void OverflowIntoParams(List<Argument> arguments, ParameterInfo[] parameters)
{
if (arguments.Count == 0 || parameters.Length == 0)
return;
var overflowingArgs = arguments.Skip(parameters.Length - 1).ToList();
var lastParam = parameters.Last();
if (overflowingArgs.Count == 1 && overflowingArgs[0].Type == lastParam.ParameterType)
return;
Expr argExpr;
if (lastParam.IsParams())
{
var elementType = lastParam.ParameterType.GetElementType();
if (overflowingArgs.Any(arg => arg.Type != elementType && !arg.Type.IsSubclassOf(elementType)))
return;
argExpr = Expr.NewArrayInit(
elementType,
overflowingArgs.Select(arg => Expr.Convert(arg.Expression, elementType)));
}
else if (lastParam.ParameterType == typeof(Varargs))
{
argExpr = Expr.New(
MemberInfos.NewVarargs,
Expr.NewArrayInit(
typeof(object),
overflowingArgs.Select(arg => Expr.Convert(arg.Expression, typeof(object)))));
}
else
{
return;
}
arguments.RemoveRange(arguments.Count - overflowingArgs.Count, overflowingArgs.Count);
arguments.Add(new Argument(argExpr, lastParam.ParameterType));
}
private void EmitMethodWithParameterCombo(int thissIdx, MethodInfo realMethod, Type[] parameters, MethodBuilder methodBuilder, ParameterInfo[] realParams)
{
var gen = methodBuilder.GetILGenerator();
if (!realMethod.IsStatic)
{
// Set 'this' to the result of JishProxy.GetInstance. This allows one
// class to proxy to methods from different source classes.
SetReferenceToAppropriateThis(gen, thissIdx);
}
for (int i = 0; i < parameters.Length; i++)
{
if (IsParamsArray(realParams[i]))
{
break; // Break as this is the last parameter (params must always be last)
}
// if (IsParamDelegate(realParams[i])) // TODO: This is in the wrong place
// {
// If the param is a delegate it needs to be replaced with a string which
// will be used to find the 'real' delegate in the jish_internal scope.
// }
// Else add standard inline arg
gen.Emit(OpCodes.Ldarg, i + 1);
}
for (int i = parameters.Count(); i < realParams.Length; i++)
{
if (IsParamsArray(realParams[i])) break;
gen.Emit(OpCodes.Ldarg_0);
gen.Emit(OpCodes.Ldc_I4, thissIdx); // Load the this index into the stack for GetInstance param
gen.Emit(OpCodes.Ldc_I4, i);
MethodInfo getLastOptional = typeof (JishProxy).GetMethod("GetOptionalParameterDefaultValue");
getLastOptional = getLastOptional.MakeGenericMethod(new[] {realParams[i].ParameterType});
gen.Emit(OpCodes.Callvirt, getLastOptional);
}
ParameterInfo last = realParams.Any() ? realParams.Last() : null;
if (last != null && IsParamsArray(last))
{
CovertRemainingParametersToArray(parameters, gen, realParams.Count() - 1, last.ParameterType.GetElementType());
}
// Call the real method
gen.Emit(realMethod.IsStatic ? OpCodes.Call : OpCodes.Callvirt, realMethod);
gen.Emit(OpCodes.Ret);
}