public void TestMethodImplementationFlags()
{
ConstructorBuilder cb = genClass.DefineConstructor(
0, 0, new Type [0]);
Assert.AreEqual(MethodImplAttributes.Managed | MethodImplAttributes.IL,
cb.GetMethodImplementationFlags(), "#A1");
cb.SetImplementationFlags(MethodImplAttributes.OPTIL);
Assert.AreEqual(MethodImplAttributes.OPTIL,
cb.GetMethodImplementationFlags(), "#A2");
// Can not be called on a created type
TypeBuilder tb = module.DefineType(genTypeName(), TypeAttributes.Public);
ConstructorBuilder cb2 = tb.DefineConstructor(
0, 0, new Type [0]);
cb2.GetILGenerator().Emit(OpCodes.Ret);
cb2.SetImplementationFlags(MethodImplAttributes.Managed);
tb.CreateType();
try {
cb2.SetImplementationFlags(MethodImplAttributes.OPTIL);
Assert.Fail("#B1");
} catch (InvalidOperationException ex) {
// Unable to change after type has been created
Assert.AreEqual(typeof(InvalidOperationException), ex.GetType(), "#B2");
Assert.IsNull(ex.InnerException, "#B3");
Assert.IsNotNull(ex.Message, "#B4");
}
}
/// <summary>
/// 发行。
/// </summary>
public void Emit(ConstructorBuilder builder)
{
#if NET40
var attributes = builder.GetMethodImplementationFlags();
#else
var attributes = builder.MethodImplementationFlags;
#endif
if ((attributes & MethodImplAttributes.Runtime) != MethodImplAttributes.IL)
{
return;
}
if (IsEmpty)
{
InvokeBaseConstructor();
}
foreach (var item in parameters)
{
item.Emit(builder.DefineParameter(item.Position, item.Attributes, item.ParameterName));
}
var ilg = builder.GetILGenerator();
base.Load(ilg);
ilg.Emit(OpCodes.Ret);
}
/// <summary>
/// 发行。
/// </summary>
internal void Emit(ConstructorBuilder builder)
{
#if NET40
var attributes = builder.GetMethodImplementationFlags();
#else
var attributes = builder.MethodImplementationFlags;
#endif
if ((attributes & MethodImplAttributes.Runtime) != MethodImplAttributes.IL)
{
return;
}
var ilg = builder.GetILGenerator();
base.Load(ilg);
ilg.Emit(OpCodes.Ret);
}
internal MyConstructorBuilder()
{
try
{
// <Snippet1>
MethodBuilder myMethodBuilder = null;
AppDomain myCurrentDomain = AppDomain.CurrentDomain;
// Create assembly in current CurrentDomain.
AssemblyName myAssemblyName = new AssemblyName();
myAssemblyName.Name = "TempAssembly";
// Create a dynamic assembly.
myAssemblyBuilder = myCurrentDomain.DefineDynamicAssembly
(myAssemblyName, AssemblyBuilderAccess.Run);
// Create a dynamic module in the assembly.
myModuleBuilder = myAssemblyBuilder.DefineDynamicModule("TempModule", true);
FieldInfo myFieldInfo2 =
myModuleBuilder.DefineUninitializedData("myField", 2, FieldAttributes.Public);
// Create a type in the module.
TypeBuilder myTypeBuilder = myModuleBuilder.DefineType("TempClass", TypeAttributes.Public);
FieldBuilder myGreetingField = myTypeBuilder.DefineField("Greeting",
typeof(String), FieldAttributes.Public);
Type[] myConstructorArgs = { typeof(String) };
// Define a constructor of the dynamic class.
ConstructorBuilder myConstructor = myTypeBuilder.DefineConstructor(
MethodAttributes.Public, CallingConventions.Standard, myConstructorArgs);
// Set the method implementation flags for the constructor.
myConstructor.SetImplementationFlags(MethodImplAttributes.PreserveSig | MethodImplAttributes.Runtime);
// Get the method implementation flags for the constructor.
MethodImplAttributes myMethodAttributes = myConstructor.GetMethodImplementationFlags();
Type myAttributeType = typeof(MethodImplAttributes);
int myAttribValue = (int)myMethodAttributes;
if (!myAttributeType.IsEnum)
{
Console.WriteLine("This is not an Enum");
}
// Display the field info names of the retrieved method implementation flags.
FieldInfo[] myFieldInfo = myAttributeType.GetFields(BindingFlags.Public | BindingFlags.Static);
Console.WriteLine("The Field info names of the MethodImplAttributes for the constructor are:");
for (int i = 0; i < myFieldInfo.Length; i++)
{
int myFieldValue = (Int32)myFieldInfo[i].GetValue(null);
if ((myFieldValue & myAttribValue) == myFieldValue)
{
Console.WriteLine(" " + myFieldInfo[i].Name);
}
}
// </Snippet1>
// Add a method to the type.
myMethodBuilder = myTypeBuilder.DefineMethod
("HelloWorld", MethodAttributes.Public, null, null);
// Generate IL for the method.
ILGenerator myILGenerator2 = myMethodBuilder.GetILGenerator();
myILGenerator2.EmitWriteLine("Hello World from global");
myILGenerator2.Emit(OpCodes.Ret);
myModuleBuilder.CreateGlobalFunctions();
myType1 = myTypeBuilder.CreateType();
}
catch (InvalidOperationException ex)
{
Console.WriteLine("The following exception has occurred : " + ex.Message);
}
catch (Exception ex)
{
Console.WriteLine("The following exception has occurred : " + ex.Message);
}
}
internal MyConstructorBuilder()
{
// <Snippet1>
// <Snippet3>
MethodBuilder myMethodBuilder = null;
AppDomain myCurrentDomain = AppDomain.CurrentDomain;
// Create assembly in current CurrentDomain.
AssemblyName myAssemblyName = new AssemblyName();
myAssemblyName.Name = "TempAssembly";
// Create a dynamic assembly.
myAssemblyBuilder = myCurrentDomain.DefineDynamicAssembly
(myAssemblyName, AssemblyBuilderAccess.Run);
// Create a dynamic module in the assembly.
myModuleBuilder = myAssemblyBuilder.DefineDynamicModule("TempModule");
// Create a type in the module.
TypeBuilder myTypeBuilder = myModuleBuilder.DefineType("TempClass", TypeAttributes.Public);
FieldBuilder myGreetingField = myTypeBuilder.DefineField("Greeting",
typeof(String), FieldAttributes.Public);
Type[] myConstructorArgs = { typeof(String) };
// <Snippet2>
// <Snippet4>
// Define a constructor of the dynamic class.
ConstructorBuilder myConstructorBuilder = myTypeBuilder.DefineConstructor(
MethodAttributes.Public, CallingConventions.Standard, myConstructorArgs);
// Get a reference to the module that contains this constructor.
Module myModule = myConstructorBuilder.GetModule();
Console.WriteLine("Module Name : " + myModule.Name);
// Get the 'MethodToken' that represents the token for this constructor.
MethodToken myMethodToken = myConstructorBuilder.GetToken();
Console.WriteLine("Constructor Token is : " + myMethodToken.Token);
// Get the method implementation flags for this constructor.
MethodImplAttributes myMethodImplAttributes = myConstructorBuilder.GetMethodImplementationFlags();
Console.WriteLine("MethodImplAttributes : " + myMethodImplAttributes);
// </Snippet3>
// </Snippet2>
// </Snippet1>
// Generate IL for the method, call its base class constructor and store the arguments
// in the private field.
ILGenerator myILGenerator3 = myConstructorBuilder.GetILGenerator();
myILGenerator3.Emit(OpCodes.Ldarg_0);
ConstructorInfo myConstructorInfo = typeof(Object).GetConstructor(new Type[0]);
myILGenerator3.Emit(OpCodes.Call, myConstructorInfo);
myILGenerator3.Emit(OpCodes.Ldarg_0);
myILGenerator3.Emit(OpCodes.Ldarg_1);
myILGenerator3.Emit(OpCodes.Stfld, myGreetingField);
myILGenerator3.Emit(OpCodes.Ret);
// Add a method to the type.
myMethodBuilder = myTypeBuilder.DefineMethod
("HelloWorld", MethodAttributes.Public, null, null);
// Generate IL for the method.
ILGenerator myILGenerator2 = myMethodBuilder.GetILGenerator();
myILGenerator2.EmitWriteLine("Hello World from global");
myILGenerator2.Emit(OpCodes.Ret);
myModuleBuilder.CreateGlobalFunctions();
myType1 = myTypeBuilder.CreateType();
// Get the parameters of this constructor.
ParameterInfo[] myParameterInfo = myConstructorBuilder.GetParameters();
for (int i = 0; i < myParameterInfo.Length; i++)
{
Console.WriteLine("Declaration type : " + myParameterInfo[i].Member.DeclaringType);
}
// </Snippet4>
}
