private void HandleReturnType(bool baseIsAbstractClass, TypeDefinition baseDefinition,
MethodDefinition deepCopyMethod)
{
// Use the return type defined on the base method we're overriding (if applicable).
if (!baseIsAbstractClass)
return;
// if (baseDefinition.TryGetMethod(this._deepCopyMethodName, out interCopy))
// {
// if (interCopy.IsVirtual)
// deepCopyMethod.Overrides.Add(interCopy);
// }
// Update the return type to match the one that we're supposed to override.
MethodDefinition baseTypeDeepCopyMethod;
if (baseDefinition.TryGetMethod(this._deepCopyMethodName, out baseTypeDeepCopyMethod))
deepCopyMethod.ReturnType = baseTypeDeepCopyMethod.ReturnType;
}
private void HandlePotentialAbstractOverride(bool baseIsAbstractClass, TypeDefinition baseDefinition,
ref MethodAttributes methodAttributes)
{
if (!baseIsAbstractClass)
return;
// Get the deep copy method on the base type.
MethodDefinition baseTypeDeepCopyMethod;
if (!baseDefinition.TryGetMethod(this._deepCopyMethodName, out baseTypeDeepCopyMethod))
return;
// Is the deep copy method on the base type marked as 'override'?
if (baseTypeDeepCopyMethod.IsVirtual)
methodAttributes |= MethodAttributes.Virtual;
}
private void SafeCallDeepCopy(
Collection<VariableDefinition> variables,
Collection<ExceptionHandler> exceptionHandlers,
Collection<Instruction> instructions,
TypeDefinition typeDefinition,
Action<Collection<Instruction>> load,
Action<Collection<Instruction>> store)
{
MethodDefinition deepCopy;
if (!typeDefinition.TryGetMethod(this._deepCopyMethodName, out deepCopy))
throw new Exception(
String.Format("Sub-type {0} does not implement DeepCopy.", typeDefinition.FullName));
var var0 = variables.AddV(typeDefinition);
// Load the object, and check to see if it's null.
instructions.AddI(OpCodes.Nop);
instructions.AddI(OpCodes.Ldarg_0);
load(instructions);
instructions.AddI(OpCodes.Stloc, var0);
instructions.AddI(OpCodes.Ldloc_0);
instructions.AddI(OpCodes.Ldloc, var0);
var loadNull = Instruction.Create(OpCodes.Ldnull);
instructions.AddI(OpCodes.Brfalse_S, loadNull);
instructions.AddI(OpCodes.Ldloc, var0);
instructions.AddI(OpCodes.Callvirt, deepCopy);
var noOp = Instruction.Create(OpCodes.Nop);
instructions.AddI(OpCodes.Br_S, noOp);
instructions.Add(loadNull);
instructions.Add(noOp);
store(instructions);
}
