public override DynamicMetaObject Bind(DynamicMetaObject target, params DynamicMetaObject[] args)
{
args = ArrayUtils.Insert(target, args);
List <DynamicMetaObject> results = new List <DynamicMetaObject>(_metaBinders.Length);
List <Expression> steps = new List <Expression>();
List <ParameterExpression> temps = new List <ParameterExpression>();
BindingRestrictions restrictions = BindingRestrictions.Empty;
for (int i = 0; i < _metaBinders.Length; i++)
{
BinderMappingInfo curBinder = _metaBinders[i];
DynamicMetaObject[] tmpargs = GetArguments(args, results, i);
DynamicMetaObject next = curBinder.Binder.Bind(tmpargs[0], ArrayUtils.RemoveFirst(tmpargs));
if (i != 0)
{
// If the rule contains an embedded "update", replace it with a defer
var visitor = new ReplaceUpdateVisitor {
Binder = curBinder.Binder, Arguments = tmpargs
};
next = new DynamicMetaObject(visitor.Visit(next.Expression), next.Restrictions);
}
restrictions = restrictions.Merge(next.Restrictions);
if (next.Expression.NodeType == ExpressionType.Throw)
{
// end of the line... the expression is throwing, none of the other
// binders will have an opportunity to run.
steps.Add(next.Expression);
break;
}
ParameterExpression tmp = Expression.Variable(next.Expression.Type, "comboTemp" + i.ToString());
temps.Add(tmp);
steps.Add(Expression.Assign(tmp, next.Expression));
results.Add(new DynamicMetaObject(tmp, next.Restrictions));
}
return(new DynamicMetaObject(
Expression.Block(
temps.ToArray(),
steps.ToArray()
),
restrictions
));
}
public override DynamicMetaObject Bind(DynamicMetaObject target, params DynamicMetaObject[] args) {
args = ArrayUtils.Insert(target, args);
List<DynamicMetaObject> results = new List<DynamicMetaObject>(_metaBinders.Length);
List<Expression> steps = new List<Expression>();
List<ParameterExpression> temps = new List<ParameterExpression>();
BindingRestrictions restrictions = BindingRestrictions.Empty;
for (int i = 0; i < _metaBinders.Length; i++) {
BinderMappingInfo curBinder = _metaBinders[i];
DynamicMetaObject[] tmpargs = GetArguments(args, results, i);
DynamicMetaObject next = curBinder.Binder.Bind(tmpargs[0], ArrayUtils.RemoveFirst(tmpargs));
if (i != 0) {
// If the rule contains an embedded "update", replace it with a defer
var visitor = new ReplaceUpdateVisitor { Binder = curBinder.Binder, Arguments = tmpargs };
next = new DynamicMetaObject(visitor.Visit(next.Expression), next.Restrictions);
}
restrictions = restrictions.Merge(next.Restrictions);
if (next.Expression.NodeType == ExpressionType.Throw) {
// end of the line... the expression is throwing, none of the other
// binders will have an opportunity to run.
steps.Add(next.Expression);
break;
}
ParameterExpression tmp = Expression.Variable(next.Expression.Type, "comboTemp" + i.ToString());
temps.Add(tmp);
steps.Add(Expression.Assign(tmp, next.Expression));
results.Add(new DynamicMetaObject(tmp, next.Restrictions));
}
return new DynamicMetaObject(
Expression.Block(
temps.ToArray(),
steps.ToArray()
),
restrictions
);
}
