
}
Imports System.Reflection
Imports System.Reflection.Emit
Public Class Example
Public Shared Sub Main()
' Define a dynamic assembly to contain the sample type. The
' assembly will not be run, but only saved to disk, so
' AssemblyBuilderAccess.Save is specified.
'
Dim myDomain As AppDomain = AppDomain.CurrentDomain
Dim myAsmName As New AssemblyName("MakeXxxGenericTypeParameterExample")
Dim myAssembly As AssemblyBuilder = myDomain.DefineDynamicAssembly( _
myAsmName, _
AssemblyBuilderAccess.Save)
' An assembly is made up of executable modules. For a single-
' module assembly, the module name and file name are the same
' as the assembly name.
'
Dim myModule As ModuleBuilder = myAssembly.DefineDynamicModule( _
myAsmName.Name, _
myAsmName.Name & ".dll")
' Define the sample type.
Dim myType As TypeBuilder = myModule.DefineType( _
"Sample", _
TypeAttributes.Public Or TypeAttributes.Abstract)
' Make the sample type a generic type, by defining a type
' parameter T. All type parameters are defined at the same
' time, by passing an array containing the type parameter
' names.
Dim typeParamNames() As String = {"T"}
Dim typeParams() As GenericTypeParameterBuilder = _
myType.DefineGenericParameters(typeParamNames)
' Define a method that takes a ByRef argument of type T, a
' pointer to type T, and one-dimensional array of type T. The
' method returns a two-dimensional array of type T.
'
' To create this method, you need Type objects that represent the
' parameter types and the return type. Use the MakeByRefType,
' MakePointerType, and MakeArrayType methods to create the Type
' objects, using the generic type parameter T.
'
Dim byRefType As Type = typeParams(0).MakeByRefType
Dim pointerType As Type = typeParams(0).MakePointerType
Dim arrayType As Type = typeParams(0).MakeArrayType
Dim twoDimArrayType As Type = typeParams(0).MakeArrayType(2)
' Create the array of parameter types.
Dim parameterTypes() As Type = _
{byRefType, pointerType, arrayType}
' Define the abstract Test method. After you have compiled
' and run this example code, you can use ildasm.exe to open
' MakeXxxGenericTypeParameterExample.dll, examine the Sample
' type, and verify the parameter types and return type of
' the TestMethod method.
'
Dim myMethodBuilder As MethodBuilder = myType.DefineMethod( _
"TestMethod", _
MethodAttributes.Abstract Or MethodAttributes.Virtual _
Or MethodAttributes.Public, _
twoDimArrayType, _
parameterTypes)
' Create the type and save the assembly. For a single-file
' assembly, there is only one module to store the manifest
' information in.
'
myType.CreateType()
myAssembly.Save(myAsmName.Name & ".dll")
End Sub
End Class
Opmerkingen
De MakePointerType methode biedt een manier om aanwijzertypen te genereren voor parameterlijsten.