protected virtual void ImplementInvokeMethodOnTarget(AbstractTypeEmitter invocation, ParameterInfo[] parameters,
MethodEmitter invokeMethodOnTarget,
Reference targetField)
{
var callbackMethod = GetCallbackMethod(invocation);
if (callbackMethod == null)
{
EmitCallThrowOnNoTarget(invokeMethodOnTarget);
return;
}
var args = new IExpression[parameters.Length];
// Idea: instead of grab parameters one by one
// we should grab an array
var byRefArguments = new Dictionary <int, LocalReference>();
for (var i = 0; i < parameters.Length; i++)
{
var param = parameters[i];
var paramType = invocation.GetClosedParameterType(param.ParameterType);
if (paramType.IsByRef)
{
var localReference = invokeMethodOnTarget.CodeBuilder.DeclareLocal(paramType.GetElementType());
invokeMethodOnTarget.CodeBuilder
.AddStatement(
new AssignStatement(localReference,
new ConvertExpression(paramType.GetElementType(),
new MethodInvocationExpression(SelfReference.Self,
InvocationMethods.GetArgumentValue,
new LiteralIntExpression(i)))));
var byRefReference = new ByRefReference(localReference);
args[i] = byRefReference;
byRefArguments[i] = localReference;
}
else
{
args[i] =
new ConvertExpression(paramType,
new MethodInvocationExpression(SelfReference.Self,
InvocationMethods.GetArgumentValue,
new LiteralIntExpression(i)));
}
}
if (byRefArguments.Count > 0)
{
invokeMethodOnTarget.CodeBuilder.AddStatement(new TryStatement());
}
var methodOnTargetInvocationExpression = GetCallbackMethodInvocation(invocation, args, callbackMethod, targetField, invokeMethodOnTarget);
LocalReference returnValue = null;
if (callbackMethod.ReturnType != typeof(void))
{
var returnType = invocation.GetClosedParameterType(callbackMethod.ReturnType);
returnValue = invokeMethodOnTarget.CodeBuilder.DeclareLocal(returnType);
invokeMethodOnTarget.CodeBuilder.AddStatement(new AssignStatement(returnValue, methodOnTargetInvocationExpression));
}
else
{
invokeMethodOnTarget.CodeBuilder.AddStatement(methodOnTargetInvocationExpression);
}
AssignBackByRefArguments(invokeMethodOnTarget, byRefArguments);
if (callbackMethod.ReturnType != typeof(void))
{
var setRetVal =
new MethodInvocationExpression(SelfReference.Self,
InvocationMethods.SetReturnValue,
new ConvertExpression(typeof(object), returnValue.Type, returnValue));
invokeMethodOnTarget.CodeBuilder.AddStatement(setRetVal);
}
invokeMethodOnTarget.CodeBuilder.AddStatement(new ReturnStatement());
}
protected virtual void ImplementInvokeMethodOnTarget(AbstractTypeEmitter invocation, ParameterInfo[] parameters,
MethodEmitter invokeMethodOnTarget,
Reference targetField)
{
var callbackMethod = GetCallbackMethod(invocation);
if (callbackMethod == null)
{
EmitCallThrowOnNoTarget(invokeMethodOnTarget);
return;
}
if (canChangeTarget)
{
EmitCallEnsureValidTarget(invokeMethodOnTarget);
}
Expression[] args = new Expression[parameters.Length];
// Idea: instead of grab parameters one by one
// we should grab an array
Dictionary <int, LocalReference> byRefArguments = new Dictionary <int, LocalReference>();
for (int i = 0; i < parameters.Length; i++)
{
ParameterInfo param = parameters[i];
Type paramType = invocation.GetClosedParameterType(param.ParameterType);
if (paramType.IsByRef)
{
LocalReference localReference = invokeMethodOnTarget.CodeBuilder.DeclareLocal(paramType.GetElementType());
invokeMethodOnTarget.CodeBuilder
.AddStatement(
new AssignStatement(localReference,
new ConvertExpression(paramType.GetElementType(),
new MethodInvocationExpression(SelfReference.Self,
InvocationMethods.GetArgumentValue,
new LiteralIntExpression(i)))));
ByRefReference byRefReference = new ByRefReference(localReference);
args[i] = new ReferenceExpression(byRefReference);
byRefArguments[i] = localReference;
}
else
{
args[i] =
new ConvertExpression(paramType,
new MethodInvocationExpression(SelfReference.Self,
InvocationMethods.GetArgumentValue,
new LiteralIntExpression(i)));
}
}
var methodOnTargetInvocationExpression = GetCallbackMethodInvocation(invocation, args, callbackMethod, targetField,
invokeMethodOnTarget);
LocalReference returnValue = null;
if (callbackMethod.ReturnType != typeof(void))
{
Type returnType = invocation.GetClosedParameterType(callbackMethod.ReturnType);
returnValue = invokeMethodOnTarget.CodeBuilder.DeclareLocal(returnType);
invokeMethodOnTarget.CodeBuilder.AddStatement(new AssignStatement(returnValue, methodOnTargetInvocationExpression));
}
else
{
invokeMethodOnTarget.CodeBuilder.AddStatement(new ExpressionStatement(methodOnTargetInvocationExpression));
}
foreach (KeyValuePair <int, LocalReference> byRefArgument in byRefArguments)
{
int index = byRefArgument.Key;
LocalReference localReference = byRefArgument.Value;
invokeMethodOnTarget.CodeBuilder.AddStatement(
new ExpressionStatement(
new MethodInvocationExpression(SelfReference.Self,
InvocationMethods.SetArgumentValue,
new LiteralIntExpression(index),
new ConvertExpression(typeof(object),
localReference.
Type,
new ReferenceExpression
(localReference)))
));
}
if (callbackMethod.ReturnType != typeof(void))
{
var setRetVal =
new MethodInvocationExpression(SelfReference.Self,
InvocationMethods.SetReturnValue,
new ConvertExpression(typeof(object), returnValue.Type, returnValue.ToExpression()));
invokeMethodOnTarget.CodeBuilder.AddStatement(new ExpressionStatement(setRetVal));
}
invokeMethodOnTarget.CodeBuilder.AddStatement(new ReturnStatement());
}