protected override Func <object, bool> BuildReadOnly()
{
var p_obj = Expression.Parameter(typeof(object));
Expression access = Expression.MakeMemberAccess(Expression.Convert(p_obj, ObjectType), MemberInfo);
Expression readOnly = Expression.MakeMemberAccess(access, MemberType.GetProperty("IsReadOnly"));
return(Expression.Lambda <Func <object, bool> >(readOnly, p_obj).Compile());
}
private Expression BuildArrayAccess(ParameterExpression p_obj, ParameterExpression p_index)
{
var obj = Expression.Convert(p_obj, ObjectType);
Expression access = Expression.MakeMemberAccess(obj, MemberInfo);
var length = MemberType.GetProperty("Length");
var indexer = Expression.Condition(
Expression.Or(
Expression.LessThan(
p_index, Expression.Constant(0)),
Expression.GreaterThanOrEqual(
p_index,
Expression.MakeMemberAccess(access, length)
)
), Expression.Constant(0), p_index);
return(Expression.ArrayAccess(access, indexer));
}
