public override DynamicMetaObject FallbackSetMember(DynamicMetaObject target, DynamicMetaObject value, DynamicMetaObject errorSuggestion)
{
if (target == null)
{
throw new ArgumentNullException(nameof(target));
}
if (value == null)
{
throw new ArgumentNullException(nameof(target));
}
if (!target.HasValue || !value.HasValue)
{
return(Defer(target, value));
}
if (target.Value == null)
{
return(BinderHelper.NullTargetResult(target, errorSuggestion));
}
if (value.Value == null)
{
return(BinderHelper.SetNullValue(this, value));
}
var memberAccess = _memberResolver.MemberExpression(Name, target, MemberAccessMode.Write);
var restrictions = BinderHelper.CreateCommonRestrictions(target);
if (memberAccess == null || !memberAccess.Type.IsAssignableFrom(value.RuntimeType))
{
BindingEventSource.Log.SetMemberResolutionFailure(Name, target.RuntimeType.FullName, value.RuntimeType.FullName);
return(BinderHelper.UnresolveableResult(restrictions, errorSuggestion));
}
var result = VelocityExpressions.BoxIfNeeded(
Expression.Assign(
memberAccess,
VelocityExpressions.ConvertIfNeeded(value, memberAccess.Type)
)
);
return(new DynamicMetaObject(result, restrictions));
}
public override DynamicMetaObject FallbackSetIndex(DynamicMetaObject target, DynamicMetaObject[] indexes, DynamicMetaObject value, DynamicMetaObject errorSuggestion)
{
if (target == null)
{
throw new ArgumentNullException(nameof(target));
}
if (indexes == null)
{
throw new ArgumentNullException(nameof(indexes));
}
if (indexes == null)
{
throw new ArgumentNullException(nameof(indexes));
}
if (!target.HasValue || !value.HasValue || indexes.Any(x => !x.HasValue))
{
return(Defer(target, indexes.Concat(new[] { value }).ToArray()));
}
if (target.Value == null)
{
return(BinderHelper.NullTargetResult(target, errorSuggestion));
}
if (value.Value == null)
{
return(BinderHelper.SetNullValue(this, value));
}
var restrictions = BinderHelper.CreateCommonRestrictions(target, indexes)
.Merge(BinderHelper.CreateCommonRestrictions(value));
var index = _indexerResolver.WriteableIndexer(target, indexes);
if (index == null || !index.Type.IsAssignableFrom(value.RuntimeType))
{
return(BinderHelper.UnresolveableResult(restrictions, errorSuggestion));
}
var assignment = Expression.Assign(index, VelocityExpressions.ConvertIfNeeded(value.Expression, index.Type));
return(new DynamicMetaObject(VelocityExpressions.ConvertIfNeeded(assignment, ReturnType), restrictions));
}