protected override Expression BuildCtorExpression(ExpressionBuilderArgs args)
{
var elementType = MemberType.GetElementType();
var lengthVar = Expression.Variable(typeof(UInt64), "length");
var ctorExp = Expression.NewArrayBounds(
elementType,
lengthVar);
return(Expression.Block(new [] { lengthVar },
Expression.Assign(lengthVar, Invoke(_length, args)),
AdvancedExpression.Debug(string.Format("Array {0} initialized. ({{0}} elements).", MemberName), lengthVar),
ctorExp));
}
protected override Func <object, int, int, T> BuildGetter()
{
var p_obj = Expression.Parameter(typeof(object));
var p_i1 = Expression.Parameter(typeof(int));
var p_i2 = Expression.Parameter(typeof(int));
var elementType = MemberType.GetElementType();
Expression arrayAccess = BuildArrayAccess(p_obj, p_i2);
return(Expression.Lambda <Func <object, int, int, T> >(
ValueType.IsAssignableFrom(elementType) ?
arrayAccess : Expression.Convert(arrayAccess, ValueType),
p_obj, p_i1, p_i2
).Compile());
}
protected override Action <object, int, int, T> BuildSetter()
{
var p_obj = Expression.Parameter(typeof(object));
var p_i1 = Expression.Parameter(typeof(int));
var p_i2 = Expression.Parameter(typeof(int));
var p_val = Expression.Parameter(ValueType);
var elementType = MemberType.GetElementType();
Expression param = p_val;
var arrayAccess = BuildArrayAccess(p_obj, p_i2);
return(Expression.Lambda <Action <object, int, int, T> >(
Expression.Assign(
arrayAccess,
elementType.IsAssignableFrom(ValueType) ?
param : Expression.Convert(p_val, elementType)
),
p_obj, p_i1, p_i2, p_val
).Compile());
}
protected override Expression BuildBodyExpression(ExpressionBuilderArgs args, ParameterExpression innerResultVar, ParameterExpression typeVar)
{
var elementType = MemberType.GetElementType();
if (elementType == typeof(Byte))
{
return(Expression.Call(
args.BrParameter,
"ReadBits",
null,
Expression.New(
typeof(BinarySize).GetConstructor(new[] { typeof(UInt64), typeof(Byte) }),
Invoke(_length, args),
Expression.Constant((Byte)0, typeof(Byte))),
Expression.Constant(null, typeof(Endianness?))));
}
else
{
return(base.BuildBodyExpression(args, innerResultVar, typeVar));
}
}
public ArrayMember(string name, Type type)
: base(name, type)
{
_elementType = MemberType.GetElementType();
_newLength = -1;
}