/// <summary>
/// Builds the type initializer.
/// </summary>
/// <param name="typeBuilder">The type builder.</param>
/// <param name="methodInfo">The method information.</param>
/// <param name="genericParameterTypes">The generic parameter types.</param>
/// <param name="methodFieldInfo">The method information static field information.</param>
private static void BuildTypeInitializer(TypeBuilder typeBuilder,
MethodInfo methodInfo,
Type[] genericParameterTypes,
FieldInfo methodFieldInfo)
{
// Define type initializer.
var typeInitializer = typeBuilder.DefineConstructor(
MethodAttributes.Private | MethodAttributes.Static | MethodAttributes.SpecialName,
CallingConventions.Standard,
null);
// Implement type initializer.
var ilGenerator = typeInitializer.GetILGenerator();
// Get and load target method information.
var targetMethodInfo = methodInfo.MapGenericMethod(genericParameterTypes);
var declaringType = targetMethodInfo.DeclaringType;
ilGenerator.Emit(OpCodes.Ldtoken, targetMethodInfo);
ilGenerator.Emit(OpCodes.Ldtoken, declaringType);
ilGenerator.EmitCall(MethodBaseGetMethodFromHandleMethodInfo);
// Store method information.
ilGenerator.Emit(OpCodes.Castclass, typeof (MethodInfo));
ilGenerator.Emit(OpCodes.Stsfld, methodFieldInfo);
ilGenerator.Emit(OpCodes.Ret);
}
/// <summary>
/// Builds the invoke method.
/// </summary>
/// <param name="typeBuilder">The type builder.</param>
/// <param name="methodInfo">The method information.</param>
/// <param name="genericParameterTypes">The generic parameter types.</param>
/// <param name="isVirtual">A value indicating whether the method should be called virtually.</param>
private static void BuildInvokeMethod(TypeBuilder typeBuilder, MethodInfo methodInfo, Type[] genericParameterTypes, bool isVirtual)
{
var invokeMethodInfo = isVirtual ? MethodInfoBaseInvokeVirtualMethodInfo : MethodInfoBaseInvokeBaseMethodInfo;
// Define method.
var methodBuilder = typeBuilder.DefineMethod(invokeMethodInfo, false, true);
methodBuilder.DefineParameters(invokeMethodInfo);
// Implement method.
var ilGenerator = methodBuilder.GetILGenerator();
// Load target object.
ilGenerator.Emit(OpCodes.Ldarg_1);
// Load parameter values.
var parameterTypes = methodInfo.MapGenericParameterTypes(genericParameterTypes);
var parameterValueLocalBuilders = new LocalBuilder[parameterTypes.Length];
LoadParameterValues(ilGenerator, 2, parameterTypes, parameterValueLocalBuilders);
// Call target method.
var targetMethodInfo = methodInfo.MapGenericMethod(genericParameterTypes);
ilGenerator.Emit(isVirtual ? OpCodes.Callvirt : OpCodes.Call, targetMethodInfo);
// Restore by reference parameter values.
RestoreByReferenceParameterValues(ilGenerator, 2, parameterTypes, parameterValueLocalBuilders);
// Handle return value.
var returnType = methodInfo.MapGenericReturnType(genericParameterTypes);
if (returnType.IsVoid())
ilGenerator.Emit(OpCodes.Ldnull);
else
ilGenerator.EmitBox(returnType);
ilGenerator.Emit(OpCodes.Ret);
}
