GenericTypeParameterBuilder.MakePointerType Méthode
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Retourne un objet Type qui représente un pointeur vers le paramètre de type générique actuel.
public:
override Type ^ MakePointerType();
public override Type MakePointerType ();
override this.MakePointerType : unit -> Type
Public Overrides Function MakePointerType () As Type
Objet Type qui représente un pointeur vers le paramètre de type générique actuel.
L’exemple de code suivant crée un module dynamique, un type générique abstrait nommé Sample
avec un paramètre de type , T
et une méthode abstraite nommée TestMethod
.
TestMethod
prend un ref
paramètre (ByRef
en Visual Basic) de type T
, un pointeur vers le type T
et un tableau de T
. Cette méthode retourne un tableau à deux dimensions de T
. L’exemple de code enregistre le module dynamique sur le disque afin que vous puissiez l’examiner à l’aide du désassembleur MSIL (Ildasm.exe).
using namespace System;
using namespace System::Reflection;
using namespace System::Reflection::Emit;
int 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^ appDomain = AppDomain::CurrentDomain;
AssemblyName^ assemblyName = gcnew
AssemblyName("MakeXxxGenericTypeParameterExample");
AssemblyBuilder^ assemblyBuilder = appDomain->DefineDynamicAssembly
(assemblyName, 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^ moduleBuilder = assemblyBuilder->DefineDynamicModule
(assemblyName->Name, assemblyName->Name + ".dll");
// Define the sample type.
TypeBuilder^ typeBuilder = moduleBuilder->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.
array<String^>^ typeParamNames = {"T"};
array<GenericTypeParameterBuilder^>^ typeParams =
typeBuilder->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 repre-
// sent the parameter types and the return type. Use the
// MakeByRefType, MakePointerType, and MakeArrayType methods
// to create the Type objects, using the generic type para-
// meter 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.
array<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^ methodBuilder = typeBuilder->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.
//
typeBuilder->CreateType();
assemblyBuilder->Save(assemblyName->Name + ".dll");
};
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
La MakePointerType méthode permet de générer des types de pointeurs pour les listes de paramètres.
Produit | Versions |
---|---|
.NET | Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9 |
.NET Framework | 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
.NET Standard | 2.0 (package-provided), 2.1 |
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